Bermad IR-423 Series Metal Hydraulically Operated Pressure Reducing/Sustaining Valve

The Bermad Model IR-423 Pressure Reducing and Sustaining Valve is a hydraulically operated, diaphragm actuated control valve with two independent functions. It sustains minimum preset upstream pressure regardless of fluctuating flow or varying downstream pressure, and it prevents downstream pressure from rising above maximum preset, regardless of fluctuating flow or excessive upstream pressure.

If you are using fixed speed pumps that produce a range of pressures dependent on flow, irrigation designs play a crucial role. The system is designed to ensure constant main line pressure – regardless of flow and irrigation shifts.

When these two functions work together it is referred to as a pressure sustaining and reducing function. There are common misconceptions about the size, set and operation of these valves. In this article we will address these issues – ensuring optimum performance of your pump station.

APPLICATIONS

• Downhill Supply Lines
• Emptying Prevention
• Higher Pressure Zone Prioritizing
• Lower Pressure Zone Protection
• Line Fill-Up Control
• Pump Overload and Cavitation Protection 
• Deep Well Pump Drawdown Compensation

FEATURES

• Line Pressure Driven PRV and PSV
  • Prioritizes higher pressure zones
  • Protects lower pressure zones
  • Controls system fill-up
  • Prevents pipeline emptying
  • Protects pump from overload and cavitation
  • Compensates during groundwater drawdown
• 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-Friendly Design
  • Easy pressure setting
  • Simple in-line inspection and service