Southwest Irrigation, LLC
Southwest Irrigation is the leading supplier for Heap Leach Mining Systems and Agricultural Irrigation Systems in the southwest.

Pressure Sustaining Valve

The BERMAD Model IR-430-XZ Pressure Relief/Sustaining Valve is a hydraulically operated, diaphragm actuated control valve that it sustains minimum preset upstream (back) pressure regardless of fluctuating flow or varying downstream pressure.

Features and Benefits

3-Way Hydraulic Actuated Pressure Sustaining Valve

  • Controls system fill-up
  • Sustains upstream line pressure
  • Opens fully upon line pressure rise
  • 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
  • Systems Subject to Varying Supply Pressure
  • Energy Saving Irrigation Systems
  • Pressure Zone Prioritizing Line Fill-Up
  • Control Pump Overload and Cavitation Protection



  Office 520-384-9223
401 E Maley
Willcox, AZ 85643
Mining Orders:
Agricultural Orders: