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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

pressurereducing-headloss
pressurereducing-dimensions
pressurereducing-flowrates

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
pressurereducing-materialspec
D[mm] ≤ √(250 x Flow[m3/hr] / √Pressure [mwc])