Standard:

Nominal pressure: 1.0-2.5MPa  Working temp.:0-120 Celsius Degree.

Flanged end:GB/T17241.6 GB9113, Nominal diameter: 50-400mm

Service:water,oils,gas etc..   Inspection and test:GB 13927 API 598

Size:  DN50-DN600

Material:

1    Body: Grey cast iron,ductile cast iron,cast steel
2    Disc:Ductile cast iron packed with rubber or EDPM outside
3    Bolt: Carbonized treatment
4    Gasket: Buna-N rubber or EDPM 
5    Cover: Grey cast iron,ductile cast iron,cast steel 
6    Stem: tainless steel 
7    O-ring: Buna-N rubber or EPDM 
8    Thrust: bearing Gunmetals
9    Bolt: Stainless steel 
10  Gland: ductile cast iron,cast steel 
11  Dust proof gasket: Buna-N rubber 
12   Handwheel: (transmission cap)  Cast iron