Wafer Dual Plates Check Valves
 | Applicable standards: Design description:
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Wafer Dual Plates Check Valve Specifications
Wafer check valves, also know as dual-plate check valves, has two spring loaded half-moon shaped discs that rotate about their shaft. The disc plates are kept shut by the torsion spring. When fluid flows in the forwards direction, the pressure of the fluid causes the disc plates to hinge open, allowing flow. The check valve is closed by the spring as soon as flow ceases, before any reverse flow can occur.
* Design:
API 594: Steel Wafer Dual Plates Check Valves (Flanged and Butt- Welding Ends) for the Petroleum, Petrochemical and Allied Industries
* Connection: ASME B16.34 Valves Flanged, Threaded and Welding Ends
Flange:
ASME B16.5 Pipe Flanges and Flanged Fittings: NPS 1/2 through 24
ASME B16.47 Series A Large Diameter Steel Flanges: NPS 26 Through NPS 60 Metric/Inch Standard
Butt Weld:ASME B16.25 Buttwelding Ends
* Face to face:ASME B16.10 Face to Face and End to End Dimensions of Valves
* MSS SP-25 Standard Marking System for Valves, Fittings, Flanges and Unions
* Size Range: 2inch -- 48inch / DN50—DN1200
* Pressure rating: ANSI Class150Lb-- 2500Lb / PN16-- PN100
* Materials:
Carbon Steel: ASTM A105, ASTM A216 WCB, ASTM A217 WC6, ASTM A217 WC9, ASTM A217 C5, ASTM A217 C12, ASTM A217 C12A
Stainless Steel: ASTM A351 CF8, ASTM A351 CF8M, ASTM A351 CF3, ASTM A351 CF3M, ASTM A351 CM8, ASTM A890 GR4A, ASTM A890 GR6A
* Test: API598
* Report: CHEMICAL ANALYSIS OF MATERIAL CERTIFAICATE EN 10204 3.1B
