Place of Origin : Dongli,China  
                                                         
Main Parts	Materials
Body:	Cast iron, Ductile iron, Al Bronze, Carbon Steel, Stainless Steel
Seat:	Nature Rubber, NBR, EPDM, Viton, Neoprene, Hypalon, Silicon, PTFE
Shaft:	Stainless Steel, Carbon Steel
Disc:	Plated Ductile Iron, Al Bronze, Stainless Steel, Carbon Steel
Pin:	Stainless Steel, Carbon Steel
Bushing:	PTFE, Lubricated Bronze
O-ring:	NBR, EPDM