Main Parts for Material
| Body Bonnet | Wedge disc, seat ring | Stem | Yoke Nut | Packing | Hand wheel |
| Carburizing Steel | High-grade carbon steel+carbide alloy or stainless steel | Cr.stainless steel | Al bronze | Graphite. Asbestos coils | Foraeable cast-iron |
| Cr.Ni.Ti.Steel | Stainless steel or+carbide alloy | Cr.Ni.Ti stainless steel | Al bronze | Dipping polytetrafluoroethylene | Foreable cast-iron |
| Cr,Ni.Ti.Steel | Stainless steel or+ carbide alloy | Cr.Ni.Ti stainless steel | Al bronze | Asbestos coil | Foreable cast-iron |
| Cr,Mo Steel | Alloy steel+carbide alloy | Cr.MoAi steel | Al bronze | Flexible graphite | Foreable cast-iron |
Applicable Specification:
1. design manufacture according to GB/T12234
2. face to face according to GB/T12221
3.end flange dimension according to JB/T79 GB/T9113
4.check and test according to JB/T9092
