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Contact SupplierWafer type stainless steel swing check valve nps2'-36' class 900-2500
body and bonnet connection
the body and bonnet of class 150-900 check valve are usually wit studs and nuts.and the body and bonnet of class 1500-class 2500 check valves are usually of pressurized seal.
Body-to-bonnet joint
stainless steel flexible graphite wounded gasket is used for class 150 and class 300 check valve;stainless steel flexible is graphite woulded gasket is used for class 600 check valve,and joint gasket is also optional for class 600 check valve;ring joint gasket is used for class 900 check valve;pressurized seal design is used for class 1500- 2500 check valves.