Gate valves to API602 (API602 Gate valve series)
 | 1、Design and manufacture conform to API602、BS5352、ANSI B16.34； 2、Connection ends conform to 1）Socket welded dimension conform to ANSI B16.11；JB/T1751 2）Screw ends dimension conform to ANSI B1.20.1；JB/T7306
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