pilot catalog

8/18/2019 Pilot Catalog

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Anderson Greenwood POPRV CatalogSeries 200, 400, 500, 700, and 800

Copyright © 2 004 Tyco Flow Control. A ll rights reserved. ANGMC-0243-US-0403Total Flow Control Solutions™

Flow Control

ANDERSON

GREENWOOD

In the highly specialized field of pressurerelief devices, no manufacturer can match

the diversified products and experience

of Anderson Greenwood. With more

designs than any other worldwide

manufacturer, Anderson Greenwood’s

product technology solves applications

from the most severe problem to very

basic service conditions. These designs

include a high temperature metal seated

pilot valve, premium performance spring

operated valves, API 526 flanged

conventional and balanced bellows valves

and an extensive iron and bronze product

range. In addition to our well-knownproduct quality, ISO 9001 certifications

have been awarded to both our Stafford,

Texas, and Market Harborough, England,

manufacturing plants, ensuring the ability

to deliver products that meet customers’

precise requirements well into the 21st

century and beyond.

Why Specify PilotOperated Pressure ReliefValves?

• Reduced Installation Costs

• Reduced Product Loss

• Increased Production Levels

• Reduced Maintenance Costs

• Reduced Environmental Pollution

• Increased Operating Income

Pilot Operated Pressure Relief Valves

Anderson Greenwood is registered trademark TycoInternational Services AG or its affiliates in theUnited States and/or other countries. All other

brand names, product names, or trademarksbelong to their respective holders.

Contents

Features and Benefits 2 – 3

How to Select a Valve Type 4

Application Guide 4

SelectionPilot Types

Series 200 5 – 7Series 400 8 – 10

Series 500 11 – 12

Series 700 13 – 16Series 800 17 – 19

Series 400 Iso-Dome 20 – 21

Sizing

How to Size a Valve 22

Sizing Formulas 23

Sizing Factors 24 – 29

Valve Orifice Areas 30

Ordering

How to Order a Valve 3

Materials of Construction

Standard Main Valve 32 – 3

Series 200 Pilot 34 – 3





Inlet Flange Ratings 4

Recommended

Soft Goods Limits 44 – 5

Model Numbering 5

Accessories and Options 53 – 5

Dimensions and Weights 58 – 6

Outlet Flange Ratings 6


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Copyright © 2004 Tyco Flow Control. All rights reserved. ANGMC-0

Ordering (to order the valve)

Construct a ModelNumber

(Page 52)

Review Accessories

and Options

(Pages 53 - 55)

Review

Dimensions and Weights

(Pages 58 - 62)

How to Use This Catalog

Anderson Greenwood is the established

and consistent leader in pilot operated,

pressure relief valve technology. More

than three decades of pilot valve

experience enables us to produce, supply,and support pressure relief valves that:

• assure leak-free system operation veryclose to PRV set pressure

• relieve consistently within codetolerances

• reseat bubble-tight after a short andstable blowdown

• operate through many relief cycleswithout maintenance

This catalog is divided into three primary

parts, which provide step-by-step

instructions that make it easy for you to

select a valve type, determine the proper

orifice area, and order the valve.

Part 1, Selection, helps you determine

the type of valve that best suits your

application.

Part 2, Sizing, provides the informationyou need to choose the correct valve

orifice area. (Sizing is actually part of

valve selection, but since sizing is such

important factor in selection, a separat

section is provided to help you make th

proper choice.)

Part 3, Ordering, explains how to selec

and order the specific model number, a

you have chosen the appropriate valve

type and size.

Use

Application Guide

(Page 4)

Selection (to narrow your choice)

Use

Sizing Formulas

(Page 23)

Review

Orifice Areas

(Page 30)

Review

Sizing Factors

(Pages 24 - 29)

Sizing (to identify orifice size required)


3/65



2

• Soft Seat Design. Provides repeatablebubble-tight performance before and

after each relief cycle.

• Metal-to-Metal Seat Design. Providespilot valve performance in high

temperature service.

• Bubble-tight Seats Near SetPressure.Allows higher system

operating pressure and, therefore,maximum process output; not as

sensitive to vibrational and pulsating

service; reduces product loss.

• Pop Action Available. No main valvethrottling, which helps prevent freeze-

ups in cryogenic or refrigerant type

services.

• Modulation Action Available.Minimized product loss per relief

situation; reduced environmental

pollution; avoids oversizing

consequences; not as sensitive to inlet

pressure losses as pop action.

• Field Test Connection. Quick simpleverification of set pressure while valve

remains in service.

• Balanced Design. Lift not affected byback pressure; no expensive and

fragile bellows required as with direct

spring valves.

• Externally Adjustable Blowdown.Allows blowdown adjustment with valve

in service; no costly removal of valve or

system shutdown required.

• Patented, Piston Wedge Ring.Prevents resonant chatter; no resultant

severe valve damage, lost product or

hazard to personnel.

• Full Lift at Set Pressure. Nooverpressure required for full lift; allows

D.O.T. installation to be set higher than

Maximum Allowable Operating

Pressure (MAOP) when pop action is

used.

• Replaceable Soft Seats and Seals.All seats and seals are easily and

quickly renewable; no expensive, time-

consuming lapping required.

Features and Benefits


4/65



Higher Maximum Set Pressures

Anderson Greenwood’s POPRVs are able

to operate at considerably higher set

pressures than is possible with springloaded SRVs. In some cases one POPRV

can replace five spring loaded SRVs

thereby considerably reducing capital

and installation costs.

Lower Height Profile

Because the Anderson Greenwood

POPRV does not use a spring to hold

the main valve seat closed, considerable

height savings are achieved in the valve

design.The same pilot valve is used for

all main valve sizes providing significant

height savings particularly on larger and

higher pressure valves. This enables the

POPRVs to be used in situations where

space is at a premium.

Weight Savings

As valve size and set pressure increases,

a larger spring is needed to keep the

seat of a spring loaded SRV closed —

increasing the weight of the valve. Signifi-

cant weight savings are provided by the

Anderson Greenwood POPRV, which uses

system pressure via the pilot valve

to maintain seat tightness.These weight

savings allow cost reductions on plant

construction and, in particular, on offshore

oil and gas platforms.

Maximum Set Pressure Comparison

Valve Orifice Area Direct Spring Anderson Greenwood

in [mm] in2

[cm2

] Operated, psig [barg] Pilot Operated, psig [ba8 x 10 Full Bore

38.96 [251.37] N/A 1480+ [102.0+][200 x 250 Full Bore]

8T10 26.00 [167.75] 300 [20.7] 1480+ [102.0+]

6R8 16.00 [103.23] 300 [20.7] 1480+ [102.0+]

4P6 6.38 [41.16] 1000 [69.0] 3705+ [255.5+]

3K4 1.83 [11.86] 2220 [153.1] 3705+ [255.5+]

Height Comparison

Valve Rating Direct Spring Anderson Greenwood Height

in [mm] Operated, in [mm] Pilot Operated, in [mm] Saving

8 x 10150# 57 [1448] 30 [762] 47%

[200 x 250]

6 x 8

[150 x 200]300# 43 [1092] 26 [660] 40%

4 x 6300# 37 [940] 23 [584] 38%

[100 x 150]

3 x 4

[80 x 100]600# 34 [864] 20 [508] 41%

2 x 3600# 23 [584] 19 [483] 19%

[50 x 80]

Weight Comparison

Valve Rating Direct Spring Anderson Greenwood Weight

in [mm] Operated, lb [kg] Pilot Operated, lb [kg] Saving

8 x 10150# 750 [340.9] 421 [191.4] 44%

[200 x 250]

6 x 8

[150 x 200]300# 480 [218.2] 264 [120.0] 45%

4 x 6300# 230 [104.5] 160 [72.7] 30%

[100 x 150]

3 x 4[80 x 100]

600# 160 [72.7] 92 [41.8] 42%

2 x 3600# 70 [31.8] 53 [24.1] 24%

[50 x 80]



5/65



4

Application Guide

Options

Set Pressure Valve Series

psig [barg] 200 400 500 700 800

15 – 720 [1.03 – 49.64]1 X

15 – 1480 [1.03 – 101.97] X

25 – 6170 [1.72 – 413.70]3 X

50 – 1200 [3.45 – 82.74] X

1481 – 6170 [102.12 – 425.42] X

Valve Action

Pop X X

Modulating X X X

Service

Gas/Vapor X X X X X

Liquid2 X X X

Steam X X

Process Temperature, °F [°C]

Ambient to +1000 [Ambient to +538] X

-65 to +600 [-54 to +315] X X

-423 to +600 [-252 to +315] X

-65 to +515 [-54 to +268] X

Notes

1. 11 ⁄ 2-inch x 3-inch [40 x 80 mm] Type 546

has 25 psig [1.72 barg] minimum set.

2. Use Type 249, 259, 269 for cryogenic liquid

(set pressure range for this valve type is 25

to 1440 psig [1.72 to 99.3 barg]).

3. Higher pressures available on special order.

4. Not all valves are available for service atthe extreme limits for both temperature

and pressure simultaneously.

How to Select a Valve Type

To determine which pilot operated safety

relief valve type is most appropriate for

your application, please use the following

guidelines:

1. In the Application Guide (below), note

which valve types seem most

appropriate for your application.

