Description
Pressure Reducing and Sustaining Valve IR-423-XZ
The Bermad Model IR-423-XZ 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.
Applications:
Downhill Supply Lines
- Emptying Prevention
- Higher Pressure Zone Prioritizing
- Lower Pressure Zone Protection
Line Fill-Up Control
Systems Subject to Varying Supply Pressure
Energy Saving Irrigation Systems
Pump Overload and Cavitation Protection
Deep Well Pump Drawdown Compensation
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
Simple in-line inspection and service
The Pressure Reducing Pilot (PRP) is hydraulically connected to the Valve Control Chamber through the Pressure Sustaining Pilot (PSP). The PSP commands the Valve to throttle closed should Upstream Pressure drop below setting.
When rises above setting, the PSP switches and allows the PRP to control the Valve, commanding it to reduce Downstream Pressure. Should line pressure remain above PSP setting but below PRP setting – the Valve opens fully. The Manual Selector enables local manual closing.
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