1/2" FNPT x 1/2" FNPT Polypropylene Check Valve w/FKM Seals | 1/3 PSI Cracking Pressure & Hastelloy Spring

1/2" FNPT x 1/2" FNPT Polypropylene Check Valve w/FKM Seals | 1/3 PSI Cracking Pressure & Hastelloy SpringBuilt for reliability and versatility, the 1 2" 685 Series Check Valve is ideal for a wide range of air and fluid applications, making it a top choice for soft wash systems and power washing rigs. Featuring a durable polypropylene body, FKM seals, and a Hastelloy spring, this valve is designed for corrosion resistance, chemical compatibility, and long term performance. Its high flow rate and positive sealing at low back pressure ensure smooth,

Built for reliability and versatility, the 1/2" 685 Series Check Valve is ideal for a wide range of air and fluid applications, making it a top choice for soft wash systems and power washing rigs.

Featuring a durable polypropylene body, FKM seals, and a Hastelloy spring, this valve is designed for corrosion resistance, chemical compatibility, and long-term performance. Its high flow rate and positive sealing at low back pressure ensure smooth, efficient operation-even under light vacuum conditions.

Features

• 💧 Material: Polypropylene body with FKM seals

• ⚙️ Spring: Hastelloy for chemical resistance

• 🚿 High flow rate for optimal performance

• 🔁 O-ring poppet mechanism ensures reliable check action

• ✅ Cracking pressure: Only 1/3 psi for quick response

• 🔒 Positive seal at very low back pressure or slight vacuum

• 🔧 Seat area open diameter: 0.438"

• 📈 Max pressure: 125 PSI

• 🌡️ Max temperature: 140°F

Whether you're upgrading your rig or building a custom system, this check valve delivers the durability and performance you can count on.