Description
Product Description
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.
Key Features:
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💧 Material: Polypropylene body with FKM seals
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⚙️ Spring: Hastelloy for chemical resistance
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🚿 High flow rate for optimal performance
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🔁 O-ring poppet mechanism ensures reliable check action
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✅ Cracking pressure: Only 1/3 psi for quick response
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🔒 Positive seal at very low back pressure or slight vacuum
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🔧 Seat area open diameter: 0.438"
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📈 Max pressure: 125 PSI
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🌡️ 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.