T205B
www.emersonprocess.com/regulators
• Patent-pending design for superior fl ow and pressure management
• Specifi cally designed for pressure-sensitive tank blanketing applications
• Self-operated for quick response to tank pressure changes
Best in Class Flow Capacity
Inlet Pressure, psig
Flow Capacity (SCFH)
Introduction
The Type T205B is a direct-operated, internally balanced
regulator. This balanced design allows for greater
fl uctuations in inlet pressure, as well as much greater
fl ow capacity. Higher fl ow has become increasingly
important as updated tank blanketing sizing guidelines*
often result in greater fl ow requirements.
* Such as API 6th Edition 2009 and ISO 28300 2008
Balanced Tank Blanketing Regulator
Application
The Type T205B regulator has been specifi cally 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 TypeT205B is able
to maintain very low pressure setpoints and respond to
very small changes in pressure.
The TypeT205B features a patent-pending
balanced trim design. This unique design
allows the regulator to achieve much
higher fl ow capacities than traditional
designs. It is less susceptible to pressure
fl uctuations that can originate from the
blanketing gas supply - thus delivering
more accurate performance.
Patent-Pending Balanced Trim Design
T205B
Other Regulators
12000
10000
8000
6000
4000
2000
0
40
20
10
5
2
60
80
100
125
150
* Based on published data of leading competitors
T205B
D352027X012 © 2013 Emerson Process Management Regulator Technologies, Inc. All rights reserved.
Printed in the U.S.A. 04/13. 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.
USA - Headquarters
McKinney, Texas 75069-1872 USA
Tel: 1-800-558-5853
Outside U.S. 1-972-548-3574
Industrial Regulators
Emerson Process Management Regulator Technologies, Inc.
For further information, visit www.fisherregulators.com
Our Global Product Brand:
Asia-Pacific
Shanghai, China 201206
Tel: +86 21 2892 9000
Middle East and Africa
Dubai, United Arab Emirates
Tel: +971 4 811 8100
Europe
Bologna, Italy 40013
Tel: +39 051 4190611
Distinctive diamond shape cast
into spring case uniquely identifi es
the product as part of the
Fisher
®
brand and assures you of
the highest-quality engineering,
durability, performance,
and support.
• Sizes: 3/4” and 1”
• 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 inch w.c. to 7 psig
• Trim Materials: FEP, NBR, FKM,
FFKM, EPDM
Balanced Tank Blanketing Regulator
Durable casing and body, designed
for many years of service. Available
in 316L stainless steel for greater
chemical resistance.
New
1/2-inch
Airset
Large diaphragm size
to sense very small
pressure changes
7 different springs
available to
customize pressure
control setting
External sensing
for most accurate
pressure control
Lever design provides increased lockup
force without extra cost and size
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 T205B,
is required.
Quality Assurance
A variety of trim materials are available,
designed to withstand the toughest
tank environments.
Nitrogen Cost vs. Leak Diameter
Nitrogen Cost Per Tank Per Year
Blanketing Setpoint
7-inches w.c.
2-inches w.c.
1-inches w.c.
3/4-inches w.c.
1/2-inches 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
$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
