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

Pressure Reducing and Sustaining Hydrometer

The BERMAD Model IR-923-M0-55-R integrates a vertical turbine Woltman-type water meter with a diaphragm actuated hydraulic control valve. As the system’s Flow Meter and Main Valve, it controls irrigation together with the irrigation controller. The BERMAD Hydrometer sustains the preset minimum upstream pressure; reduces downstream pressure to a constant preset maximum, and either opens or shuts in response to an electric signal.

Features and Benefits

Integrated "All-in-One" Control Valve

  • Saves space, cost and maintenance

Line Pressure Driven, Electrically Controlled On/Off

  • Protects downstream systems
  • Prioritizes pressure zones
  • Controls system fill-up

Magnetic Drive with Vacuum-Sealed Register

  • Water-free gear train mechanism
  • Reed-switch and Opto pulse-generating modes
  • Various pulse combinations

InternalInlet & Outlet Flow Straighteners

  • Saves on straightening distances
  • Maintains accuracy

Integrated Flow Metering Calibration Device

User-Friendly Design

  • Simple in-line inspection and service

Typical Applications

  • Computerized Irrigation Systems
  • Remote and/or Elevated Plots
  • Flow Monitoring & Leakage Control
  • Line Fill-Up Control
  • Line Emptying Prevention
  • Pressure Reducing Stations
  • Filter Stations
  • Irrigation Machines


[1] BERMAD Model IR-923-M0-55-R opens in response to an electric signal, sustains filters back flush pressure and establishes reduced pressure zone.
[2] BERMAD Relief Valve Model IR-43Q-R
[3] BERMAD N.C. Main Valve Model IR-405-54-R



  Office 520-384-9223
401 E Maley
Willcox, AZ 85643
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