Double Disc Check Valves, also called wafer check valves are designed to be installed between ANSI 150, 300, 600,900 or 1500LB flanges. These valves should not beinstalled between flanges that contain defects.
Prior to installation, the wafer ends and mating flanges should be inspected to ensure gasket surfaces are free of defects. The piping system must also be checked for proper alignment.
Double Disc Check Valves should never be utilized to realign an existing piping system. Our Dual Plate Check Valves are designed for steady flow conditions and can be installed in either horizontal orvertical (flow upwards) pipelines.
1.5" ~ 60"
(DN40 ~ DN1500)
Class150 ~ Class 900
(PN16 ~ PN150)
-196℃ ~ +560℃
Carbon steel, Stainless steel, Alloy steel, Bronze
Water, Steam, Oil products, Nitric acid, Acetic acid
RF, RTJ, BW
Non-slam principle of operation
Suitable for horizontal and vertical up flow
Good flow characteristic and less pressure drop
BW end Dimension：ASME B16.25
Face to Face and End to End：ASME B16.10
Pressure-temperature ratings：ASME B16.34
Wall Thickness Dimension：API 600, BS 1868
Inspection and Test：API598, API600 or API 6D
Design and Manufacture：Cast Steel Check Valve to BS 1868, ASME B16.34, API 6D
End Flange Dimension：ASME B16.5 ( ASME B 16.47 series B, API 605, ASME B16.47 A Series)
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