2. Read the associated descriptive and

operating information in the catalog

dedicated to that type of valve (Series

200, 400, 500, 700 or 800).

3. Using the formulas in Part 2, Sizing

(page 25), determine the required

orifice area for your service conditions

and select the orifice area that suits

your application.

4. If you have been able to determine a

pilot operated valve type and orifice

area that suits your application, refer

to Part 3, Ordering (page 33), to select

and order a specific model number. If

you were not able to find a valve type

to meet your application needs, please

contact your Anderson Greenwood

representative, or our factory direct,

for assistance.


6/65



Series 200 Pop Action Safety Valve

Anderson Greenwood’s Series 200 popaction, safety valve, with non-flowing pilot,

provides system overpressure protection

you can count on. Since its 1966

introduction, it has been continuously

refined and remains the standard against

which all other pilot operated valves are

compared.This valve is well suited for

gas, vapor, and many mixed phase

services, including dirty and/or wet

applications.The Series 200 is available

with effective orifice areas of 0.110

through 38.96 inch2 [0.710 through 251.3

cm2], valve inlet sizes 1-inch through 8-

inch [25 mm through 200 mm], setpressures from 25 to over 6000 psig [1.72

to over 413.7 barg], and continuous

service temperatures from -423°F to

+600°F [-253°C to +315°C].


• Balanced Design. Proper valveoperation and lift are unaffected by

back pressure. Costly and fragile metal

bellows are not required.

• External, independent blowdownadjustment. Provides easy, accurate

and repeatable settings. Reducescostly removal of valve or system

downtime.

• ASME Section VIII Code Stamp.Certified National Board capacities for

gas service assures user of

independent third party flow rate

verification.

• Reduced Maintenance Cost. Softseats greatly extend service life,

making costly and time consuming

metal seat lapping unnecessary.

• Suited for Dirty or Wet Service.Non-flowing pilot minimizes entranc

dirt and formation of hydrates in the

pilot. Due to low velocities within the

pilot and supply tubing, most particl

will drop out upstream of pilot inlet

screen. Optional cartridge type pilot

filter is available for extremely dirty

services.

• Increased System Output. Becausof total valve tightness to at least 95

percent of set pressure, the system

can be operated nearer set pressur

without valve leakage, resulting ingreater system throughput.

• Unique Field Test Capability. Thisoption allows accurate set pressure

verification with valve in service. No

system isolation block valve or ruptu

disc required.

• Reduced Product Loss and PollutiSoft seats for premium tightness be

and after relief cycles.

• Rugged Bracket Pilot Mounting.Extremely rigid mounting protects

against vibration and careless

handling. Shake table proven.

• Full Lift at Set Pressure. AllowsD.O.T. installation to be set higher

than Maximum Allowable Operating

Pressure (MAOP), resulting in

increased system throughput.


7/65



6

Series 200 Operations

Normal Closed Position

Relieving Position

Main Valve

Piston Seal

Dome100% of set

Dome

PilotDischarge

Pilot

Set PressureAdjustment

Relief Seat

BlowdownSeat

100% of set

System

BlowdownAdjustment

Main Valve SeatPiston


100% of set Dome

100% of set

System

0%


8/65




Operation

In the normal closed position, full system

pressure is sensed at the pressure pick-

up in the main valve inlet.This pressureis transmitted through the pilot and into

the dome (volume above the main valve

piston). Because the piston seal area is

greater than the main seat sealing area,

the net force on the piston is downward,

keeping the valve tightly closed.The

higher the system pressure, the greater

the downward force on the piston —

exactly the opposite of direct spring

operated valves.

When the pilot senses set pressure, its

relief seat snaps open and the blowdown

seat snaps closed simultaneously, venting

the dome pressure through the pilot relief

seat to atmosphere.This allows the main

valve to open fully at set pressure. The

blowdown seat is held tightly closed during

the relief cycle until the desired system

blowdown is achieved, at which time the

blowdown seat snaps open and the relief

seat snaps closed simultaneously. This

fully repressures the dome to system

pressure and closes the main valve.

The valve reseat pressure is dependent

upon the lift of the spindle off the relief

seat. Higher spindle lift results in more

spring compression and a higher spindleclosing force stored in the pilot spring.The

higher the lift, the shorter the blowdown

(higher valve reseat pressure).The

spindle lift and thus blowdown are

externally adjustable by raising or lowering

the blowdown assembly of the pilot, thus

changing the spindle travel.

Specifications

• Non-flowing pilot.

• Replaceable main valve seat locateon piston to take wear.

• Pilot mounted on severe duty brack

• Vertical pilot mounting.

• Externally adjustable blowdown.

• Options, such as auxiliary f ilter, spiksnubber, and unloader mounted on

main valve with severe duty bracket

• Field replaceable main valve nozzle

• Lettered orifice valves meet APIstandard 526 dimension requiremen

Series 200 Specifications

Pressure

Pressure

D o w n F o r c e o n M a i n V a l v e P i s t o n

0 Set

M a i n V a l v e P i s t o n L i f t

0 Set

C l o s i n g

O p e n i n g

100% Lift

3% MinBlowdo


9/65



8

The Series 400 modulating valve, with

non-flowing pilot, incorporates anadvanced design in pilot operated valves.Under process conditions, both pilot andmain valve can be tight as high as 98 per-cent of set pressure.The main valve liftsproportionally, according to demand,restricting product loss to only that whichmust be relieved to prevent process pres-sure from exceeding the code allowance.

The Series 400 valve is well suited for gas

and/or liquid services, including dirty

and/or wet services.The modulating

action is strongly preferred for liquid relief

because it eliminates the destructive

effects of ‘liquid hammer.’The Series 400valve is available with the following:

effective orifice areas of 0.110 through

38.96 inch2 [0.710 through 251.3 cm2]

valve inlet sizes 1-inch through 8-inch

[25 mm through 200 mm], set pressure

between 15 and 1480 psig [1.03 and

102.0 barg], and continuous service

temperatures from -65°F to +600°F

[-54°C to +315°C].


• Unique Field Test Capability. Allowsaccurate set pressure verification with

valve in service. No system isolation

valve or rupture disc required.All field

test connections are provided with an

indicator for accurate and easy set

pressure testing.

• Reduced Product Loss andPollution. Soft seats for premium

tightness before and after relief cycles.

Modulating action relieves minimum

product to prevent overpressure.

• ASME Section VIII Code Stamp.Certified National Board capacitiesfor both gas and liquid service assures

user of independent third party flow

rate verification.

• Non-flowing Pilot. Minimizes entranceof dirt and formation of hydrates in


pilot and supply tubing, most particles

will drop out upstream of pilot inlet

screen. Optional cartridge type pilot


services.

• Rugged Bracket Pilot Mounting.Extremely rigid mounting protecting


handling. Shake table proven.

• Reduced Noise. Modulating actionminimizes flow and resultant noise

during normal system upset, reducing

noise abatement costs.

• Increased System Output. Becauseof valve tightness to 98 percent of set

pressure, the system can be operated

nearer set pressure without valve

leakage, resulting in greater system

throughput.

• Reduced Maintenance Costs. Softseats greatly extend service life,

making costly and time-consuming


• Ease of Adjustment. Singleadjustment for set pressure allows

accurate and dependable setting.


back pressure.Costly and fragile metal


* Patent Protected

Series 400* Modulating Safety Relief Valve


10/65




Sense Diaphragm


Tubed to MainValve Outlet

Feedback PistonPiston

Outle

Seat

InleSe

Dome

Main Valve

Operation

With no system pressure, the pilot inlet

seat is open and the outlet seat is closed.

As pressure is admitted to the main valveinlet, it enters the pilot through a filter

screen. Pressure is then transmitted

through passages in the feedback piston,

past the inlet seat, into the main valve

dome, which causes the main valve piston

to remain closed.

As system pressure increases and

approaches valve set pressure, it acts

upward on the sense diaphragm, with the

feedback piston also moving upward to

close the inlet seat.This seals in the main

valve dome pressure, since the outlet seat

is also closed. A small, further increase in

system pressure opens the outlet seat,

partially venting the main valve dome

pressure.This reduced dome pressure

acts on the unbalanced feedback piston to

reduce feedback piston lift, tending to ‘lock

in’ the dome pressure.Thus, at any stable

inlet pressure, there will be no pilot flow

(i.e., zero leakage).

As inlet pressure rises above set

pressure, dome pressure reduction will

provide modulating action of the main

valve piston proportional to the process

upset. The spool/feedback piston

combination will move, responding tosystem pressure, to alternately allow

pressure in the main valve dome to

increase or decrease.This moves the

main valve piston to the exact lift that will

keep system pressure constant at the

required flow. Full main valve lift, and

therefore full capacity, is achieved with

relatively little overpressure. As system

pressure decreases below set pressure,

the feedback piston moves downward and

opens the inlet seat to admit system

pressure to the dome.This closes the

main valve.The pilot exhaust is always

piped to the main valve outlet.

