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CHECK VALVE
Product description
NPS：DN50-DN500
Class：PN16-PN40
WCB、304、316、WC6、WC9、C5、304L、316L、2205等
Design Rating：GB/T12236
Face to Face：GB/T12221
Flanged Ends：JB/T79、GB/T9113、HG/T20592
Testing：GB/T26480、JB/T9092、GB/T13927
