3/4" FNPT x 3/4" FNPT Series 687 Polypropylene Check Valve with FKM Seals, 1/3 PSI Cracking Pressure & Hastelloy Spring

These 687 series check valves can be used for a wide range of air and fluid applications. Polypropylene FKM seals Hastelloy spring High flow rate Seat area open diameter: 0.438" Positive seal at very low back pressure or slight vacuum Cracking pressure: 1/3 psi Check mechanism: Disc poppet Maximum pressure: 125 psi Maximum temperature: 140°F Item Information Item Number: 22657 Manufacturer: SMC Manufacturer Part #: 6870490 Country of Origin: USA   Tech Specs Material: Polypropylene Seal: FKM Connection: FNPT x FNPT Size: 3/4" Weight: 0.11 lbs