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Dorot Pressure Sustaining & Relief Valves

Control Valve > DOROT

Dorot Construction & Industry.
Download Technical Data :http://www.dorot.com/index.php?page_id=85


 
 
  • Dorot Pressure Sustaining & Relief Valves.

- 100 Series
- 300 Series
- 500 Series
- Air Valve
- Mechanical Valve
- Pilots and Accessories

  • 100PS Pressure Sustaining & Relief Valve.


 

Description
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.
Features
•  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 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
•  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.


  • 300 Series Pressure Sustaining & Relief Valve.

300PS - Pressure Sustaining Valve
300PS(R)- Pressure Relief Valve

 

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.

  • 300 Series Pressure Sustaining & Relief Valve.

300QR - Quick-Relief Safety Valve

 

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.

  • 500 Series Pressure Sustaining & Relief Valves.

500PS - Pressure Sustaining Valve
500PS(R) - Pressure Relief Valve

 

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
the set-point and will be fully-opened when the upstream pressure exceeds the set-point.

DI - Pressure Differential Sustaining Valve
The valve maintains a preset pressure differential between the upstream and
downstream pressures. The valve controls booster pumps discharge, heating and
cooling systems, bypass configurations, etc.

  • 500 Series Pressure Sustaining & Relief Valves.

500QR - Quick-Relief Safety Valve

 

QR - Quick-Relief Safety Valve
The valve opens instantly when the pressure in the pipeline exceeds the safelevel,
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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