wholesale big discount lever type welded ball valve gost standard weld ball valve gas operated valve
|body||carbon steel Q345R||bearing||copper alloy|
|connection pipe||Q345R||branch pipe||carbon steel|
|seat o-ring||FPM||packing gland||304|
|support ring||60si2mn||stop block||304|
|thrust gasket||graphite||hexagonal screw||8.8|
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