Bellows forged steel gate valve is an opening and closing member of the gate, the movement direction of the gate is perpendicular to the direction of the fluid, the gate valve can only be used for full open and full closed, can not be used for regulation and throttling. Gate valve through the valve seat and gate contact for sealing, usually the sealing surface will be surfacing metal materials to increase wear resistance, such as surfacing 1Cr13, STL6, stainless steel and so on. There are rigid gate and elastic gate, according to the different gate, the gate valve is divided into rigid gate valve and elastic gate valve.
Bellows forged steel gate valve commonly used material breakdown:
| No | Name of the part | CS toASTM | AS to ASTM | SS to ASTM | |
| TypeAl05 | TypeA182 F22 | Type A182 f304(L) | Type A182 F316(L) | ||
| l | body of a valve | A105 | A182 F22 | A182 F304(L) | A182 F316(L) |
| 2 | valve seat | A276 420 | A276 304 | A276 3040 | A276 316(L) |
| 3 | switch plate | A276 420 | A276 304 | A276 304(L) | A276 316(L) |
| 4 | stem of valve | A182 F6a | A182 F304 | A182 304(L) A182 F316(L) | |
| 5 | bellow | 304 | 304(L) | 316(L) | |
| 6 | bonnets | A105N | A182 F22 | A182 F304fLl | A182 F316(L) |
| 7 | packing material | Flexible graphite | A276 304 | ||
| 8 | Lifting bolts/nuts | A193 B8／A194 2H A193 B8／A194 4 | A193 B8/A194 B A193 V8/A194 8M | ||
| 9 | Packing Pressure Sleeve | A276 420 | A182 F304 | ||
| 10 | Packing Plate | A105N | A182 F304 | ||
| 1l | Valve stem nut | A276 420 | |||
| 12 | handwheels | A197 | |||
| 13 | extensions | A105 A182 F22 Al 82 F304(L) A182 F316(L) | |||
| 14 | lower tractor | A182 F304 A182 F304 A182 F304(L) Al 82 F316(L) | |||
| 15 | upper tractor | A182 F304 A182 F304 | A1 82 F304(L) | A182 F316(L) | |
| 16 | bolts | A276 420 | A182 F304 | ||
| 17 | locknut | A194 2H | A194 4 | A194 8 | A194 8M |
| Applicable medium | Water, vapour, oil, etc. | Water, vapour, oil, etc. | Nitric acid, acetic acid, etc. | ||
| Applicable temperature | -29℃～425℃ | -29℃～550℃ | -29℃～180℃ | ||