SMC Polypropylene Check Valve 1/2 Inch Female Pipe Thread to 1/2 Inch Female Pipe Thread

P857085 - The 685 Poppet Check Valve incorporates a thin elastomer disc supported by a poppet that seals on the seat Pressure in the flow direction moves the seal off the seat at about 1/3 psi before pressure builds enough to move the poppet away from the seat Maximum operating pressure of 125 psi covers a wide range of air and fluid applications Compact design with a light cracking pressure, high flow rate, and a positive seal at very low back pressure or slight vacuum An embedded O-Ring Poppet is supplied for cracking pressure applications 1/2 psi and higher Hastelloy� is a superior chemically resistant spring material