Pressure Reducing Valve with Strainer & Piston

Pressure Reducing Valve with Strainer & Piston

Basic information
Basic information
This valve reduces the high upstream pressure to the required downstream service pressure
Features
Features
1. Filter function, no additional filter installation is required
2. Outlet pressure is not affected by inlet pressure and flow
3. Make the disc close proportional to the inlet pressure by using the principle of hydraulic control
4. Valve body adopts the streamlined design with low resistance and high flow
Principle
Principle
The main valve disc passes imitate the guide valve movement through the hydraulic pipe pressure transfer. When the downstream pressure is lower than the set pressure of the guide valve, the guide valve is opened, the pressure water above the piston is discharged downstream, the discharge speed is greater than that of the inlet, the main disc moves up to increase the downstream pressure to the set pressure. When the downstream pressure is higher than the set pressure, the guide valve is closed. The pressure water above the piston acts down on the piston, the main disc moves down, lowering the downstream pressure to the set value thus keep the downstream pressure constant. 
Installation and Commissioning
Installation and Commissioning
Some space should be reserved under the valve body for cleaning the filter screen when installing; Check whether the ball valve, needle valve is in the correct switch position before using; All ball valves are open and can only be turned from low pressure to high pressure if the pressure adjustment value exceeds the required set value. For specific use, please consult ZhengFeng Valve Group.

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

Piston

Stainless Steel 431 + EPDM

ISO 4633

Screen

Stainless Steel 431

EN10088-1/ASTM A959

For the materials options not listed, consult factory.

ZhengFeng manufactures valves in more than 50 different alloys.

Product scope, Standards & Materials
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

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