Pressure Reducing Valves
The valve maintains a preset downstream pressure, regardless of upstream pressure or flow rate fluctuation. The main valve is controlled by a 3-way pilot, allowing full opening when the pressure drops below a downstream pressure set-point.
Features & Benefits
- Accurate, stable control from no-flow to full-flow.
- Exceptionally low head losses at high flows.
- High resistance to corrosive water and other acid media (including 3-way pilot).
- Simple to install – manufactured with threaded or socket (slip) connections.
- Simple and reliable design – diaphragm is the only moving component.
Shaft, seals or bearings are not located within the water’s passage way.
Purchase Specifications
- Hydraulic valve with direct sealing flexible diaphragm.
- Inline maintenance.
- Stem, shaft or guide bearing are not located within the water passage.
- Activated by the line pressure or by an external hydraulic or pneumatic
pressure. - Operated by a pressure reducing pilot valve to achieve constant outlet
pressure, regardless of upstream pressure or flow variations. - Valve and the controls are Netafim Series 61PRXPLS (X is used to signify size
of valve – 3″, 4″, 6″, etc.).
Quick Sizing
- Valve size same a line size or one size smaller.
- Maximum flow speed for continuous operation of 18 ft/sec.
Design Considerations
- The valve should be suited for the maximal flow and allowed headloss.
- Large pressure differentials may cause cavitation damage. Consult with Netafim if such conditions are expected.
Pressure Reducing Valves Technical
Specifications*
- Nylon Valve Operating Pressure:
– Maximum pressure: 145 psi (10 bar)
– Minimum pressure: 8 psi (0.6 bar) - 3″ and 4″ PVC Valve Operating Pressure:
– Maximum pressure: 115 psi (8 bar)
– Minimum pressure: 8 psi (0.6 bar) - 6″ PVC Valve Operating Pressure:
– Maximum pressure: 145 psi (10 bar)
– Minimum pressure: 8 psi (0.6 bar) - Maximum water temperature:
– 100° F at maximum pressure
*Pressure refers to upstream pressure
D[mm] ≤ √(250 x Flow[m3/hr] / √Pressure [mwc])