... .003MPa, equivalent to a basin of water.Under normal circumstances, the duckbill check valve can normally 3 meters in the underwater work, but ... years, but in general, at room temperature, and the climate is bad, you can use five years, even as long as 10 years, but ... and long service life. 5) A wide range of sizes and nominal diameter DN50-DN2400. The most professional Rubber Duckbill Check Valve ...