Bermad IR-420-54-bK Pressure Reducing Valve



Pressure Reducing Valve IR-420-54-bK

Bermad Model IR-420-54-bK is a hydraulically operated, diaphragm actuated control valve that reduces higher upstream pressure to very low and stable preset downstream pressure, regardless of fluctuating demand or varying upstream pressure.

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


  • Computerized Irrigation System
  • Drip-Tape Systems
  • Low Set Pressure Applications
  • Remote and/or Elevated Plots
  • Distribution Centers


  • Line Pressure Driven Normally Closed PRV
    • Protects downstream systems
    • Closes upon control failure
    • Amplifies and relays weak remote command
  • Amplifies and relays weak remote command
    • Dynamic integrated needle valve
    • Settable to 0.5 bar; 7 psi
    • Very low hysteresis
  • AdvancedGlobeHydro-EfficientDesign
    • 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
  • Simple In-Line Inspection and Service



The 3-Way Hydraulic Relay Valve (3W-HRV) hydraulically connects the Pressure Reducing Pilot (PRP) to the Valve Control Chamber. The PRP commands the Valve to throttle closed should Downstream Pressure rise above setting, and to open fully when it drops below setting. The 3W-HRV switches upon pressure drop command, directing line pressure into the control chamber, and thereby causing the main Valve to shut. The 3W-HRV also features local manual closing.


Pressure Reducing Valve IR-420-54-bK Pressure Reducing Valve IR-420-54-bK Brochure