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