Flexible customized duckbill rubber check valve of factory

The long use life Rubber Duckbill Valves

1.Stat-up Pressure is small
2.Flow adjusted Naturally The long use life Rubber Duckbill Valves
3.Without Leakage
4.Wide size Scope Product Introduction: All Inline Check Valve is a revolutionary design for backflow prevention. Inline Check Valve requires no routine maintenance or repair due to their all-rubber construction.

Inline Check valve is substantially more cost efficient than conventional check valves. They are totally passive valves, operating solely on line and back pressure, and require no outside energy source for operation. Sliding, rotating, swinging and plunging parts are completely eliminated.

Inline Check valve is excellent replacements for ineffective flap gate valves. Millions of dollars each year are lost in the re-treatment of unnecessary backflow because of faulty check valves which have corroded open or have been wedged open by debris. Inline Check valve seal and close drop tight around debris with less than 1 psi of back pressure.

Inline Check valve will not warp or freeze, and are virtually maintenance free. They will handle large obstructions without jamming, and there is no gate to hang open. Inline Check valve is easily banded on the end of the discharge or storm sewer line, eliminating the need for headwalls.

This Inline Check Valve is fitted with an elastomer disc that can be manipulated with hydraulic pressure. Forward hydraulic pressure enables flow through the perforated plate interior, while reverse hydraulic pressure seals the disk against the plate for optimum backflow prevention. The Waterflex Inline Check Valve comes in flanged and mating valve insert styles.

Main data:

Matching Pipeline Diameter	Valve Step (A)	Pipeline Touching (B)
1/2'-3/4'	15	15
1'-1-1/4'	20	20
1-1/2-2-1/2	25	25
3'	40	40
4'	50	50
6'	50	50
8'	50	50
10'	50	50
12'-14'	100	100
16'-20'	150	150
24'-36'	200	200
42'	250	250
48'-60'	300	300
72'	400	400