Our enterprise tenet:

Flexible rubber check valve is a full-rubber structure; "Duckbill-like" in appearance with a "forward inflow, reverse backstop" new feature to the drain valve products. It is based on mechanical analysis and force calculations for different conditions, using different design mechanisms and different rubber formulations made in accordance with special technology. Positive work, the water from the inlet flows, even slight pressure will be able to open the valve, the greater water pressure the larger the valve opening, so that the greater the water flow pass through. When reverse work, the valve close automatically, sealed backstop, the greater the back pressure, the tight the valve port will seal. It is widely used for municipal, irrigation, sewage water and other effluent outfall. Normally it is an ideal product to replace the flap valve at the present.

  Compare with the traditional flap valve: a) According to the water pressure automatically open and close, safe and reliable, no noise, no manual, no maintenance.
b) Small forward open water resistance, low start-up pressure and adjust the flow automatically. c) Good reverse backstop seal, no leakage, preventing back flow, the higher the back pressure is the greater the effect will be. d) Anti-corrosion, anti-aging, non-distortion, adaptive, long service time. e) Large size range, the nominal diameter between DN50 and DN3000.   Scope of application:
1) The product is widely used with good performance. 2) Apply to sewage system. 3) Applies to drainage system. 4) Applies to the dam discharge. 5) Applies to the airport, highway drainage. 6) Applies to sewer discharge. 7) Applied to discharge of sewage pond. 8) Odor separated.