Pressure Reducing Valve


Pressure Reducing Valve

Festures of Pressure Reducing Control Valve

  • Sensitive and accurate pressure control
  • Adjustable static pressure and dynamic pressure
  • Outlet pressure does not fluctuate with inlet pressure
  • Full port, small fluid resistance

Pressure Reducing Valve Working Principle


When water flows through the valve, water flows into the main valve control chamber through the needle valve, and the outlet pressure is imposed on the pilot valve through the guide duct. When outlet pressure is higher than the set pressure of the pilot valve, the outlet pressure does not rise any more; when the outlet pressure of the valve reduces to the set pressure of the pilot valve, the pilot valve opens, water is discharged out of the control chamber. Because the water discharged from the pilot valve system is more than the water inflow, the pressure in main valve control chamber reduces. The inlet pressure forces the main valve open. In a stable state, the water inflow and discharged water of the control chamber are equal. The opening of the main valve keeps constant, with stable outlet pressure.

Pressure Reducing Valve Installation and Commissioning

For operation, adjustment and maintenance convenience, the pressure reducing valve is typically installed on a horizontal pipe along with a backup pressure reducing valve group. Every grade of spring of the pressure reducing valve  can only apply in a certain range of outlet pressure, and outlet pressure can be set only by adjusting the spring of pilot valve. For specific use, please consult ZECO Valve Group.

Pressure Reducing Valve Material and Standard

Size Range: 2″~24″

Pressure Rating: 10bar ~ 25bar

Face to Face Dimensions: AMSE B16.10, EN558-1

Flange End Dimension: AMSE B16.1/16.42, AS4087, EN1092-2

Coating: Fusion Bonded Epoxy Coating

Inspection and Test: ISO 5208 / EN 12226-2

Part Material Standard
Body Ductile Iron EN 1563/DIN 1693
Bonnet Ductile Iron EN 1563/DIN 1693
Trim Stainless Steel 431 EN10088-1/ASTM A959
Seat Stainless Steel 431 EN10088-1/ASTM A959
Diaphragm EPDM / NBR ISO 4633
Pilot Valve Stainless Steel 431 EN10088-1/ASTM A959
For the materials options not listed, consult factory.

ZECO manufactures valves in more than 50 different alloys.

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