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Choke Valves

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CV 4-03092 Weir Power & Industrial First choice for power and industrial protection

IntroducingWeir Power & Industrial

Further technical information can be obtained from

our Web site: http://www.weirpowerindustrial.com

Weir Power & Industrial provides critical service and

safety valves, specialist pumps and service support toflow control and rotating equipment. Our world-wide

reputation is based on engineering excellence applied

to a comprehensive range of specialist products andeffective customer support.

We have the capability to deliver complete valve

solutions for major projects in the power generation,oil and gas exploration and general industrial sectors.

Our global network of service operations specialise in

the maintenance, upgrade and management of powerand industrial assets at customer sites.

Quality assurance

Weir Power & Industrial operates quality

programmes to cover the full scope of their

activities. Comprehensive quality systems have

been developed to serve the power, oil and gas

and industrial markets which they serve.

The company holds approvals to:

ASME Section III N, NPT

BS EN ISO 9001:2000

API Q1 TO API LICENCES API 6D (6D-0182) ANDAPI 6A (6A-0445)

The Quality systems have been approved for the

supply of products to meet the requirements of

the Pressure Equipment Directive (PED) and

compliance modules A,D1,H,B&D have been

applied in categories I through IV respectively.

The company is committed to compliance with

legislation and has an established environment

and health and safety policy.

Material testing service available

Non-destructive examination by radiography,

ultrasonics, magnetic particle and liquid

penetrant.

Chemical analysis by computer controlled direct

reading emission spectrometer.

Mechanical testing for tensile properties at

ambient and elevated temperatures, bend and

hardness testing. Charpy testing at ambient,elevated and sub-zero temperatures.

6A-04456D-0182

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CV 4-0309 3Weir Power & Industrial First choice for power and industrial protection

Contents

ASME B16.34 4

API 6A High duty/subsea 5

Application 6

Selection guidelines 7 - 8

Dimensions 9

Weir Power & Industrial UK purpose built factory at Elland.

The Control Valve business unit have designed and

manufactured valves for in excess of 50 years. Their

control valve product range offers an extensive choice

in terms of size, pressure class, body/trim materials,

and includes top, top & bottom guided and cage

guided valves. In addition they also supply a wide

range of desuperheating equipment to satisfy power

and steam conditioning applications.

Above: Manufacturing

facilities at Elland.

Left: Valve testing.

Valve testing facilities

All pressure containing items are hydrostatically

tested, seat leakage tested and functionally tested.

In addition, gas, packing emission, cryogenic and

advanced functional testing can be arranged.

BLAKEBOROUGH

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Stem packing system


Blakeborough ControlsASME B16.34 CHOKE VALVE

Description

The body/bonnet seal is a high integrity metallic C

seal. The seal loading is obtained from high duty

bolting designed to ASME VIII during installation

and is pressure energised by the process fluid.

The trim design is cage guided with either solid or

balanced plug design. The cage and seat are

clamped into the body to give easy access and easy

removal. The cage can house from 1 to 3 pressure

reducing sleeves.

The packing system incorporates a scrapper ring to

prevent the ingress of sand to the stem seal. The

stem seal is specially designed low emission packing

incorporating 3 self/pressure energised U seals.

As a minimum seat faces are stellited however, for

high service chokes the plug and seat will normallybe manufactured from tungsten carbide or

advanced ceramic. On single phase clean services

the seat/plug faces are tapered. On multi-phase

duties and contaminated services a shrouded seat

design is used to protect the seat faces from the

erosive flow. This design directs the flow

impingement away from the valve plug seating face,

and the increased deadband and direction of flow

protects the valve.

Features

Designed to ASME B16.34

Cast body - Carbon steel, Stainless Steel &Duplex st. st.

High integrity body/bonnet bolting system

Seat retained by cage for ease of maintenance

Large range of single stage and multi-stage trim

designs

Pressure Rating

ANSI 900 - ANSI 4500

Sizes

2 - 8

End Connections

Flanged RF RTJ Hubbed

Actuation (Linear)

Manual

Pneumatic (Diaphragm/Piston)

Electric

Electro/Hydraulic

Actuation (Stepping)

Pneumatic

Hydraulic

The standard ASME B16.34 range of choke valves

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Blakeborough Controls API 6 A HIGH DUTY / SUBSEA CHOKE VALVE

Description

The body/bonnet seal is a clamped connection with

a hub style seal ring. Sealing integrity is enhanced

by applying an inconel overlay to the body and

bonnet sealing areas on carbon steel valves.

The trim arrangement is a cage guided design

available in both solid and balanced configuration.

On sub-sea designs the trim is attached to the

bonnet forming a cartridge, simplifying retrieval for

maintenance.