Below Set Pressure With Main Valve Closed

Pressure


Set

C l o

s i n

g

100% Lift

O p e n

i n g

Pressure


0Set

95% Set Pres.,Minimum


11/65



10


Tubed toMain ValveOutlet

Above Set Pressure With Main Valve Fully Open

Specifications


• Single point set pressure adjustment.

• Replaceable main valve seat, locatedon piston to take wear.

• Feedback mechanism in pilot,independent of primary pressure

sensing mechanism, to ensure smooth

modulation of main valve.

• Indicator button for field test capability.

• Field replaceable main valve nozzle.

• Lettered orifices meet API standard526 dimension requirements.


At or Slightly Above Set Pressure Main Valve Partially Open and Modulating


12/65



The Anderson Greenwood Series 500 is a

unique soft seated safety relief valve

designed to handle higher temperatures. It

was created with a specific designobjective: to decrease the leakage

associated with metal-seated safety relief

valves under extreme operating

temperature conditions.

The result is a modulating, soft-seated,

pilot operated valve offering premium

tightness with the ability to handle

temperatures from -65°F to 515°F [-54°C

to 268°C] and a set pressure range of 15

to 720 psig [1.03 to 49.6 barg].

The soft seat in the Series 500 main valve

is more resistant to particulate damage

than a metal seat, has a longer service

life, and can be quickly replaced while the

valve body remains installed in the line.

Its unique design enables the main valve

to be tight at pressures up to set point.

After relieving and reseating, it stays

bubble-tight, cycle after cycle. Applications

for the Series 500 include hot water,

steam (ASME section VIII Unfired

Pressure Vessels), hot hydrocarbon

vapors or liquids, and corrosive services.


• Reduced Product Loss andPollution. Soft seats for premium

tightness before and after relief cycles.

• All Plastic Soft Goods. There are noelastomer seats or seals providing

additional chemical compatibility with

the lading fluid.

• Increased System Output. Becauseof total valve tightness to at least 95

percent of set pressure, the system

can be operated nearer to set pressurewithout valve leakage.The result is

greater system production capability.

• Reduced Maintenance Costs.Resilient seats greatly extend service

life. Costly and time consuming metal

seat lapping is unnecessary.


back pressure. Costly and fragile metal


• ASME Section VIII Stamp. Certified

National Board capacities for steam,gases, and liquids assures user of


verification.

• Unique Field Test Capability. Allowaccurate set pressure verification w

valve in service. No system isolation

valve or rupture disc is required.Sin

indicator button is available for

accurate and easy verification of se

pressure.


during normal system upset reducin


•Ease of Adjustment. Adjustment fo

set pressure allows accurate and

dependable setting.

Series 500 Modulating Safety Relief Valve


13/65

Operation

In normal operation, the system pressure

acts on the area contained by the main

valve seat at the bottom of the free-

floating differential area piston and on the

top of the piston.Since the top of the

piston

is larger than the bottom (seat area), there

is a large downward net force holding the

piston closed. Under static conditions, the

seating force increases as the system

pressure increases and approaches set

point.

When the set pressure is reached, the

pilot opens and partially depressurizes the

dome. This reduces the force on the top of

the piston to the point where the upward

force on the seat area can overcome the

reduced downward loading. This causes

the piston to lift, resulting in modulated

flow through the main valve.

When the relief demand has beensatisfied, the pilot closes, full system

pressure is diverted to the dome, and the

piston moves downward, closing the main

valve.

A patented, pressure responsive piston

drag system in the larger Series 500

valves eliminates resonant chatter and

the severe valve and/or piping damage

it can cause.The wedge ring creates a

pressure-actuated sliding friction force

between the piston and liner, preventing

resonant chatter.

Specifications

• Durable but replaceable Teflon ® seat inmain valve, located on piston to take

the wear. A totally captive seat design

eliminates seat extrusion at elevated

temperatures.

• Teflon ® /PEEK seals throughout mainvalve and pilot for optimum chemical

resistance, such as needed for various

chemicals in boiler feed water.

• Dual diaphragm pilot for minimum firstleak-to-relief pressure.

• Single point set pressure adjustment.



• Lettered orifice valves meet APIstandard 526 dimension requirements.

Note

1. Teflon ® is a registered trademark of the E.I.

duPont de Nemours Company.



12


Set

Pressure

0

Pressure


Set

C l o

s i n

g

100% Lift

O p e n

i n g


DomePressure

Dome

Field TestConnection(optional)

Pilot DischargePiped to MainValve Outlet

Pilot

Liner

Piston Seal

Wedge Ring

Piston

Piston Seal

Seat

SensePickup


14/65



The Series 7001 pilot operated safety

valve is unique as an all metal seated

pilot and main valve. This extends the

use of pilot technology to temperatures

up to 1000°F [538°C]. The valve is suitable

for steam and/or gas service.The Series

700 is available with effective areas of

0.503 through 26.00 in2 [3.245 through

167.7 cm2].


• All Metal-to-Metal Seating Surfaces.

Trim specifically designed for high

temperature service, plus enhancedchemical compatibility.

• Patented Flexible Disc. Reduces

impact wear while increasing seat

tightness.

• Dampened Trim. Dampening

chambers control the opening and

closing response, increasing valve

cycle life.

• Non-Flowing Pilot. Reduces seat

wear and minimizes entrance of dirt

and particulates in the pilot.

• Adjustable Blowdown. Blowdown

can be adjusted between 3% and 15%

by turning the blowdown adjustment

sleeve. Upper and lower blowdown

rings and pins are not required, saving

time, parts and costs.

• ASME Section VIII Code Stamp.

Certified National Board capacities

steam and gas service assures use


verification.

• Unique Field Test Capability, this

option allows accurate set pressure

verification with valve in service. No

system isolation block valve or rupt

disc required.

700 Manifolded Dual Pilots2

(Optional)• For maximum operating conditions

is recommended to use dual pilots

built-in switching mechanism.

• The safety lock allows the operator

isolate only one pilot while the activ

pilot protects the system.

• In-service testing and replacement

pilot under operating condition with

system protection.

Notes

1. U.S. Patent Number 5,064,169

2. U.S. Patent Number 5,590,684

Series 7001 Pop Action Safety Valve

Dual Pilots

Manifold

Changeover valves

Safety lock

Field testconnection


15/65



14


Class 300 Design Scope

Pressure and Temperature Rating1000 [538]

800[427]

600[316]

400[204]

200[93]

00 200

[13.8]400

[27.6]600

[41.4]800

[55.2]

MaterialCode

S2WCB

S1WCB

° F [ ° C ]

psig [barg]

S3WC6


Pressure and Temperature Rating1000

[538]

800[427]

600[316]

400[204]

200[93]

0

0 100[6.9]

200[13.8]

300[20.7]

400[27.6]

MaterialCode

S2WCB

S1WCB

° F [ ° C ]

psig [barg]

Specifications


• Vertical pilot mounting.

• Externally adjustable blowdown.

• Field replaceable nozzle.

• ANSI pressure class 150, 300 and 600.

• All metal seats/seals.

Pressure and Temperature Rating1000 [538]

800[427]

600[316]

400[204]

200[93]

0

0 200[13.8]

400[27.6]

600[41.4]

800[55.2]

MaterialCode

S2WCB

S1WCB

° F [ ° C ]

psig [barg]

S3WC6

1000[69.0]

1200[82.8]



16/65



Series 700 Operation

Operation

Steam Service

In the closed position, when operating

below set point, the valve internal pressureis equal to the system pressure and the

piston is pressure balanced.

System pressure is directed to three key

areas of the valve:

1. The Dome, via the dome charging

orifice;

2. The Pilot, via the integral pressure

sensing connection and the external pilot

inlet sensing line; and

3. The Unloader, via the sensing line

connections from the pilot dome and theintegral sensing connection from the

dome through the cap.

The seating force is produced by system

pressure acting on the internal exposed

disc surface area. As system pressure

increases, the seating force increases

providing maximum seat tightness up to set

point when the valve opens.

When system pressure reaches set point

and overcomes the pilot spring force, the

pilot pops open and sets into motion four

key reactions:

1. The normally open reseat piston moves

into full lift and closes against the

blowdown seat preventing further system

pressure from flowing through the pilot.

This is the non-flowing pilot feature.

2. Unloader dome pressure is vented

through the pilot vent to atmosphere.With

the internal pilot pressure relieved, the

pilot spring is now sensing system

overpressure in the pilot inlet sensing line

via the spindle-disc-spacer rod-reseat

piston.

3. The venting of unloader dome pressurecreates a pressure imbalance which

opens the unloader piston. Main dome

pressure is now being vented into the

valve outlet, and the pressure drop

backseats the drain plunger, preventing

system pressure from charging the dome.

System PressureUnloader

Piston

UnloaderDome

SpindPilot D

Relief Seat(Open)

Spacer

Blowdown Seat (Closed)

Reseat Piston

System Pressure

Nozzle

Disc Piston Dome

Unloader

Pilot

PilotVent

Dome Charging Orifice

Pressure Sensing (Integral)

Main Valve

Drain Plunger

Relief Seat(Closed)

Blowdown Seat(Open)

Relieving Position



17/65



16

4. The depressurisation of the piston dome

pressure produces a pressure imbalance

which moves the piston/disc assembly

off the nozzle seat.As the media begins

to exit through the valve outlet, thedownstream disc surface area is

subjected to system overpressure and

the piston/disc assembly goes into full lift

instantaneously.

