Bermad IR-423-54-KX Pressure Reducing and Sustaining Valve



Pressure Reducing and Sustaining Valve IR-423-54-KX

The Bermad Model IR-423-54-KX is a hydraulically operated, diaphragm actuated control valve that sustains minimum preset upstream (back) pressure and reduces downstream pressure to a constant preset maximum.

It is a Normally Closed valve, which opens in response to a remote pressure rise command and shuts in the absence of that command.


  • Computerized Irrigation Systems
  • Line Fill-Up Control Solutions
  • Pressure Reducing Systems
  • Remote and/or Elevated Plots
  • Infield Filter Backwash Pressure Sustaining
  • Distribution Centers


  • Line Pressure Driven, Normally Closed
    • Closes upon control failure
    • Protects downstream system
    • Prioritizes pressure zones
    • Controls system fill-up
    • Amplifies and relays weak remote command
  • Advanced Globe Hydro-Efficient Design
    • Unobstructed flow path
    • Single moving part
    • High flow capacity
  • Fully Supported & Balanced Diaphragm
    • Requires low actuation pressure
    • Excellent low flow regulation performance
    • Progressively restrains valve closing
    • Prevents diaphragm distortion
  • User-FriendlyDesign
    • Easy pressure setting
    • Simple in-line inspection and service



The Pressure Reducing Pilot (PRP) Is hydraulically connected to the Valve Control Chamber through the Pressure Sustaining Pilot (PSP) and the 3-Way Hydraulic Relay Valve (3W-HRV). The PSP commands the Valve to throttle closed should Upstream Pressure drop below setting. When rises above setting, the PSP switches and allows the PRP to control the Valve, commanding it to reduce Downstream Pressure.

Upon a pressure drop command, the 3W-HRV switches, blocks the pilots and directs line pressure into the control chamber, shutting the Valve.


Pressure Reducing and Sustaining Valve IR-423-54-KX
Pressure Reducing and Sustaining Valve IR-423-54-KX Brochure