Products Component Housing Material:Ductile cast iron conforming to ASTM A-536,Grade 65-45-12 Surface Finish:Standard:Epoxy powder coating Optional:Galvanized(Zinc Plated、HDG)Dip painted Surface color:Variable color for choice Rubber Gasket Standard:EPDM. Optional:Nitrile,Silicone,Fluoroelastomer,Neoprene The sealing mechanism of grooved couplings and mechanical outlets is basically the same,the main structure of the gasket has “C”shape,forming a triple seal function.
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