When system overpressure has been fully

relieved, the pilot spring closes the pilot

disc onto the relief seat. The valve now

goes into the blowdown phase and sets

into motion the above mentioned four key

reactions in reverse:

1. The pilot disc-spacer rod pushes the

reseat piston off the blowdown seat and

the internals of the pilot spring-spindle-

disc assembly are once again sensing

system pressure.

2. With the pilot closed and the pilot vent

isolated, system pressure is now

directed to the unloader dome.

3. Recharging the unloader dome causes

the unloader piston to close and stops

the depressurisation of the piston dome

pressure.

4. System pressure is now charging the

piston dome via the dome charging

orifice. The pressure imbalance is now

closing the piston/disc assembly.

With the main disc closed and outlet

pressure on the disc eliminated, the

system pressure acting on the internal

exposed area of the disc once again re-

establishes maximum seat tightness.

Air, Gas or Vapor ServiceFor air, gas and vapor service, the

assembly of the main valve and pilot is

modified for valves 4” x 6” and smaller as

follows:

1. The unloader is deleted and the pilot

dome connected directly to cap.

2. The unloader discharge port in the

valve outlet is plugged.

3. The dome charging orifice in the piston

is deleted.

4. A snubber is installed at the pilot inlet to

dampen system pulsations.

The operation of the main valve and pilot

in air, gas and vapor service is the same

as the steam valve.

The pilot is able to vent and depressurizethe main dome with sufficient speed to

provide proper opening and closing

performance without the use of an

unloader.

For mixed phase flow, consult the factory

to determine if unloader is required.


System Pressure

Nozzle

Disc

Piston

Dome

Pilot

Pressure Sensing (Integral) Main Valve

Drain Plunger

Relief Seat(Closed)

Blowdown Seat(Open)

PilotVent

Snubber


For 6” x 8” and 8” x 10” valves the unloader is

utilized to optimize the performance.

Air/Gas/Vapor

2” x 3” through 4” x 6”


18/65



The Series 800 modulating valve utilizes

the most advanced design in pilot operated

valves.The non-flowing, modulating pilot

can be set at pressures up to 6170 psig

[425.52 barg].Under these processconditions, the pilot and main valve can be

tight up to 98 percent of set pressure.

Since the pilot is modulating, the main

valve lifts proportionally according to

demand, restricting product loss to only

that which needs to be relieved to prevent

the process pressure from exceeding the

code allowance.The pilot provides stable

lift even on hard liquid systems due to its

unique trim. The 800 Series can also be

used in gases or mixed phase lading

fluids, including dirty and/or wet services.

The Series 800 valve is available with

the following: effective orifice areas of

0.110 through 9.489 in2 [0.710 through

61.21 cm2], valve inlet sizes 1-inch

through 4-inch [25 mm through 100 mm],

set pressures between 1481 and

6170 psig [102.13 and 425.52 barg],

and continuous temperatures from

-6°F to +600°F [-54°C to + 315°C].


• High Set Pressure Capability.Provides modulating, non-flowing pilot

valve performance to 6170 psig

[425.42 barg].

• Unique Field Test Capability. Allowsaccurate set pressure verification with

valve in service with minimal amount

of test gas.All field test connections

are provided with an indicator for

accurate and easy set pressure testing.

• Reduced Product Loss andPollution. Soft seats for premiumtightness before and after relief cycles.

Modulating action relieves minimum

product to prevent overpressure.

• ASME Section VIII Code Stamp.Certified National Board capacities for

both gas and liquid service assures

user of third party flow rate verification.

• Non-flowing pilot. Minimizes entranceof dirt and formation of hydrates in


pilot and supply tubing, most particles

will drop out upstream of pilot inletscreen. Optional cartridge type pilot


services.

• Rugged Bracket Pilot Mounting.Extremely rigid mounting protects


handling.


during normal system upset, reduci


• Increased System Output. Becausof valve tightness to 98 percent of s

pressure, the system can be operat

nearer set pressure without valve

leakage, resulting in greater system

throughput.

• Ease of Adjustment. Singleadjustment for set pressure allows

accurate and dependable setting.

• Reduced Maintenance Costs. Sofseats greatly extend service life,

making costly and time-consuming



back pressure. Costly and fragile met


Series 800 Modulating Safety Relief Valve


19/65



18

Operation

With no system pressure, the pilot inlet

seat is open and the outlet seat is closed.

As pressure is admitted to the main valveinlet, it enters the pilot through a filter

screen. Pressure is then transmitted

through passages in the feedback piston,

past the inlet seat, into the main valve

dome, which causes the main valve piston

to remain closed.

As system pressure increases and

approaches valve set pressure, it acts

upward on the sense O-ring seal, with

the feedback piston moving upward to

close the inlet seat.This seals in the main

valve dome pressure, since the outlet seat

is also closed. A small, further increase in

system pressure opens the outlet seat,

partially venting the main valve dome

pressure.This reduced dome pressure

acts on the unbalanced feedback piston to

reduce feedback piston lift, tending to ‘lock

in’ the dome pressure.Thus, at any stable

inlet pressure, there will be no pilot flow

(i.e., zero leakage).


pressure, dome pressure reduction will

provide modulating action of the main

valve piston proportional to the process

upset. The spool/feedback piston

combination will move, responding tosystem pressure, to alternately allow

pressure in the main valve dome to

increase or decrease.This moves the

main valve piston to the exact lift that will

keep system pressure constant at the

required flow. Full main valve lift, and

therefore full capacity, is achieved with

relatively little overpressure. As system

pressure decreases below set pressure,

the feedback piston moves downward and

opens the inlet seat to admit system

pressure to the dome.This closes the

main valve.The pilot exhaust is always

piped to the main valve outlet.


Main Valve

Dome


Sense Seal

Pilot InletSeat

Pilot OutletSeat


Feedback

Piston


At or Slightly Above Set Pressure Main Valve Partially Open and Modulating


20/65





Above Set Pressure With Main Valve Fully Open

Pressure

D o w n F o r c e o n M a i n V a

l v e P i s t o n

0Set

95% Set Pres.,Minimum

Pressure

M a i n V a l v e P i s t o

n L i f t

C l o

s i n

g

100% Lift

O p e n i n

g

Set

Specifications

• Non-flowing pilot.• Single-point set pressure adjustment.

• Replaceable main valve seat, located on piston to take wear.

• Feedback mechanism in pilot, independent of primary pressure sensing mechanismto ensure smooth modulation of main valve.



• Lettered orifice valves meet API standard 526 dimension requirements.


21/65



20

The Iso-Dome accessory for the 400 pilot

provides protection of the critical pilot

internals from the process media.The pilot is

actuated by the process fluid and is ASME

Section VIII Code stamped for gas and liquid

service. The Iso-Dome pilots are available

with the following: effective orifices areas of

0.110 through 38.96 inch2 [0.710 through

251.3 cm2 ], valve inlet sizes 1-inch through

8-inch [25 mm through 200 mm], set

pressure between 15 and 6170 psig [1.03

and 413.7 barg], and continuous

service temperature from -65°F to +500°F

[-54°C to +260°C].


• Critical Pilot Internals and MainValve Dome Protected from Process

Media. Expands the application of pilot

operated valve technology.

• Valve is Fail-safe. Meets ASME coderequirements.

• Allows System Operating Pressureto be Near Set Pressure. SRV

tightness is maintained, resulting in

greater system throughput.

• All Adjustments are Factory Sealed.Just add the clean gas supply for simple

and inexpensive field installation.

• Modulating Action. Minimizes fugitiveemissions, product release, product loss,

and noise.

• Valve Operation Insensitive to Back Pressure. Costly and fragile metal

bellows not required.

• Unique Field Test Capability. Setpressure may be verified while valve

remains in service protecting the system.

No system isolation valve or rupture discrequired.

* Patent Protected

Iso-Dome* Series 400 Valve


22/65



Clean Gas Supply

Process Media

Dome

Main Valve Pilot

Piston

PilotVent


Sense Diaphragm

Pilot Spring

Feedback Piston

InletSeat

OutletSeatRegulator

(Supplied by Anderson Greenwood,Mounted on PRV)

Clean Gas Supply (N2, Air, etc.)(Supplied by User)

Iso-Dome* Series 400 Valve

Operation

Process media enters the main valve and

is ported to the pilot sense diaphragm.

The motive fluid for the pilot and main

valve is typically nitrogen or air (clean gas

supply) and is ported into the seating

areas of the pilot and the main valve

dome. This clean gas supply is regulated

to provide pressure into the pilot and main

valve at slightly below the set pressure of

the POPRV.

In the closed position, the downward force

on the piston in the main valve providedby the clean gas supply exceeds the

upward force on the piston developed by

the process media. At just below set

pressure, it is the static pressure of the

process media that compresses the pilot

spring via the sense diaphragm.As the

process media pressure increases, the

upward movement of the sense

diaphragm and feedback piston closes the

pilot inlet seat. A small, further increase in

process media pressure opens the outlet

seat. The clean gas supply (motive fluid)

now exhausts from the main valve dome

via the pilot vent.This reduced dome

pressure acts on the unbalanced feedback

piston lift, and “locks in” dome pressure.

