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Non-return Valve


It is a collective name for valves to control single-way flow. The valve is buried in slope and bottom of the channel to control single-way drainage of underground water into channel under the designed waterhead difference. According to its opening way, it can be divided into anti-silting flap-type check valve, anti-silting ball-type check valve, etc.

Scope of application

Taking hard polyamine ethylene and Acrylonitrile-Brtadiene-Styrene (ABS) polyamide (nylon) as raw materials; injection molding;

Material requirement

(1) Main material of anti-silting check valve - Acrylonitrile-Brtadiene-Styrene (ABS) shall meet the requirements specified in the third chapter of GB/T20207.1-2006.

(2) The materials for the rubber seal of check valve movable door shall meet the standard of HG/T3091-2000.

(3) External waterproof rubber seal shall meet the standard of GB/T18173.3-2002.


Product standard GB/T10002.2-2003

Technical Parameters for South-to-North Water Diversion Project Requirements

Application Technology Requirements on Check Valve for Main Channel of South-to-North Water Diversion Middle Route Phase I Project (Revised)

GB8104-87 Testing Method of Flow Control Valves

Specifications and models

Specifications and models cases

JL: the acronyms of “Jianlin”.

F: anti-silting type

P: flap-type

110: For connecting pipe with nominal outside diameter of 110mm

5: Anti-silting top cover is 5cm higher than height of concrete surface.

Corresponding parameter set not found, please add it in property template of background
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