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Type CSB400
Spring-Loaded Pressure Reducing Regulators

Tartarin Fisher Emerson



The CSB400 Series direct-operated,
spring-loaded regulators have been
engineered to
ft a multitude of
pressure-reducing applications including
commercial and industrial installations.
This flexibility is provided by the
numerous body sizes and end
connections, outlet pressure settings, as
well as the option for internal, external,
or dual pressure registration.
In addition to application flexibility, the
CSB400 Series offers multiple
protection options to meet your demands
on application requirements.
The CSB400 Series is in conformity with
the Pressure Equipment Directive
PED 2014/68/UE. The base regulator is

classifed under Category I, the regulator
slam-shut module is classifed under
Category IV.
Body Sizes and End Connection Styles
Ductile Cast Iron:
1, 1-1/4, 1-1/2, or 2 NPT, Rp 1, 1 x 1-1/4,
1-1/4, 1-1/2, or 2, Rp 1 x 2-1/4 GAZ, NPS
1-1/2 (DN 40), PN16, NPS 2 (DN 50),
CL125 FF, CL150 FF, or PN 10/16
1, 1-1/4 or 1-1/2 NPT, Rp 1, 1-1/4 or 1-1/2
Maximum Operating Inlet Pressure
Differential Strength
6 bar to 16 bar (depending on type)
Maximum Emergency Inlet
Pressure Differential Strength
10 bar to 20 bar (depending on type)
Outlet Pressure Range
mbar to 3 bar
Maximum Emergency Outlet
Pressure (Casing)
4 bar
Maximum Outlet Pressure to avoid
Internal Parts Damage
0.34 bar over set-point
• Slam-shut
• Ductile Cast Iron and WCC
Steel Bodies Available
• Wide Variety of Body
Sizes and End Connections
• No Special Tools for
Pressure Adjustment and
Orifice Removal
Maximum Operating Outlet Pressure
3 bar
Pressure Registration
Internal, external or dual
Temperature Capabilities
According to PED Standards:
-20° to 60°C
-30° to 66°C
Approximate Weights
Threaded Body:
Type CSB400: 4 kg
Type CSB403: 9 kg
Type CSB404: 5 kg
Flanged Body:
Add 4 kg to weights listed above
Type VSX4 Slam-Shut Module
Standard Overpressure Shutoff (OPSO)
Set Value:
43 to 3400
Standard Underpressure Shutoff
(UPSO) Set Value:
10 to 1500
Slam-Shut Vent: 1/4 NPT
External Sensing Line: 1/4 NPT
Casing Material
Pressure Registration
Internal or external
For full details consult the documentation available on our website:


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