Soft Wash Check Valve with FKM Seals, 1/3 PSI Cracking Pressure & Hastelloy Spring

Soft wash mixer check valve with bleach resistant upgraded springs that work better than stainless springs  These 685 and 687 Series Polypropylene Check Valves with FKM Seals 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: 1/2" O-Ring poppet, 3/4" Disc Poppet Maximum Pressure: 125 psi Maximum Temperature: 140°F   1" Polypropylene FPT Check Valve Features: One piece construction Glass reinforced polypropylene 316 stainless steel springs EPDM gasket