Thus at any stable inlet process media

pressure there will be no pilot flow.This

conserves the clean gas supply volume to

provide multiple valve cycles if necessary.


pressure, further dome pressure reduction

will modulate the main valve piston

proportional to the process media upset.

The feedback piston will move, responding

to the process media pressure to exhaust

or supply the main valve dome with the

clean motive fluid.This puts the main

valve piston in the correct position to

relieve only that process media needed

satisfy the overpressure.

As the process media pressure decrea

below set pressure, the feedback pisto

moves downward and opens the inlet s

to admit the clean gas supply into the

main valve dome. This closes the main

valve.

The process media porting to the pilot

remains a static pressure at all timesduring this opening and closing operati

The internal seating areas of the pilot a

the main valve dome are never expose

this process media at any time.



23/65



22

Valves are selected on the basis of their

ability to meet an expected relieving

condition, flowing a sufficient amount of

fluid to prevent excessive pressure

increase.This means that the size of thevalve orifice must be calculated taking the

required flow, performance characteristics,

lading fluid properties, and other factors

into consideration.

The sizing procedure presented utilizes

the recommended practice of API 520

Part I. The valve orifice areas and nozzle

discharge coefficients shown are effective

values in that they are not specific to a

particular valve type. The use of these

effective orifice areas and effective

nozzle discharge coefficients will

always allow for the selection of avalve orifice area that will meet or

exceed the required capacity.

The calculation of the actual certified

valve capacity can be performed with the

Anderson Greenwood sizing software

program enclosed in the catalog binder.

To select the minimum required orifice

area that will flow the required capacity of

the system you wish to protect, please

refer to the following information which

appears in this section:

1. Sizing Formulas

2. Correction Factors

3. Valve Orifice Areas

Once you have determined the required

orifice area for your service conditions,

refer to Part 3, Ordering (page 31), to

select a specific valve model number.

How to Size a Valve


24/65


25/65



24

Values of M, k, and C For Representative Gases and Vapors

Gas or Vapor M k C

Molecular Specific GasWeight Heat Ratio Constant

Acetylene (C2H2) 26 1.26 343

Air 29 1.40 356

Ammonia (NH3) 17 1.31 348

Argon (Ar) 40 1.67 378

Benzene (C6H6) 78 1.12 329

Butadiene (C4H6) 54 1.12 329

Carbon Dioxide (CO2) 44 1.28 345

Carbon Monoxide (CO) 28 1.40 356

Ethane (C2H

6) 30 1.19 336

Ethylene (C2H4) 28 1.24 341

Freon 22 86.5 1.18 335

Helium (He) 4 1.66 377

Hexane (C6H14) 86 1.06 322

Hydrogen (H2) 2 1.41 357

Hydrogen Sulphide (H2S) 34 1.32 349

Methane (CH4) 16 1.31 348

Methyl Mercaptan (CH4S) 48.1 1.20 337

n-Butane (C4H10) 58 1.09 326

Natural Gas (SF = 0.60) 17.4 1.27 344

Nitrogen (N2) 28 1.40 356

Oxygen (O2) 32 1.40 356

Pentane (C5H12) 72 1.97 323

Propane (C3H8) 44 1.13 330

Propylene (C3H6) 42 1.15 332

Propylene Oxide (C3H6O) 58.1 1.21 338

Steam 18 1.31 348

Sulphur Dioxide (SO2) 64 1.29 346

VCM (C3H3CI) 62.5 1.18 335

Sizing


26/65



Sizing

k C

1.00 315

1.02 318

1.04 320

1.06 322

1.08 324

1.10 327

1.12 329

1.14 331

1.16 333

1.18 335

1.20 3371.22 339

1.24 341

1.26 343

1.28 345

1.30 347

1.32 349

1.34 351

1.36 352

1.38 354

1.40 3561.42 358

1.44 359

1.46 361

1.48 363

1.50 364

k C

1.52 366

1.54 368

1.56 369

1.58 371

1.60 372

1.62 374

1.64 376

1.66 377

1.68 379

1.70 380

1.72 3821.74 383

1.76 384

1.78 386

1.80 387

1.82 388

1.84 390

1.86 391

1.88 392

1.90 394

1.92 3951.94 397

1.96 398

1.98 399

2.00 400

2.02 401

Gas Constant, C


27/65



26

Back Pressure Correction Factor for Series 200, 400, 500 and 800

Sizing

k = 1.0

k = 1.2

k = 1.6

k = 1.8

k = 2.0

k = 1.4

1.0

0.9

0.8

0.7

0.6

0.5

0.4

0.3

0.2

0.1

0

0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0

B a c k P r e s s u r e F a c t o r , K b

P2 / P1 = Absolute Pressure Ratio at Valve Outlet Connection

1. The curves above will vary from one size of

valve and orifice combination to the other.

The curves shown on this page represent

the most conservative back pressure correc-

tion factor for all series of valves (except

Series 700) shown in this catalog. The sizing

software will utilize the actual back pressure

correction factor for the valve selected.

2. When capacity reduction is represented by

the above curves, it is due to obtaining criti-

cal pressure or higher at the valve’s nozzle

exit for full lift valves or curtain area for

restricted lift valves. PN is greater than P2because of the pressure drop that occurs in

the downstream body geometry.

Notes


28/65



1. The curves above are the actual correction

values for all series 700 configurations.

2. When capacity reduction is represented by

the above curves it is due to obtaining criti-

cal pressure or higher at the valve’s nozzle

exit (PN). There is no significant pressure

loss in the downstream body geometry,

therefore PN = P2.

Sizing

1.0

0.98

0.96

0.94

0.92

0.90

0.88

0.86

0.4 0.45 0.50 0.55 0.60 0.65 0.70

B a c k P r e s s u r e F a c t o r , K b

P2 / P1 = Absolute Pressure Ratio at Valve Outlet Connection

k = 1.0

k = 1.2

k = 1.4

k = 1.6

k = 1.8

k = 2.0

Back Pressure Correction Factor for Series 700

Notes


29/65



28

Steam Super Heat Correction Factor, Ks

Set Saturated Total Steam Temperature °F [°C]

Pressure Steam 280 300 320 340 360 380 400 420 440 460 480 500 520 540 560

psig [barg] Temp.°F [°C] [138] [149] [160] [171] [182] [193] [205] [216] [227] [238] [249] [260] [271] [282] [293]

15 [1.03] 250 [121] 1.00 1.00 1.00 .99 .99 .98 .98 .97 .96 .95 .94 .93 .92 .91 .90

20 [1.38] 259 [126] 1.00 1.00 1.00 .99 .99 .98 .98 .97 .96 .95 .94 .93 .92 .91 .90

40 [2.76] 287 [142] 1.00 1.00 1.00 .99 .99 .98 .97 .96 .95 .94 .93 .92 .91 .90

60 [4.14] 308 [153] 1.00 1.00 .99 .99 .98 .97 .96 .95 .94 .93 .92 .91 .90

80 [5.52] 324 [162] 1.00 1.00 .99 .99 .98 .97 .96 .94 .93 .92 .91 .90

100 [6.90] 338 [170] 1.00 1.00 .99 .98 .97 .96 .95 .94 .93 .92 .91

120 [8.27] 350 [177] 1.00 1.00 .99 .98 .97 .96 .95 .94 .93 .92 .91

140 [9.65] 361 [183] 1.00 1.00 .99 .98 .96 .95 .94 .93 .92 .91

160 [11.0] 371 [188] 1.00 1.00 .99 .98 .97 .95 .94 .93 .92 .91

180 [12.4] 380 [193] 1.00 .99 .98 .97 .96 .95 .93 .92 .91

200 [13.8] 388 [198] 1.00 .99 .99 .97 .96 .95 .93 .92 .91

220 [15.2] 395 [202] 1.00 1.00 .99 .98 .96 .95 .94 .93 .92

240 [16.6] 403 [206] 1.00 .99 .98 .97 .95 .94 .93 .92

260 [17.9] 409 [210] 1.00 .99 .98 .97 .96 .94 .93 .92

280 [19.3] 416 [213] 1.00 1.00 .98 .97 .96 .95 .93 .92

300 [20.7] 422 [217] 1.00 .99 .98 .96 .95 .93 .92

350 [24.1] 436 [225] 1.00 1.00 .99 .96 .96 .94 .93

400 [27.6] 448 [231] 1.00 .99 .96 .96 .95 .93

450 [31.0] 460 [238] 1.00 .96 .96 .96 .94

500 [34.5] 470 [243] 1.00 .96 .96 .96 .94

550 [37.9] 480 [249] .97 .97 .97 .95

600 [41.4] 489 [254] .97 .97 .97 .97

650 [44.8] 497 [258] 1.00 .99 .97

700 [48.3] 506 [263] 1.00 .99 .97

750 [51.7] 513 [267] 1.00 1.00 .98

800 [55.2] 520 [271] 1.00 .99

850 [58.6] 527 [275] 1.00 .99

900 [62.1] 533 [278] 1.00 1.00

950 [65.5] 540 [282] 1.00

1000 [69.0] 546 [286] 1.00

1050 [72.4] 552 [289] 1.00

1100 [75.9] 558 [292]

