Back To Top
Fisher™ CP400 Series Pressure Loaded Pressure Reducing Regulators
Fisher CP400 Series pressure loaded regulators provide pressure-reducing applications for light industrial and commercial installations, which include accurate control for use in pressure-factor measurement (fixed factor billing) applications.
Options include numerous body end connection sizes, body materials, outlet pressure settings, orifice sizes, internal/external pressure registration, and overpressure protection.

CAD Drawings and Models: Click Here
Fisher™ CP400 Series Pressure Loaded Pressure Reducing Regulators


Available Configurations
Stand-Alone Regulator, Non-Relief, Token Relief, Internal or External Pressure Registration, Integral True-Monitor, VSX4 Slam-Shut Module
Body Sizes and End Connection Styles
Gray CI: 1-1/4, 1-1/2, 2 NPT, NPS 2 / DN 50, CL125 FF
DI: 1-1/4, 1-1/2, 2 NPT, Rp 1-1/4, 1-1/2, 2, NPS 2 / DN 50, CL125FF FF / CL150 FF, PN 10/16
ST: 1-1/4, 1-1/2 NPT, Rp 1-1/4, 1-1/2
Maximum Operating Inlet Pressure
125 psig / 8.6 bar
Outlet Pressure Range
1 to 20 psig / 0.07 to 1.4 bar
Maximum Emergency Outlet Pressure (Casing)
25.0 psig / 1.7 bar
Maximum Outlet Pressure to Avoid Internal Parts Damage
5 psig / 0.34 bar over set point
Maximum Operating Outlet Pressure
20.0 psig / 1.4 bar
Pressure Registration
Internal or External
Temperature Capabilities
-20 to 150°F / -29 to 66°C
Approximate Weights
With Threaded Body:
Type CP400: 11 Pounds / 5 kg
Type CP403: 20.5 Pounds / 9 kg
Type CP404: 13.2 Pounds / 6 kg
With Flanged Body: Add 8.6 Pounds / 4 kg to weights listed
Type TM600 True-Monitor™ Specifications
Control Press: 1-7.5 psig/0.07-0.52 bar
Max Op Outlet Pressure Type TM600 Installed CP403: 7.5 psig/0.52 bar
Connections: Slam-Shut Vent: 1/4 NPT Ext Sensing Line: 1/4 NPT
Casing Material: AL Press Reg
Type VSX4 Slam-Shut Module Specifications
OPSO Only:2-43.5psi/0.14-3.0bar
   OPSO:2.2-29 psi/0.15-2bar
   UPSO:0.36-29 psi/0.03-2.0bar
Vent:1/4 NPT
Ext Sense:1/4 NPT
Case Material:AL
Press Reg:Int or Ext


  • Wide Variety of Body Sizes and End Connections?
  • Fixed Factor / Pressure Factor Measurement (PFM) Accuracy Capabilities
  • Field Convertible from Internal Sensing for Wide-Open Monitor Construction
  • Multiple Overpressure Protection Options
  • Available in Gray Cast Iron, Ductile Iron, and Steel Body Materials
  • Only Standard Tools Required for Pressure Adjustment and Orifice Removal
  • Easy to Maintain