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Products  >  300 Series  >  Control Functions  >  Pressure Sustaining & Relief Valves  >    

Pressure Sustaining & Relief Valves

PS - Pressure Sustaining Valve
PS(R)- Pressure Relief Valve
The valve maintains upstream pressure, regardless of flow rate variations.
The valve will be in the “closed” position if the upstream pressure drops below theset-point and will fully open when the upstream pressure exceeds the set-point.
QR - Quick-Relief Safety Valve
The valve instantly opens when the pressure in the pipeline exceeds the safe level, thus relieving excessive pressure from the network. When the pressure returns to normal, the valve closes slowly, at an adjustable pace.


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