Standard: ISO2531, EN545
Center Sleeve: Steel/ Ductile iron GGG500-7
End Rings: Ductile iron
Gasket: Rubber E.P.D.M./SBR/NR
Bolts,Nuts and Washers are in carbon steel Grade 4.8,8.8 with zinc plated
All the couplings are assembled by " D " bolts.
Body coating: Fusion epoxy
Package: Bubble plastic bags, cartons and wooden cases or per as customers' request