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Can different grades of gaskets be used on the left and right sides of the valve?

2017-04-23View Original

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For the relief valves, on the upstream and downstream sides, the pressure ratings are different – can different grades of gasketing be used for each side?
Reply #22017-04-23
How do I choose between flanges WN/M and WN/FM? Aren’t they the same? All of them can be used
Reply #32017-04-23
On the pipeline material table, for flanges WN/M and WN/FM, aren’t all the gaskets of type MFM? Right?
Reply #42017-04-24
Are the flanges on both sides of the valve different?
Reply #52017-04-24
WN/M and WN/FM flanges are matched, with MFM gaskets used. RF flange with RF gasket

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