The packing system incorporates a series of stem

scrapper rings to prevent the ingress of sand to the

stem seal. The stem seal is specially designed low

emission packing incorporating 3 self/pressure

energised U seals.

As a minimum seat faces are stellited, however, for

high service chokes the plug and seat will normally

be manufactured from tungsten carbide or

advanced ceramic. On single phase clean services

the seat/plug faces are tapered. On multi-phase

duties and contaminated services a shrouded seat

design is used to protect the seat faces from the

erosive flow, see protected seating detail opposite.

This design directs the flow impingement away from

the valve plug seating face, and the increased

deadband and direction of flow protects the valve.

Features

Designed to API 6A

Forged or Cast body - Carbon steel, Stainless

Steel & Duplex st. st.

High integrity clamped body/bonnet connection

Cartridge trim on sub-sea designs for ease of

retrieval

Extensive range of trim options

Pressure Rating

API 3000 - 10000

Sizes

2116 - 7116

End Connections

Flanged RTJ Hubbed

Actuation (Topside)

Manual

Pneumatic

Electric

Electro/Hydraulic

Actuation (Subsea)

Manual

Hydraulic (Stepping)

Cartridge trim arrangement

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Blakeborough ControlsCHOKE VALVE APPLICATION

Choke valves are required to handle some of the

most severe operating conditions:- pressure drops

of up to 500 bar, with erosive fluid mixtures of

hydrocarbon liquids, hydrocarbon gases, sea waterand sand.

The problems associated with this application are

flow erosion to the valve body, valve trim and the

downstream pipework, vibration and noise. The

range of products used on this application range

from the bean type choke with a fixed area, to

needle and seat designs which are high recovery

and multistage trims.

Consider a fluid passing through a simple orifice

(bean) choke. Under high pressure drop conditions

the fluid pressure drops rapidly below its vapour

pressure thereby producing vapour bubbles. As the

fluid recovers downstream of the orifice either

cavitation or flashing can occur depending on

whether the downstream pressure is higher or

lower than the fluid vapour pressure. If the pressure

is lower than the vapour pressure, flashing occurs,

and this can cause erosion damage in the

downstream pipework. If the downstream pressure

is higher than the vapour pressure then as the

pressure recovers vapour bubbles formed during

the throttling process are no longer in equilibrium

and will collapse (or implode) resulting in very high

forces being generated. This energy release can

result in significant erosion damage, and extensive

noise and vibration problems. On high recoverydesigns and on severe applications whole sections

of metal can be eroded away, affecting the pressure

integrity of the valve body and downstream

pipework.

On gas f lows high uncontrolled velocities can result

in shock waves/turbulence interaction leading to

high noise levels and vibration problems.

Flashing damage

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Blakeborough Controls CHOKE VALVE SELECTION

Choke Valve Selection Guidelines

When specifying choke valves it is critical that the

correct size, trim design and materials are selected

to ensure a satisfactory life and operation of the

valve.

Our philosophy is to control the energy dissipation

within the valve and not to pass the problem on to

the downstream pipework.

In the selection process the following considerations/

calculations are made and recommended limits on

velocity and pressure drop for trim material

followed.

Cavitation Index

Used on liquid service applications to indicate

potential for cavitation. A positive value indicatescavitation. It is normally recommended to eliminate

cavitation, however, for intermittent use a low level,

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Blakeborough ControlsCHOKE VALVE SELECTION

Body Size Trim Size Metallic Trim Carbide Trim

(ins) (ins) MF MFP CS2 CS3 PMF MF MFP CS2 CS3 PMF

112 112 12 9 8 7 - 9 7 8 7 -

112 38 35 24 12 35 38 35 24 12 35

212 112 38 35 24 12 35 38 35 24 12 35

212 70 65 40 10 65 65 61 40 10 65

312 212 70 65 40 10 65 65 61 40 10 65

312 150 138 72 36 138 140 130 72 36 138

412 312 150 138 72 36 138 140 130 72 36 138

412 230 200 96 48 200 220 188 96 48 200

512 412 230 200 96 48 200 220 188 96 48 200

512 360 350 144 72 350 340 327 144 72 350

Table 4 - Design Cv values

Service Body Trim

Standard Carbon St. WCB or AISI 4130 316 & stellite Gr. 6

Sour Carbon St. WCB or AISI 4130 (Nace) 316 & stellite Gr. 6 (NACE)

Corrosive sour Carbon St. WCB or AISI 4130 + 316 & stellite Gr. 6 (NACE)

inconel in seal area

ASTM A182 F316

High duty production Carbon St. WCB or AISI 4130 17-4 PH & tungsten carbide

High duty production with Carbon St. WCB or AISI 4130 17-4 PH & tungsten carbide with

contaminates protected seat design

High duty production with Carbon St. WCB or AISI 4130 + Duplex st.st./super duplex st.st. &

contaminates, sour inconel, Duplex St.St. tungsten carbide with protected

Super Duplex St.St seat design

Water Injection Carbon St. WCB or AISI 4130 316 & stellite Gr. 6 Water Injection - high duty Carbon St. WCB or AISI 4130 + 316 & stellite Gr. 6 (NACE) &

inconel in seal area tungsten carbide/advanced ceramics

St. St. CF8M or Duplex St. St.

