Administer standard
| Design Spec. | Face to Face | Flange End | Test & Check | Marking | Supply |
| GB/T 12237 | GB/T 12221 | JB/T 78; JB/T 79 | GB/T 13927 | GB/T 12220 | JB/T 7928 |
Chief property and specification
| Lining/seat | NO. | Suitbale Temperature | Suitbale medium |
| PTFE(F4) | F4 | ≤180 | All kinds of acid, alkali, salt, aqua regia, organic acid etc strong corrosive medium except molten alkali metals and element fluorin. |
| PCTFE(F3) | F3 | ≤120 | |
| FEP(F46) | F46 | ≤150 | |
| PFA(FA) | FA | ≤180 | |
| PVDE(F2) | F2 | ≤100 | |
| RPTFE(RF4) | FR4 | ≤180 |
Material for main parts
| Part Name | Gray cast iron | cast steel | stainless acid resistant cast steel | super-low Stainless acid resistant cast steel | ||
| Z | C | P | R | Pl | Rl | |
| Dody/cover | HT250 | WCB | CF8 | CF8M | CF3 | CF3M |
| Dall/stem | WCB | CF8 | CF8M | CF3 | CF3M | |
| Lining/seat | PTFE(F4), PCTFE(F3), FEP(F46), PFE(F4) | |||||
| Packing cover | WCB | CF8 | CF8M | CF3 | CF3M | |
| Packing | PTFE(F4) | PTFE(F4) | PTFE(F4) | |||
| Net shelf | 35 | 1Cr18Ni9Ti | 1Cr18Ni9Ti | |||
| Bolt | 35 | 1Cr17Ni2 | 1Cr17Ni2 | |||
| Clamp bolt | 45 | 0Cr18Ni9 | 0Cr18Ni9 | |||
| Handle | WCB | WCB | WCB | |||