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Products  >  100 Series (GAL)  >  Control Functions  >  100PS Pressure Sustaining & Relief Valve  >    

100PS Pressure Sustaining & 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 the set-point and will fully open when the upstream pressure exceeds the set-point.
Accurate, stable control from no-flow to full flow
Simple and reliable design
Exceptionally low losses at high flow

Purchase Specifications
The valve will be hydraulic, direct sealing diaphragm type, which allows inline maintenance. No stem, shaft or guide bearing will be located within the water passage. The valve will be activated by the
line pressure or by an external hydraulic or pneumatic pressure. The valve will be operated by a pressure sustaining pilot valve to maintain constant inlet pressure, regardless of flow variations. The valve
and the controls will be a Dorot Series 100 valve or similar in all aspects.
Quick Sizing
  Valve size same as line or one size smaller
  Maximum flow speed for continuous operation 5.5 m/sec (18 ft/sec)

Design Considerations
  The valve should be suited for the maximal flow and allowed headloss
  Check for possible cavitation conditions and consult Dorot in case such conditions are expected



Optional Control System Components:

1.  Main Valve
2. Self-flushing filter
3. Cock valve*
4. Manual over-ride selector valve*
5. 3-way pilot valve (other types are optional)

* Optional component


Typical Application

Dorot Pressure Relief Valve relieving pump surplus flow from the system,
thus preventing high pressure at low demand conditions.

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