Table 6 - Materials of Construction

Body Size Available End Connections

(ins) API (ins) ANSI (ins)

3000 - 10000 900 1500 2500 4500

112 2116 2 2 2 3

212 318 3 3 3 & 4 4

312 4116 4 & 6 4 & 6 4 & 6 6

412 518 6 & 8 6 & 8 6 & 8 8

512 7116 6 & 8 6 & 8 8 8

Table 5 - End connection sizes

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Blakeborough Controls DIMENSIONS

Nominal End End Connections Rating

Connection ANSI 900 ANSI 1500 ANSI 2500

(ins) F M F M F M

2 7116 7 718 7 878 7

3 8316 778 8916 7716 1034 11

4 95

16 91

16 911

16 97

15 1313

16 131

4

6 1214 15 131516 1414 1834 1558

8 14916 1514 14916 16 CF CF

Table 7 - ANSI Outline dimensions

Nominal End End Connections Rating

Connection API 3000 API 5000 API 10000

(ins) F M F M F M

2116 918 8 938 8 1078 1018

318 1018 978 1058 978 1138 1214

4116 12116 13 12716 13 1378 1378

518 1418 1478 1438 1478 1818 1518

71

16 171

16 171

4 171

4 171

4 CF CF

Table 8 - API Outline dimensions

For dimensions of ANSI 4500 Choke valves consult factory CF = consult factory

M

F

F

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Blakeborough ControlsAPPLICATIONS

29 Choke valves supplied to Kalanaft

150mm ANSI 900.

Carbon Steel WCB body.

17-4 PH St. St. Trim with Tungsten Carbide coating.

Used on an Oil/Gas application with a 1130 psi (78 bar)

pressure drop.

50mm API 5000 Subsea Choke supplied to Mazagon

Dock for an Injection Water application.

4 Choke valves for BP Colombia with electro hydraulic actuators

71/16 API 10000.

Duplex St. St. (UNS 31803) body.

17-4 PH solid Tungsten Carbide, 4-stage Trim.

Used on a Produced Water application with a 4300 psi (297 bar)

pressure drop.8 Choke valves for Hyundai Heavy Industries, Korea

100mm ANSI 900 St. St. CF3m, with 17-4 PH St. St. Trim with

Tungsten Carbide coating.

Used on a Natural Gas application.

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Blakeborough Controls CHOKE VALVES

Product Portfolio

The following list identifies the product range for

Blakeborough Controls business unit.

For further information please contact our factory.

Globe & Angle Control valves

Severe service valves

Desuperheaters

Choke valves

Project Name & Name Valve Size Rating Qty Line fluid Pressure Body/Trim material

& Location of Client drop

Caythorpe

Kelt V.K. Ltd 80 mm ANSI 1500 1 Gas/Condensate/Sand 234 bar A105, 17-4 / ceramic

Transmark / Maersk 80 mm ANSI 2500 1 Raw Gas (sour) 245 bar Tungsten Carbide

Tyne & Trent, ARCO 25 mm (h) ANSI 1500 3 Produced Water 118 bar UNS S31803/Ceramic

25 mm (h) ANSI 1500 2 H.C. Condensate 111.4 bar UNS S31803/Ceramic

40 mm (h) ANSI 1500 5 Water 101.2 bar UNS S31803/Ceramic

ETAP, BP Aberdeen (*) 80 mm ANSI 2500 1 Produced Water 354 bar Gr F 60/Ceramic

80 mm ANSI 2500 1 Deaerated Seawater 399 bar Gr F 60/Ceramic

50 mm API 10000 1 Well Stream Fluids 503 bar GrF51/Ceramic

100 mm API 10000 1 Well Stream Fluids 531 bar Inconel/Ceramic

80 mm (h) ANSI 1500 1 Produced Water 35 bar Duplex

200 mm (h) ANSI 1500 2 Hydrocarbon/Liquid/Sand 53 bar Duplex/Tungsten Carbide

80 mm ANSI 2500 3 Produced Water 350 bar F60/Ceramic

Marathon Brae 25 mm API 10000 1 Methanol 680 bar 316 L + Ceramic

Panaqua

ONGC - India 80 mm ANSI 900 32 Produced Water 103 bar WCB/Tungsten Carbide

KOC - Kuwait 150 mm API 5000 16 Produced Water 60 bar 316 L/Stellite

CRMP 1 - India 50 mm API 5000 2 Injection Water 40 bar AISI 4130 Tungsten Carbide

Mazagon Dock (sub sea)

Gupco - Egypt 150 mm ANSI 900 2 155 bar WCB/Stellite

Lakshimi - Hyundai 100 mm ANSI 900 8 Natural Gas 8 bar CF3M/17-4 PH + T.C. Coat.

