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Products  >  100 Series (GAL)  >  Control Functions  >  100PR Pressure Reducing Valve  >    

100PR Pressure Reducing Valve


The valve maintains a preset downstream pressure, regardless of upstream pressure or flow rate fluctuation.
The main valve is controlled by either a 3-way pilot valve (allowing full opening when upstream pressure drops below the pressure set-point), or by a 2-way pilot valve (creatinga minimal differential in open position).
  Accurate, stable control from no-flow to full flow
Simple and reliable design
Exceptionally low losses at high flow 
WRAS Approval no. 04251

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 reducing pilot valve to achieve constant outlet pressure, regardless of upstream pressure or 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
  In case upstream pressure may drop to the required set pressure, select 3-way control pilot
Large pressure differentials may cause cavitation damage. Consult Dorot for solutions if 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 Reducing Valve reduces varying supply pressure to a
stabilized downstream pressure.

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