Emerson T205, T208 Data Sheet
T205 and T208 Series
Tank Blanketing Regulators
• Specifi cally designed for pressure-sensitive tank blanketing applications
• Direct-operated for quick response to tank pressure changes
• Internal or external pressure sensing for application fl exibility
Introduction
The T205 and T208 Series are direct-operated, tank
blanketing regulators. The T205 Series are pressure
reducing regulators, while the T208 Series are pressure
relief regulators. Together, these regulators provide
precise tank blanketing pressure control.
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, signifi cant 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.
$40,000
$35,000
$30,000
$25,000
$20,000
$15,000
$10,000
$5,000
Nitrogen Cost Per Tank Per Year
Application
These regulators have been specifi cally designed for
tank blanketing applications. In tank blanketing, a gas
such as nitrogen is brought into the tank in order to
inert the vapor space above the liquid. This application
is characterized by low pressure. The T205 and
T208 Series are able to maintain very low pressure
setpoints and respond to very small changes in pressure.
Nitrogen Cost vs. Leak Diameter
Blanketing Setpoint
7-inches w.c. /
17.5 mbar
2-inches w.c. /
1-inches w.c. /
2.5 mbar
3/4-inches w.c. /
1.9 mbar
1/2-inches w.c. /
$0
1/4 inch / 1/2 inch / 3/4 inch / 1 inch /
6.4 mm 12.7 mm 19.1 mm 25.4 mm
Nitrogen Escape Path Ð Effective Leak Diameter
1.2 mbar
5 mbar
www.emersonprocess.com/regulators
T205 and T208 Series
Tank Blanketing Regulators
7 different springs
available to
customize pressure
control setting
Optional External sensing
for most accurate
pressure control
INLET PRESSURE
OUTLET PRESSURE
ATMOSPHERIC PRESSURE
7 different springs
available to
customize pressure
control setting
Lever design provides increased lockup
force without extra cost and size
TYPE T205
Large diaphragm size
to sense very small
pressure changes
Large diaphragm size
to sense very small
pressure changes
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.
• Sizes: 3/4 and 1 inch
• 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 / 13.8 bar
• Control Pressure Range:
1 inch w.c. to 7 psig /
2 mbar to 0.48 bar
• Trim Materials: FEP, NBR, FKM,
FFKM, EPDM
Quality Assurance
Distinctive diamond shape cast
into spring case uniquely identifi es
Optional External sensing
for most accurate
pressure control
INLET PRESSURE
OUTLET PRESSURE
ATMOSPHERIC PRESSURE
Lever design provides increased lockup
force without extra cost and size
the product as part of the
Fisher® brand and assures you of
the highest-quality engineering,
durability, performance,
and support.
TYPE T208
Industrial Regulators
Emerson Process Management Regulator Technologies, Inc.
3200 Emerson Way
McKinney, Texas 75070 USA
Tel: +1 800 558 5853
Outside U.S. +1 972 548 3574
For further information, visit www.fisherregulators.com
D352121X012 © 2013 Emerson Process Management Regulator Technologies, Inc. All rights reserved. Printed in the U.S.A. 09/13.
Fisher, Emerson Process Management, and the Emerson Process Management design are marks of one of the Emerson Process Management group of companies.
All other marks are the property of their respective owners.
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