Kala Naft - Iran 150 mm ANSI 900 29 Oil/Gas 78 bar WCB/17-4 PH + T. C Coat.

Lasmo Oil - Pakistan 100 mm ANSI 900 2 Natural Gas/Liquid 39 bar CF8M/410 + T. C. Coating

Lasmo Oil - Pakistan 150 mm ANSI 900 6 Natural Gas/Liquid 21 bar CF8M/410 + T. Coating

BP Columbia 7.1/16 API 10000 4 Produced Water 297 bar Duplex/17-4PH + Tung.Carbide

Shell Na Kika - LTS 50 mm API 10000 2 Natural Gas 358 bar 660 St. St./316 + T. C. Coating

Examples of Choke Valves Supplied by Blakeborough

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12 Weir Power & Industrial First choice for power and industrial protection

Blakeborough ControlsWEIR POWER & INDUSTRIAL CATALOGUES

CV 4-0309

HopkinsonsGate, Globe & Special

Purpose Valves

BlakeboroughChoke Valves

Batley ValveIsolation & Control Butterfly

Valves

BlakeboroughX-Stream Control Valves

SebimNuclear Pilot Operated SafetyRelief Valves

MAC ValvesValve Product Range

Sarasin-RSBDSafety Relief Valves -

Starflow

Sarasin-RSBDSpring Loaded Safety Relief

Valves - 63 Series

MAC ValvesRotary Gate & Dosage Valves

Sarasin-RSBDSafety Relief Valves -

Series 9

BlakeboroughProcess Control Valves

Sarasin-RSBDHopkinsonsSafety Valves - A7000 Series

HopkinsonsShell Boiler Mountings

Sarasin-RSBDChangeover Valves - Starvalve

TricentricTriple Offset Butterfly Valves

Atwood & MorrillEngineered Valve Products &

Solutions

Sarasin-RSBDPilot Operated Safety Relief

Valves - 71, 76, 78 & 86 Series

Sarasin-RSBDTank Blanketing System

Starblanketer - 77 Series

Sarasin-RSBDTechnical Information Sarasin-RSBDPressure Safety Valves &Safety Devices

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13Weir Power & Industrial First choice for power and industrial protection

Blakeborough Controls WEIR POWER & INDUSTRIAL CATALOGUES

CV 4-0309

Weir Power &Industrial ServicesComprehensive Coatings

Service Provider to Industry

Weir Power &IndustrialMulti Stage Flash Desalination

Plant System

Weir Power &IndustrialCombined Cycle Power

Plant System

Weir Power &IndustrialFossil Fuel Power Plant System

Roto-jet PumpHigh Pressure Pumps -

Models R11, API R11 & RD11


Models RG & RO

Wemco PumpWemco Hidrostal Pumps

WemcoHydrogritter


Models 2100 & 2200

Wemco PumpTorque-Flow Pumps

Wemco PumpWemco Submersible Pumps

Wemco Self PrimerSelf Primer

Wemco PumpModel CF Chop-Flow Pump

Weir Power &

Industrial ServicesTurbomachinery Engineering

Solutions

Weir Power &

Industrial ServicesPower Generation Solutions

Weir Power &

Industrial ServicesCentrifugal Pumps

Weir Power &

Industrial ServicesUpgrading Power Plant &

Processes

Weir Power &

Industrial ServicesHydroelectric Plant

Rehabilitation

Weir Power &Industrial ServicesHigh Integrity Spare Parts

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14 Weir Power & Industrial First choice for power and industrial protection

Blakeborough ControlsNOTES

CV 4-0309

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15Weir Power & Industrial First choice for power and industrial protection

Blakeborough Controls NOTES

CV 4-0309

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Britannia HouseHuddersfield RoadElland, West YorkshireHX5 9JR England

Tel: +44 (0) 1422 282 000Fax: +44 (0) 1422 282 100Email: [email protected]

ExcellentPower & Industrial

Solutions

Weir Power & Industrial

CV

4-0309

choke valve 3 120309

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