A high-quality API lug-type wafer dual plate check valve is a specialized valve designed to prevent backflow in piping systems while ensuring minimal pressure drop, compact design, and compliance with industry standards.
Key Features:
API Compliance:
Manufactured to API 594 standards, ensuring reliability in oil, gas, petrochemical, and industrial applications.
May also meet API 6D for pipeline valves if specified.
Lug-Type Wafer Design:
Lug-style allows easy installation/removal without disturbing the entire pipeline (unlike traditional wafer valves).
Dual-plate (double-disc) design reduces weight and space requirements compared to swing check valves.
Dual Plate (Double Disc) Mechanism:
Two spring-loaded hinged discs that open with forward flow and snap shut upon flow reversal.
Faster response time than swing checks, minimizing water hammer.
Materials & Construction:
Body: Carbon steel (ASTM A216 WCB), stainless steel (CF8/CF8M), or alloy steel (WC6/WC9).
Discs & Springs: Stainless steel (SS316) for corrosion resistance.
Seats: Resilient (EPDM, NBR) or metal-to-metal for high temps/pressures.
Pressure & Temperature Ratings:
Class 150 to Class 900 (PN16 to PN160).
Suitable for temperatures from -196°C to +550°C (depending on materials).
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