The check valve prevents backow in the piping system. The pressure of the uid passing through a pipeline opens the valve, while any reversal of ow will close the valve. An important concept in check valves is the cracking pressure which is the minimum dierential upstream pressure between inlet and outlet at which the valve will operate. Typically the check valve is designed for and can therefore be specied for a specic cracking pressure.
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Specifications
Size/Rating: NPS 2-64 / Class 150-2500
Body Materials: Carbon Steel, Stainless Steel, Alloy Steel, Duplex Steel
Trim: Per API600
End: Flange/Weld/Lug/Wafer
Basic Design: API600, BS 1873, BS EN 1868, ASME B16.34, API594
Face to Face/End to End: ASME B16.10
End Dimension: ASME B16.5,MSS SP-44/ASME B16.47, ASME B16.25, EN 1092
Test & Inspection: API598
