Slient Check Valve

Slient Check Valve

Basic information
Basic information
This valve is installed at pump outlet to prevent backflow of medium and reduce noise and water hammer of water system.
Features
Features
1. Flexible opening and closing, with grease sleeve between guide shaft and guide frame;
2. The disc opens and closes short stroke to prevent water hammer;
3. Fluid flow smooth, local head loss small;
4. Simple structure and convenient maintenance.
Principle
Principle
This valve works automatically, and the disc opens under the action of fluid pressure flowing in one direction. When the fluid is flowing in the opposite direction, the pressure of the fluid and the self-aligning disc of the disc act on the seat to cut off the flow. It is not suitable for medium containing solid particles and high viscosity. When the medium flows in the specified direction, the disc is opened under the action of medium force. When the medium reverse flow, because of the disc self-weight and disc by the medium reverse force, so disc and seat sealing surface close and closed.
Installation and Commissioning
Installation and Commissioning
Do not load check valves in the line. Large check valves should be independently supported to protect them from pressure from piping. For specific use, please consult ZhengFeng Valve Group.

Part

Material

Standard

Body

Ductile Iron

EN 1563/DIN 1693

Disc

Stainless Steel 431

EN10088-1/ASTM A959

Stem

Stainless Steel 431

EN10088-1/ASTM A959

Seal

EPDM / NBR

ISO 4633

Nut

CuZn39Pb1 / C37000

EN12167/ASTM B135

Spring

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"~20"
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

Leave us Message

Related Product Cases
Wenzhou Olympic Sports Center

Wenzhou Olympic Sports Center

Wenzhou Olympic Sports Center main stadium project and Wenzhou sports school Yongzhong campus project are located in the...
Jinan University

Jinan University

Jinan University is a comprehensive university jointly established by shandong provincial people's government and minist...
Fuzhou Water Company

Fuzhou Water Company

Fuzhou Water Company has six water plants in operation, with a total capacity of 1.32 million cubic meters of water per ...
Related News
  • TEL:+86-21-59599006
  • FAX:+86-21-59599006 ext.806
  • EMAIL: marketing@zecovalve.com
  • ADDRESS:Caoan Road 3999#, Shanghai, China
ZhengFeng Valve Product Information Catalog Download