Introduction

The Type T205 is a direct-operated, internally balanced regulator. This balanced design allows for greater fluctuations in inlet pressure, as well as much greater flow capacity. Higher flow has become increasingly important as updated tank blanketing sizing guidelines* often result in greater flow requirements. * Such as API 6th Edition 2009 and ISO 28300 2008

Type T205

Balanced Tank Blanketing Regulator

Application

The Type T205 regulator has been specifically designed for tank blanketing applications. In tank blanketing, a gas such as nitrogen in brought into the tank in order to inert the vapor space above the liquid. This application is characterized by low pressure. The Type T205 is able to maintain very low pressure setpoints and respond to very small changes in pressure.

The Type T205 features a patent-pending balanced trim design. This unique design allows the regulator to achieve much higher flow capacities than traditional designs. It is less susceptible to pressure fluctuations that can originate from the blanketing gas supply - thus delivering more accurate performance.

Patent-Pending Balanced Trim Design

Balanced Tank Blanketing Regulator

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D352027X012 © 2013, 2019 Emerson Process Management Regulator Technologies, Inc. All rights reserved. 09/19. The Emerson logo is a trademark and service mark of Emerson Electric Co. All other marks are the property of their prospective owners. Fisher™ is a mark owned by Fisher Controls International LLC, a business of Emerson Automation Solutions.

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A variety of trim materials are available, designed to withstand the toughest tank environments.

Durable casing and body, designed for many years of service. Available in 316L stainless steel for greater chemical resistance.

Large diaphragm size to sense very small pressure changes

7 different springs available to customize pressure control setting

Optional External sensing for most accurate pressure control Lever design provides increased lockup

force without extra cost and size

TYPE T205

INLET PRESSUREOUTLET PRESSUREATMOSPHERIC PRESSURE

• Sizes: 3/4 and 1 in.• Body and Casing Materials: Cast Iron, Steel, Stainless steel (316L)• End Connections: NPT, CL150 RF, CL300 RF, PN 16/25/40• Maximum Inlet Pressure: 200 psig• Control Pressure Range: 1 in. w.c. to 7 psig • Trim Materials: FEP, NBR, FKM, FFKM, EPDM

Nitrogen Cost vs. Leak Diameter

Nit

roge

n C

ost P

er T

ank

Per Y

ear Blanketing Setpoint

7 in. w.c. /

2 in. w.c. /

1 in. w.c. /

3/4 in. w.c. /

1/2 in. w.c. /

17.5 mbar

5 mbar

2.5 mbar

1.9 mbar

1.2 mbar

$40,000

$35,000

$30,000

$25,000

$20,000

$15,000

$10,000

$5,000

$01/4 in. / 1/2 in. / 3/4 in. / 1 in. /6.4 mm 12.7 mm 19.1 mm 25.4 mm

Nitrogen Escape Path Ð Effective Leak Diameter

By introducing the least amount of gas required into a tank, the volume of gas that escapes through poorly sealed vents and other paths is reduced. In this way, significant blanketing gas costs can be saved. In order to accomplish this, a regulator that can sense very low pressures, such as the Type T205, is required.

Best in Class Flow Capacity

Inlet Pressure, psig

Flow

Cap

acit

y (S

CFH

) 12000

10000

8000

6000

4000

2000

0

40201052 60 80 100125 150

T205 Other Regulators

• Patent-pending design for superior flow and pressure management

• Specifically designed for pressure-sensitive tank blanketing applications

• Self-operated for quick response to tank pressure changes * Based on published data of leading competitors

The distinctive diamond shape cast into every spring case uniquely identifies the regulator as part of the Fisher™ brand and assures you of the highest-quality engineering, durability, performance and support.