Emerson CSB400 Data Sheet
CSB400 Series
Fisher®Commercial Service Reliability
CSB400 Series
The Fisher® CSB400 Series
The CSB400 Series direct-operated, spring-loaded
regulators have been engineered to t a multitude
of pressure-reducing applications in commercial and
industrial installations. Constructions are available with
Internal, External, or Dual Registration. This balanced
trim regulator is available with control ranges from
17 mbar to 3,0 bar / 7-inches w.c to 43.5 psig. The
CSB400 Series also offers multiple overpressure
protection options, which include an integral
Slam-shut, Integral True-Monitor ™, and also a Token
Relief for relieving minor overpressure conditions.
Typical CSB404 Regulator with
Slam-shut Internal View
Product advantages:
• New technologies in overpressure protection
• Wide variety of body sizes and end connections
• Only standard tools required for pressure adjustment
and orice removal
• Platform breadth and application coverage
• Highly congurable
• Lower cost of ownership/reduced time and expense for
• Training
• Installation
• Maintenance
Type CSB403IT with True-Monitor™, Internal Pressure
Registration, and Token Relief
M1145
INLET PRESSURE
March 2009
CSB400 Series
Type CSB404ET with Slam-Shut Module, External Pressure
Registration, and Token Relief
M1146
INLET PRESSURE
OUTLET PRESSURE
ATMOSPHERIC PRESSURE
March 2009
CSB400 Series
Overpressure Protection Options
Type CSB403IT with True-Monitor™, Internal Pressure
Registration, and Token Relief
INLET PRESSURE
OUTLET PRESSURE
ATMOSPHERIC PRESSURE
March 2009
CSB400 Series
INTEGRAL MONITOR PRIMARY REGULATOR
INLET PRESSURE
OUTLET PRESSURE
ATMOSPHERIC PRESSURE
Integral True-MonitorTM Protection
Combines the operation of a conventional two-regulator
wide-open monitor set into one device.
SLAM-SHUT REGULATOR
TYPE CSB404TYPE CSB403
Slam-Shut
Shuts off gas service to the downstream system in the
event of an overpressure or underpressure condition.
CSB400 Series Features
Operation: Direct-Operated, Pressure Reducing
Body Size: NPS 1, 1-1/4, 1-1/2, 2 NPT;
NPS 1, 1-1/4, 1-1/2, 2 ISO 7/1 Rp; NPS 1 x 2-1/4 ISO 7/1 Rp
x GAZ; NPS 2 / DN 50 CL125 FF / CL150 FF, PN 10/16
Maximum Operating Inlet Pressure:
Up to 16 bar / 232 psig
Maximum Emergency Inlet Pressure:
Up to 20 bar / 290 psig
Outlet Pressure Range: 17 mbar to 3,0 bar /
7-inches w.c to 43.5 psig
Operating Temperature: -29° to 66°C / -20° to 150°F
Spring Case Vent Connection: 1 NPT
Pressure Registration: Internal, External, or Dual
Body Material: Ductile Cast Iron and Steel
Overpressure Protection:
Integral True-MonitorTM Protection
Slam-Shut Protection
Natural Gas Technologies
Emerson Process Management Regulator Technologies, Inc.
North America
McKinney, Texas 75069-1872 USA
Tel: 1-800-558-5853
Outside U.S. 1-972-548-3574
Asia-Pacific
Singapore, Singapore 128461
Tel: +65 6777 8211
Our Global Natural Gas Product Brands:
D351370X012 © 2009 Emerson Process Management Regulator Technologies, Inc. All rights reserved. Printed in the U.S.A. 4/09.
Fisher, Francel, Tartarini, 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.
Europe
Bologna, Italy 40013
Tel: +39 051 4190611
Gallardon, France 28320
Tel: +33 (0) 2 37 33 47 00
For further information, visit www.emersonprocess.com/regulators
assures you of the highest-quality engineering,
performance, and support traditionally associated
with Fisher, Francel, and Tartarini regulators.
The distinctive swirl pattern cast into
every actuator casing uniquely identies
the regulator as part of the Fisher® brand
Commercial Service Regulator family and
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