The 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. Dual plate check valve is closed by the spring as soon as flow ceases, before any reverse flow can occur.
Design and manufacture:API594,API 6D,ASME B16.34,DIN3356, JB/T8937
Face to face:API 594,API 6D,DIN3202,JB/T8937
End Flange: ASME B 16.5/ASME 16.47,DIN2543-2545,JB/T9112~24
Pressure Temp: ASME 16.34
Test: API598 , ISO5208，DIN3230, JB/T9092
Special : NACE MR-01-75
Installation: horizontal / vertical with down-up flow direction. In horizontal position, the axis must be placed in vertical position. In vertical position, the plates must be opened in the same flow direction. Downstream, a piping of minimum length 5 times diameter, to be installed before the valve, and a pipe of minimum length 2 times diameter after the valve, to allow stabilization of flow and recovery. Installation between counter flanges.
Application:Water supply ,Heating,conditioning systems,Pumping stations , Waste water treatment plants,Irrigation.
|Suitable medium||W.O.G.etc||HNO3，CH2OOH etc.|
TANA dual plate check valves conform to all industry standards. API 594 dictates valve dimensions, including wall thickness, face-to-face dimensions and OD, so valves can replace any make of ANSI Dual Plate Water Check Valve. TANA Dual Plate Wafer Check Valves are available in sizes up to 60" in Carbon Steel, 316 Stainless Steel and Ductile Iron and in Classes 125, 150, 300 and 600 psi. Available elastomers include Buna N, EPDM, Viton, Metal and 316SS API Trim 10. Valve internal components can be selected to fit your exact application requirements.
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