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Products  >  100 Series (GAL)  >  Control Functions  >  100DI Pressure Differential Sustaining Valve  >    

100DI Pressure Differential Sustaining Valve


The valve maintains a preset pressure differential between its upstream and downstream sides. The valve can control
booster pump discharge, heating and cooling systems, bypass configurations, filters and other similar systems.
  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 differential pilot valve so to maintain
a minimal pressure differential, 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
The connection points of the sensing tubes must be selected in locations free of turbulence and local interferences



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 Differential Sustaining Valve controls the flow at the discharge of a booster pump whose suction pressure varies.

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