Pressure Relief/Sustaining Valve IR-430

The BERMAD Model IR-430 Pressure Relief/Sustaining Valve is a hydraulically operated, diaphragm actuated control valve that can fulfill either of two separate functions. When installed in-line, it sustains minimum preset upstream (back) pressure regardless of fluctuating flow or varying downstream pressure. When installed as a relief or circulation valve, it relieves line pressure in excess of preset.

    • Line Pressure Driven Pressure Relief/Sustaining Valve


    • Controls system fill-up 
        • Sustains upstream line pressure


        • Relieves excessive pressure protecting pump and system


        • Prioritizes pressure zones




    • Advanced Globe Hydro-Efficient Design
        • Unobstructed flow path


        • Single moving part


        • High flow capacity




    • Fully Supported & Balanced Diaphragm
        • Requires low opening and actuation pressure


        • Excellent low flow regulation performance


        • Progressively restrains valve closing


        • Prevents diaphragm distortion




    • User Friendly Design
        • Easy pressure setting


        • Simple in-line inspection and service




Typical Applications

  • Downhill Supply Lines Emptying Prevention
  • Pressure Zone Prioritizing
  • Line Fill-Up Control
  • Pump Overload and Cavitation Protection
  • Pump Minimum Flow Safeguard
  • Excessive Line Pressure Protection


English IR 430 Product Page
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English Ordering Guid 400 Series
English Spare Parts - Irrigation