Pressure Reducing and Sustaining Valve automatically perform two independent functions. It maintains a constant downstream pressure, regardless of fluctuating demand and sustains the upstream pressure to a pre-determined minimum. The pressure reducing pilot responds to slight variations in downstream pressure and immediately repositions the main valve to maintain the desired downstream pressure.
The pressure sustaining pilot is normally held open by the upstream pressure and close when the pressure drop to the set point. The valve usually used in lower elevation pipeline to guarantee prior use of higher elevation area.
1 Top and seat ring guided stem and diaphragm assembly for long Iife and reliability.
2 All iron components are fusion epoxy bonded for corrosion resistance.
3 Easy maintance without removal from the main line.
4 Nylon reinforced diaphragm for long time service .
5 Drip tight shut off.
6 Globe design for superior control characteristics.
7 Ductile iron bodies for higher strength and durability.
8 Corrosion resistant stainless steel seat and disc retainer ring.
9 Various pilots and accessories available for configuration into many different applications.
Special V-Port and double chamber are options, please consult factory.
10 Meet standards BS EN 1074-5, ISO 5208. BS EN 12266-1, BS EN 558-1,
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