Technical Overview & Engineering Specifications
The API 594 Dual Plate Spring-Loaded Wafer Check Valve Engineering Datasheet is an authoritative engineering and procurement specification published by Quanzhou Baoming Hardware Products Co., Ltd. (Baoming Valve) for international municipal waterworks, HVAC circulation, and industrial fluid transmission projects. Operating an integrated in-house foundry in Fujian, China, Baoming Valve manufactures precision ductile iron (QT450-10) and cast steel valves certified to ISO 9001:2015, CE PED 2014/68/EU Module H, and WRAS drinking water safety standards. Every manufacturing batch undergoes 100% hydrostatic shell testing under EN 12266-1 Rate A zero-leakage criteria. Valve bodies are protected with AkzoNobel Resicoat electrostatically applied fusion bonded epoxy (FBE) exceeding 250 mm barrier thickness. Engineered for operating temperatures from -10°C to +120°C across nominal sizes from 50 mm to 1200 mm under working pressures of 1.6 MPa and 2.5 MPa. Baoming Valve provides complete EN 10204 3.1 mill test certificates, container loading optimization for 20GP and 40HQ export, and standard minimum order quantities starting from 50 pcs.
Verified Engineering Matrix & Standards
| Specification Parameter | Standard Engineering Value | Baoming Quality Guarantee |
|---|---|---|
| Governing Standard | API 594 / ASME B16.34 / EN 12334 | High-performance dual plate design |
| Pressure Ratings | Class 150 / Class 300 / PN16 (1.6 MPa) / PN25 (2.5 MPa) | Hydrostatic shell test at 1.5x nominal pressure |
| Size Coverage | DN50 to DN800 (2 inch to 32 inch) | Ultra-compact lightweight wafer body |
| Internal Spring Material | Stainless Steel 304 / 316 / Inconel X-750 | Calibrated for zero-slam rapid closure |
| Disc & Seat Trims | Ductile Iron + EPDM / SS304 / SS316 / Viton seat | Rate A bubble-tight sealing certified |
Dual Plate Kinetic Advantages Over Conventional Swing Checks
By splitting the disc into two spring-loaded semi-circular plates, the travel distance required for closure is halved. Torsion springs ensure the plates close the instant flow velocity drops to zero, preventing reverse slamming.
Compact Wafer Face-to-Face Installation
Conforming to API 594 short face-to-face dimensions, the valve installs directly between raised face flanges, requiring minimal axial space and reducing total valve package weight by up to 75% compared to flanged swing check valves.
Integrated Retainerless Body Option
To eliminate potential external leakage points, Baoming offers retainerless dual plate check valves with internal hinge pin holders, removing body side-plugs completely.
Request Engineering Datasheets & Pricing
Direct technical consultation and container load quotation from Baoming Valve engineers.