1150 [79.3] 563 [295]

1200 [82.7] 569 [298]

Sizing


30/65



Sizing

Steam Super Heat Correction Factor, Ks

Set Saturated Total Steam Temperature °F [°C]

Pressure Steam 580 600 620 640 660 680 700 720 740 760 780 800 900 1000 11

psig [barg]Temp.°F [°C] [305] [316] [326] [338] [349] [360] [371] [382] [393] [405] [416] [427] [482] [537] [5

15 [1.03] 250 [121] .89 .88 .87 .86 .86 .85 .84 .83 .83 .82 .81 .81 .78 .75

20 [1.38] 259 [126] .89 .88 .87 .86 .86 .85 .84 .83 .83 .82 .81 .81 .78 .75

40 [2.40] 287 [142] .89 .88 .87 .87 .86 .85 .84 .84 .83 .82 .82 .81 .78 .75

60 [4.14] 308 [153] .89 .88 .87 .87 .86 .85 .84 .84 .83 .82 .82 .81 .78 .75

80 [5.52] 324 [162] .89 .89 .88 .87 .86 .85 .84 .84 .83 .82 .82 .81 .78 .75

100 [6.90] 338 [170] .90 .89 .88 .87 .86 .85 .85 .84 .83 .82 .82 .81 .78 .75

120 [8.27] 350 [177] .90 .89 .88 .87 .86 .85 .85 .84 .83 .82 .82 .81 .78 .75

140 [9.65] 361 [183] .90 .89 .88 .87 .86 .85 .85 .84 .83 .82 .82 .81 .78 .75

160 [11.0] 371 [188] .90 .89 .88 .87 .86 .86 .85 .84 .83 .82 .82 .81 .78 .75

180 [12.4] 380 [193] .90 .89 .88 .87 .86 .86 .85 .84 .83 .82 .82 .81 .78 .75

200 [13.8] 388 [198] .90 .89 .88 .87 .86 .86 .85 .84 .83 .83 .82 .81 .78 .75

220 [15.2] 395 [201] .91 .90 .89 .88 .87 .86 .85 .84 .8 .83 .82 .81 .78 .75

240 [16.6] 403 [206] .91 .90 .89 .88 .87 .86 .85 .84 .84 .83 .82 .81 .78 .75

260 [17.9] 409 [209] .91 .90 .89 .88 .87 .86 .85 .85 .84 .83 .82 .81 .78 .75

280 [19.3] 416 [213] .91 .90 .91 .88 .87 .86 .85 .85 .84 .83 .82 .82 .78 .75

300 [20.7] 422 [217] .91 .90 .89 .88 .87 .86 .86 .85 .84 .83 .82 .82 .78 .75

350 [24.1] 436 [224] .92 .91 .90 .89 .88 .87 .86 .85 .84 .83 .83 .82 .78 .76

400 [27.6] 448 [231] .92 .91 .90 .89 .88 .87 .86 .85 .84 .84 .83 .82 .79 .76

450 [31.0] 460 [238] .93 .92 .91 .89 .88 .87 .86 .86 .85 .84 .83 .82 .79 .76

500 [34.5] 470 [243] .93 .92 .91 .90 .89 .88 .87 .86 .85 .84 .83 .82 .79 .76

550 [37.9] 480 [249] .94 .92 .91 .90 .89 .88 .87 .86 .85 .84 .83 .82 .79 .76

600 [41.4] 489 [254] .94 .93 .92 .90 .89 .88 .87 .86 .85 .84 .84 .83 .79 .76

650 [44.8] 497 [258] .95 .94 .92 .91 .90 .89 .87 .86 .86 .85 .84 .83 .79 .76

700 [48.3] 506 [263] .96 .94 .93 .91 .90 .89 .88 .87 .86 .85 .84 .83 .79 .76

750 [51.7] 513 [267] .96 .95 .93 .92 .90 .89 .88 .87 .86 .85 .84 .83 .79 .76

800 [55.2] 520 [271] .97 .95 .94 .92 .91 .90 .88 .87 .86 .85 .84 .84 .80 .76

850 [58.6] 527 [275] .98 .96 .94 .93 .92 .90 .89 .88 .87 .86 .85 .84 .80 .76

900 [62.1] 533 [278] .99 .97 .95 .93 .92 .90 .89 .88 .87 .86 .85 .84 .80 .77

950 [65.5] 540 [282] .99 .97 .95 .94 .92 .91 .89 .88 .87 .86 .85 .84 .80 .77

1000 [69.0] 546 [286] .99 .98 .96 .94 .93 .91 .90 .89 .87 .86 .85 .84 .80 .77

1050 [72.4] 552 [289] 1.00 .99 .97 .95 .93 .92 .90 .89 .88 .87 .86 .85 .80 .77

1100 [75.9] 558 [292] 1.00 .99 .98 .95 .94 .92 .91 .89 .88 .87 .86 .85 .81 .77

1150 [79.3] 563 [295] 1.00 .99 .98 .96 .94 .92 .91 .90 .88 .87 .86 .85 .81 .77

1200 [82.7] 569 [298] 1.00 .99 .98 .97 .95 .93 .91 .90 .89 .87 .86 .85 .81 .77


31/65



30

Sizing

Effective API Orifice Area, in2 [cm2]

Valve Size Types 253, 453, 853 Types 243, 443, 843 Types 2632 , 4632 , 8632 Type 727

in [mm] Type 259 Type 249 Type 2692

Type 546 Type 5662

1 x 2 0.110 (‘D’) [0.710]

[25 x 50]0.307 (‘F’) [1.981] — —

11 / 2 x 2 0.196 (‘E’) [1.265]

[40 x 50]

11 / 2 x 2

[40 x 50]0.503 (‘G’) [3.245]3 0.785 (‘H’) [5.065]3 1.320 [8.516] —

11 / 2 x 30.503 (‘G’) [3.245] 0.785 (‘H’) [5.065] — —

[40 x 80]

0.503 (‘G’) [3.245]2 x 3 0.503 (‘G’) [3.245]

1.287 (‘J’) [8.303] 2.554 [16.47] 0.785 (‘H’) [5.065][50 x 80] 0.785 (‘H’) [5.065]

1.287 (‘J’) [8.303]

2 x Dual 3–– –– 2.554 [16.47] ––

[50 x Dual 80]

1.287 (‘J’) [8.30]3 x 4 1.287 (‘J’) [8.303]

2.853 (‘L’) [18.41] 5.938 [38.31] 1.838 (‘K’) [11.86][80 x 100] 1.838 (‘K’) [11.86]

2.853 (‘L’) [18.41]

3 x Dual 4–– –– 5.938 [38.31] ––

[80 x Dual 100]

2.853 (‘L’) [18.41]

4 x 62.853 (‘L’) [18.41]

3.600 (‘M’) [23.23]

[100 x 150]3.600 (‘M’) [23.23] 6.380 (‘P’) [41.16] 9.489 [61.21]

4.340 (‘N’) [28.00]4.340 (‘N’) [28.00]

6.380 (‘P’) [41.16]

4 x Dual 6–– –– 9.489 [61.21] ––

[100 x Dual 150]

11.05 (‘Q’) [71.29]6 x 8

11.05 (‘Q’) [71.29] 16.00 (‘R’) [103.2] 20.57 [137.7] 16.00 (‘R’) [103.23][150 x 200]

18.58 (‘RR’) [119.8]4

6 x Dual 8

[150 x Dual 200]— — 20.57 [137.7] —

8 x Dual 8

[150 x Dual 200]— — 28.36 [182.9] —

8 x 10

[200 x 250]— 26.00 (‘T’) [167.7] 38.96 [251.3] 26.00 (‘T’) [167.74]

8 x Dual 10[200 x Dual 250]

— — 38.96 [251.3] —

Effective Nozzle Coefficient of

Discharge for 90% of Actual

Capacity

Service Kd

Gas 0.975

Liquid 0.650

Steam 0.975

Notes

1. Not available in 1” x 2” or 1.5” x 2” sizes.

2. There are no recognized API ‘full-bore’

orifice areas. These effective areas are

specific to Anderson Greenwood.

3. Threaded body only.

4. Series 700 is available in a non-standard

RR orifice 18.580 in2 [119.871 cm2].


32/65



Once you have determined the basic type

(e.g., Series 200, 400, etc.) of valve

required in Part 1 and determined your

required orifice area in Part 2, please refer

to the following information to specify andorder the pressure relief valve best suited

for your application.

Note: To ensure proper delivery and

expedite processing, please include

the model number and any additional

information requested below in all

specifications, purchase requisitions, and

orders, as applicable.

Constructing a Model Number

To construct the model number, identify

the seven components on the Valve Model

Numbering chart on page 52. Use theresulting assembled number when

ordering your valve.

Specifying Other

Information for Your Order

The following information might be

required, depending on the type of valve

and other requirements:

Special Requirements

Please specify the details of any special

procedures you require during valve

manufacturing.

