The Model FP 420-00 Pressure Reducing Valve is a hydraulically self operated, diaphragm actuated control valve that reduces high, unstable upstream pressure to maintain precise stable downstream pressure, regardless of flactuating demand or varying upstream pressure.
The BERMAD Model FP 420-00, pilot operated pressure reducing valve automatically and accurately reduces upstream water pressure to a specific, adjustable value. The FP 420-00 operates under both flowing and non-flowing (static) conditions. The Pressure Reducing Pilot  senses downstream pressure  and in real time modulates the main valve  to maintain the constant downstream pressure.
In no-flow static conditions, should the downstream pressure start rising above pilot setting, the pilot closes, shutting the main valve drip-tight  to maintain the allowable downstream pressure.
The pressure reducing valve shall eliminate downstream over-pressure, maintaining a constant downstream delivery pressure, regardless of varying pressures and/or flows. The main valve shall be an elastomeric type globe valve with a rolling-diaphragm. Valve actuation shall be accomplished by a fully peripherally supported, one-piece balanced rolling-diaphragm, vulcanized with a rugged radial seal disk. The diaphragm assembly shall be the only moving part.
The valve shall have an unobstructed flow path, with no stem guide or supporting ribs. The valve shall have a removable cover for quick in-line service enabling all necessary inspection and servicing.
The control trim shall be supplied as an assembly, pre-assembled and hydraulically tested at an ISO 9000 and 9001 certified factory.
1 - BERMAD Model FP 420-00
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3 - Isolating Valve
4 - Pressure Gauge
5 - Strainer
6 - BERMAD Model FP 720-UL, High Pressure Reducing Valve