Piston Pressure Reducing Valve

Piston Pressure Reducing Valve

Basic information
Basic information
This valve is used for branch pipe decompression, which can make water supply pressure distribution more balanced, avoid partial water supply overpressure, and optimize water supply division of high-rise buildings. It can replace the district frequency-regulated variable speed pumps and can replace the district pumps in the fire water supply system, can protect all faucet and other water appliances when used in the domestic water supply system.
Features
Features
1. Accurate Pressure Control
2. Resistance soiling & anti-fouling, no bypass pipe is required
3. Small fluid resistance
4. The internal structure is very simple and has no jam
Principle
Principle
To adjust the compression of the mainspring allows the valve core to move up and down. When the valve core moves in the middle position, the throttle area is changed and the outlet pressure is changed. When the throttle area decreases, the outlet pressure decreases to achieve the goal of adjustable pressure reduction. The valve core can be stabilized in a desired position by the combined action of the main spring and the auxiliary spring. If the pressure of the mainspring is minimized, the valve core is moved up to the highest point, at which point the valve is closed. Because the lower part of the disc is affected by both spring and outlet pressure, when the outlet pressure is decreased, the force on the lower part of the disc becomes smaller, the valve core moves downward under the action of the mainspring, the circulation area increases, and the outlet pressure increases. In contrast, when outlet pressure increases, the circulation area decreases
Installation and Commissioning
Installation and Commissioning
The valve can be installed horizontally or vertically. When the user needs to adjust the outlet pressure, he/she can first unscrew the upper screw plug and adjust the screw. Adjust the adjusting screw clockwise to increase the valve outlet pressure. In contrast, the adjusting screw is adjusted counterclockwise and the valve outlet pressure decreases. Cover the screw plug well after adjusting the pressure. For specific use, please consult ZhengFeng Valve Group.

Part

Material

Standard

Body

CuZn39Pb1 / C37000

EN12167/ASTM B135

Bonnet

CuZn39Pb1 / C37000

EN12167/ASTM B135

Trim

CuZn39Pb1 / C37000

EN12167/ASTM B135

Spring

Stainless Steel 431

EN10088-1/ASTM A959

O-Ring

EPDM / NBR

ISO 4633

For the materials options not listed, consult factory.

ZhengFeng manufactures valves in more than 50 different alloys.

Product scope, Standards & Materials
Size Range: 1/2"~2"
Pressure Rating: 10bar ~ 16bar
Face to Face Dimensions: EN 558-1, ASME B 16.10
Flange End Dimension: BS 21
Inspection and Test: ISO 5208 / EN 12226-2

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