These might include unlisted accessories,

special quality assurance, material

traceability, non-standard plating and

surface finishes, non-destructive test

requirements, etc. Include required levels

of inspection and the parties or

organizations who will perform the

inspections, if any. Note: Special

requirements can impact price and

delivery.

Valve Tagging

If paper tags are requested at the time the

valve is ordered, they will be furnished at

no additional cost. Other types of taggingare offered at additional cost. If you would

like metallic tags, please identify the

specific tag material, and tag numbers

when you place your order.

Documentation

Data submittals are not furnished for

ordered products unless specified. Certain

standard drawings, test reports, and

certifications are available at no cost,

upon request.

Packing for Shipment

All products are packed for normaldomestic shipment from point of assembly

or stocking. Special packaging

requirements, such as export boxing,

should be specified in your purchase

order.

Ordering Information

To properly process your order and avoid

delay, please specify the following:

• Quantity

• Inlet Size and Flange Rating andFacing (see page 44)

• Outlet Size and Flange Rating andFacing (see page 63)

• Anderson Greenwood Type ModelNumber (see page 52)

• Orifice Size (see page 30)

• Material Requirements(see pages 32 - 43)

– Main Valve Body

– Main Valve Trim

– Pilot

• Soft Goods (see page 44 - 50)

• Set Pressure

• Allowable Overpressure• Service (Gas, Vapor, Liquid, Steam)

• Temperature (Operating and Relief)

• Operating Pressure

• Back Pressure (ConstantSuperimposed, Variable Superimpo

and Built-up)

• Required Relief Capacity

• Molecular Weight (Gas) or SpecificGravity (Liquid)

• Ratio of Specific Heats (Gas)

• Optional Accessories(see pages 53 - 57)

– Field Test Connection

– Field Test Indicator

– Manifold Dual Pilot

– Backflow Preventer

– Pilot Supply Filter

– Pressure Spike Snubber

– Remote Pressure Sense Connect

– Remote Valve Lift Indicator

– Manual Unloader

– Pilot Lift Lever

– Remote Unloader

– NACE Option

How to Order a Valve


33/65



32

Series 200/400/500/800 - Standard Main Valve


Item Description /S1 /S1/NACE /S /S/NACE

-20°F to +1000°F1 -20°F to +1000°F1 -450°F to +1500°F1 -450°F to +1500°F1

[-29°C to +537°C1] [-29°C to +537°C1] [-268°C to +816°C1] [-268°C to +816°C1]

1 Body SA216-WCB/WCC CS SA216-WCB/WCC CS SA351-CF8M SS SA351-CF8M SS

2 Cap SA516-70 SA516-70 SA240-316 SA240-316

3 Cap Bolting A449/A325 CS A449/A325 CS A193-B8M SS A193-B8M SS

A479-316 or A479-316 or A479-316 or A479-316 or4 Nozzle

A351-CF8M SS A351-CF8M SS A351-CF8M SS A351-CF8M SS

5 PistonA564-630 (17-4 PH), A564-630 (17-4 PH), A564-630 (17-4 PH), A564-630 (17-4 PH),

A479-316 or A351-CF8M SS A479-316 or A351-CF8M SS A479-316 or A351-CF8M SS A479-316 orA351-CF8M SS

A479-316 or A479-316 or A479-316 or A479-316 or6 Liner

A351-CF8M A351-CF8M A351-CF8M SS A351-CF8M SS

7 Dipper Tube 17-4 PH SS 17-4 PH SS 17-4 PH SS 17-4 PH SS

8 Dome Spring 316 SS Not Used 316 SS Not Used

9 Tube Fittings A576 CS2 SA182-316 SS SA182-316 SS SA182-316 SS

10 Seat see page 44 see page 44 see page 44 see page 44

11 Piston Seal see page 44 see page 44 see page 44 see page 44

Nozzle A747-CB7CU-1 SS or A747-CB7CU-1 SS or A747-CB7CU-1 SS or A747-CB7CU-1 SS or12

Retainer 17-4 PH SS 17-4 PH SS 17-4 PH SS 17-4 PH SS

13 Seat Retainer A479-316 SS A479-316 SS A479-316 SS A479-316 SS

14 Seat Retainer Screw 316 SS 17-4 PH SS 316 SS 17-4 PH SS

3

8

6

13

10

12

4

9

7

92

11

5

14

1

Notes

1. Maximum temperature relates to fire case

conditions. Continuous service temperature

is limited by the choice of seat and sealmaterials.

2. SS for Series 500.


34/65



9

21

14 15

22

10

5

1

813

7

6

18

16

17

2

20

4 11 12 19

3


Item Description /S /S1 /S2 /S3

Ambient to 1000°F Ambient to 600°F 601°F to 800°F 801°F to 1000°F

[Ambient to 538°C] [Ambient to 316°C] [318°C to 427°C] [427°C to 538°C]

1 Body SA351-CF8M SS SA216-WCB CS SA216-WCB CS SA217-WC6 AS

2 Cap SA240-316 SA516-70 SA516-70 SA387-11

3 Nozzle A351-CF8M SS A351-CF8M SS A351-CF8M SS A351-CF8M SS

4 Piston Assembly A217CA-151 A217CA-151 A217CA-151 A217CA-151

5 Liner A479-410 A479-410 A479-410 A479-410

6 Stud A193-B7 A193-B7 A193-B7 A193-B7

7 Nut A194-2H A194-2H A194-2H A194-2H

8 Piston Damper A479-410 A479-410 A479-410 A479-410

9 Retainer Screw A574 A574 A574 A574

10 Dome Spring Inconel® Inconel® Inconel® Inconel®

11Damper Ring with

Ductile Iron Ductile Iron Ductile Iron Ductile IronCentralizer Spring

Piston Seal Ring with12

Centralizer SpringDuctile Iron Ductile Iron Ductile Iron Ductile Iron

13 Liner Seal GRAFOIL® GRAFOIL® GRAFOIL® GRAFOIL®

14 Seal Extrusion Ring 1018 STL 1018 STL 1018 STL 1018

15 Nozzle Seal Thermabraid SS Thermabraid SS Thermabraid SS Thermabraid SS

16 Drain Spring 316 SS 316 SS 316 SS 316 SS

17 Drain Plunger 17-4 SS 17-4 SS 17-4 SS 17-4 SS

18 Pipe Plug, Hex HD 316 SS 316 SS 316 SS 316 SS

19 Filter Assembly 316 SS 316 SS 316 SS 316 SS

20 Pitot Tube Seal GRAFOIL® GRAFOIL® GRAFOIL® GRAFOIL®

21 Belleville Washer 17-7 SS 17-7 SS 17-7 SS 17-7 SS

22 Disc 718 Nickel Alloy 17-4 SS or 718 Nickel Alloy 718 Nickel Alloy 718 Nickel Alloy

Notes

1. Inconel ® is a registered trademark of

International Nickel Company.

2. GRAFOIL ® is a registered trademark of

UCAR Carbon.

Series 700 - Standard Main Valve


35/65



34

Series 200 Pilot

11

7

8

1

19532

20

29

16

26

Supply

27

22

25

15

14

13

12

9

10

9

6

4

Dome

17

18

28

23

21

24


36/65



Series 200 Pilot


Item Description /S1, /S, /S1/NACE, /S/NACE

1 Body A479-316 SS

2 Nozzle Seal PCTFE

3 Nozzle A479 316 SS

4 Seat See Soft Goods (page 46)

5 Seat Retainer (upper) A479 316 SS

6 Spindle A479 316 SS/CR PL

7 Guide A479 316 SS

8 Bonnet Seal See Soft Goods (page 46)

9 Spring Washer A479 316 SS

10 Spring 316 SS1

11 Bonnet A479 316 SS

12 Jam Nut 316 SS

13 Pressure Set Screw A276 316 SS

14 Cap A479 316 SS2

15 Blowdown Adjustment Screw A479 316 SS

16 Blowdown Adjustment Seal See Soft Goods (page 46)

17 Seat Retainer (lower) A276 316 SS

18 Piston Seal See Soft Goods (page 46)

19 Spacer A276 316 SS

20 Reseat Seat A479 316 SS

21 Bushing Seal See Soft Goods (page 46)

22 Reseat Adjustment Bushing A479 316 SS

23 Spacer Washer 316 SS

24 Blowdown Seal Teflon® TFE

25 Jam Nut 316 SS

26 Inlet Screen 316 SS

27 Reseat Piston A276 316 SS

28 Pipe Plug A479 316 SS

29 Vent Zytel®3 /316 SS

Notes

1. For NACE trim, item 10 is Inconel ® .

2. A582 303 SS above 1480 psig [102.1 barg].

3. Zytel ® is a registered trademark of the E.I.

duPont de Nemours Company.


37/65



36

Series 400 Pilot (Gas Service)

16

17

18

15

19

6

13

12

4and42

14

41

23

7

27

11

28

5

1 29 2 30 31

13

39

38

10

20and21

40

26

35

22

24

25

3

8

Dome

34

33

32

9

12

40

22

24

25

3

39

10

36

35

26

43

44

9

3 26

39

12

301 - 740 psig

[20.8 - 51.0 barg]

741 - 1480 psig[51.1 - 102 barg]

15 - 300 psig

[1.03 - 20.6 barg]


38/65



1 Body A479-316 SS A479-316 SS

2 Body Plug A479-316 SS A479-316 SS

3 Feedback Piston A479-316 SS A479-316 SS

See Soft Goods See Soft Goods4 Sense Diaphragm

(page 44) (page 44)

5 Inlet Nozzle A479-316 SS A479-316 SS

6 Spring 17-7 SS1 17-7 SS

7 Inlet SeatSee Soft Goods

(page 44)Viton®

8 Spool Spring 302 SS Elgi loy

9 Piston Nut 316 SS 316 SS

10 Sense Washer A479-316 SS 316 SS

11 Bias Spring 316 SS Elgiloy

See Soft Goods12 Upper Piston Seal

(page 44)Viton®

13 Spring Washer A479-316 SS A479-316 SS

14 Diaphragm Case A479-316 SS A479-316 SS

15 Spring Bonnet A351-CF8M SS A351-CF8M SS

16 Adjustment Screw A276-316 SS A276-316 SS

17 Jam Nut A479-316 SS A479-316 SS

18 Cap A582-303 SS A582-303 SS

19 Bonnet Vent Zytel® Zytel®

20 Case Bolt A193-B8M SS2 A193-B8M SS2

21 Body Bolt A193-B8M SS2 A193-B8M SS2

See Soft Goods22 Case/Liner Seal

(page 44)Viton®

23 Bushing A26-316 SS A276-316 SS

24 Piston Sleeve A479-316 SS A479-316 SS

See Soft Goods25 Sleeve/Case Seal

(page 44)Viton®

Notes

1. 316 SS for set pressure range 15 – 65 psig [1.03 – 4.48 barg].

2. 302SS for set pressure range 501– 1480 psig [34.5 – 102.1 barg].

3. Viton ® is a registered trademark of the E.I. duPont de Nemours

Company.

See Soft Goods26 Lower Piston Seal(page 44)

Viton®

See Soft Goods27 Inlet Nozzle Seal

(page 44)Viton®

A564-630 A564-63028 Outlet Nozzle

(17-4PH) SS (17-4PH) SS

Upper Outlet See Soft Goods29

Nozzle Seal (page 44)Viton®

See Soft Goods30 Body Plug Seal

(page 44) Viton®

See Soft Goods31 Spool Seal

(page 44)Viton®

Lower Outlet See Soft Goods32

Nozzle Seal (page 44)Viton®

See Soft Goods33 Outlet Seat

(page 44)Viton®

34 Spool A479-316 SS A479-316 SS

Diaphragm35

Retainer WasherA479-316 SS A479-316 SS

Diaphragm36

Support PlateA479-316 SS A479-316 SS

38 Sense Plate A479-316 SS A479-316 SS

39 Lock Washer A479-316 SS A479-316 SS

See Soft Goods40 Diaphragm Seal

(page 44)Viton®

See Soft Goods41 Body/Case Seal

(page 44)Viton®

42 Diaphragm Shield Teflon®-FEP Teflon®-FEP

43 Sense Piston A479-316 SS A479-316 SS

See Soft Goods44 Piston Sense Seal

(page 44)Viton®

Series 400 Pilot


Item Description /S1, /S /S1/NACE, /S/NACE Item Description /S1, /S /S1/NACE, /S/N


39/65



38

Series 500 Pilot

12

24

13

31

30

17

18

25

14

35and 32

16

6

35and 32

9

26

21

4

28

2

1

23

10

11

3

19

7

34

22

5

29and33

8

20

15

27

7

8

9

275 - 720 psig

[19.0 - 51.0 barg]


40/65



Series 500 Pilot


Item Description /S1, /S, /S1/NACE, /S/NACE

1 Body A351 GR. CF8M

2 Nozzle A479-316 SS

3 Spindle A276-316 SS

4 Socket/Seat A479-316 SS

5 Diaphragm Support Plate A479-316 SS

6 Spacer Ring A479-316 SS

7 Sense Plate A479-316 SS

8 Boost Plate A479-316 SS

9 Diaphragm Shield A240-304 SS

10 Bonnet A351-CF8M SS

11 Spring Washer A479-316 SS

12 Pressure Adjustment Screw A276-316 SS

13 Bonnet Insert SA564-670 (17-4) SS

14 Bonnet Seal BUNA-N

15 Spindle Seal Teflon®-TFE1

16 Plate Boost Seal Teflon®-TFE

17 Spring 316 SS2

18 Bonnet Vent Aluminum

19 Lock Washer3 316 SS

20 Shim Washer 18-8 SS4

21 Retainer Screw 18-8 SS5

22 Bolt 17-4 SS PH

23 Cap A582-303 SS

24 Jam Nut A479-316 SS

25 Jam Nut 18-8 SS

26 Seal Retainer A479-316 SS

27 Seat PEEK

28 Ball 316 SS6

29 Diaphragm Teflon®-FEP Type L7

30 Nameplate A240-304 SS

31 Drive Screw 304 SS

32 Gasket3 Teflon®-TFE

33 Diaphragm Hastelloy®8

34 Spindle Gasket Teflon®-FEP

35 Gasket PEEK9

Notes

1. Carbon filled Teflon ® -TFE seal Hastelloy ®

spring loaded.

2. 316 SS used 60 psig [4.14 barg] and

below, 17-7 SS used 61 – 720 psig

[4.21 -49.6barg].

3. Used 180 psig [12.4 barg] and below.

4. 316 SS Annealed for NACE.

5. Monel ® for NACE

6. Hastelloy ® C for NACE.

7. Upper and lower diaphragm, 15 – 30 psig

[1.03 – 2.07 barg], lower diaphragm only,

31 – 120 psig [2.14 – 8.27 barg].

8. Upper diaphragm only 31 – 120 psig [2.14

– 8.27 barg], upper and lower diaphragm,

121 – 720 psig [8.34 – 49.6 barg].

9. Used above 180 psig [12.4 barg].

10. Hastelloy ® is a registered trademark of

Haynes International.


41/65


42/65



Note

1. ALYMP35N ® is a registered trademark of

SPS Technologies, Inc.

Series 700 Pilot


Item Description /S1, /S2, /S3, /S

1 Body SS A479-3162 Lift Lever Bonnet SS A479-316

3 Cap SS A479-316

4 Spring Washer SS A479-316

5 Adjusting Screw SS A479-316

6 Hex Jam Nut SS 316

7 Spring Inconel® X750

8 Spindle SS 17-4

9 Disc SS 17-4

10 Nozzle SS 17-4

11 Nozzle Seal GRAFOIL® /SST

12 Reseat Seat SS 17-413 Spacer SS 17-4

14 Cage Guide SS A479-316

15 Reseat Piston SS 17-4

16 Blowdown Adjustment Bushing SS A479-316

17 Thread Seal GRAFOIL®

18 Blowdown Adjustment Nut SS A479-316

19 Blowdown Adjustment Packing GRAFOIL®

20 Safety Lock Screw SS 18-8

21 Blowdown Adjustment Screw SS A479-316

22 1 / 2 NPT Pipe Plug SS A479-316

23 Vent Aluminum24 Shim SS 316

25 Lever SS 316

26 Torsion Spring SS 316

27 O-ring Teflon®

28 Lock Washer SS 18-8

29 Roll Pin SS 420

30 1 / 4-28 x 1 / 4 Bolt SS 18-8

31 Cam SS 316

32 Gland Nut SS A479-316

33 Gag Rod SS 300 or 4130 Alloy Steel

34 Gag Rod Lever SS 18-835 Bolt SS A193-B8M

36 Ball SS 440C

37 Disc Spring Washer ALYMP35N®

38 Bonnet Spring Washer SS 17-4

39 Adjustment Screw Retainer SS 17-4

40 Stop Pin SS 18-8

41 Packing Retainer SS 316

42 Blowdown Adjustment Sleeve SS 17-4


43/65



42

18

20

21

14

22

24

15

10

29

4

27

28

1

17

16

5

19

19

13

11

23

12

6

9

30

8

25

26

3

7

2

Series 800 Pilot


44/65



Series 800 Pilot


Item Description /S1, /S /S1/NACE, /S/NACE

1 Body A564-630 H1150 17-4 SS A564-630 H1150 17-4

2 Inlet Bushing A564-630 H1150 17-4 SS A564-630 H1150 17-4

3 Outlet Nozzle A564-630 H1150 17-4 SS A564-630 H1150 17-4

4 Inlet Nozzle A564-630 H1150 17-4 SS A564-630 H1150 17-4

5 Bonnet A351-CF8M SS A351-CF8M SS

6 Bonnet Lock Bolt 316 SS 316 SS

7 Inner Spool A564-630 H1150 17-4 SS A564-630 H1150 17-4

8 Outer Spool A564-630 H1150 17-4 SS A564-630 H1150 17-4

9 Spool Nut A564-630 H1150 17-4 SS A564-630 H1150 17-4

10 Feedback Piston A564-630 H1150 17-4 SS A564-630 H1150 17-4

11 Sense Piston A564-630 H1150 1 7-4 SS A564-630 H1150 17-4

12 Feedback Spacer A269-316 SS A269-316 SS

13 Lock Washer 316 SS 316 SS

14 Hex Nut A194-8M

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