Water-sealed gate valves
Water sealed gate valve Characteristics:
1. S/Y Water sealed gate valve series usually use double disks and bi-directional flexible seal, open and close nimbly,reliable for seal.
2. Have simple in structure, compact reasonable, examine and repair conveniently,gate valve operation life long
3. Be used for on and off device on the pipe and must be full open and full closed, can not be used for regulate flow.
4. Gate valves The connection type are flanged and welded, actuator are gear/handle and electrical.
Gate valve Design and manufacture standard:
Design and manufacture:GB12234
Flange size: GB9113 JB7490
Pressure and temperature: JB/T74 GB9131
Welded size:-
Test and inspection: JB/T9092 GB13927
Gate valve Main Function Specification;
| Nominal pressure(MPa) | ||||||
| Shell test | 1.0 | 1.6 | 2.5 | 4.0 | 6.4 | 10.0 |
| Seal test | 1.5 | 2.4 | 3.8 | 6.0 | 9.6 | 15.0 |
| Back seat seal test | 1.1 | 1.8 | 2.8 | 4.4 | 7.0 | 11.0 |
| Gas Seal Test | 1.1 | 1.8 | 2.8 | 4.4 | 7.0 | 11.0 |
| Suitable range | ||||||
| Model | Temperature(℃) | Suitable medium | ||||
| Carbon steel series | ≤425 | Water, steam, oil and Non-caustic gas | ||||
| Alloy series | ≤540 | |||||
Gate Valve Main Parts Material:
| Model | Part Name | |||||
| Body, Bonnet and York | Stem | Plate, Disc and Seal face | Seat Seal face, | Stem Nut | Packing | |
| Carbon steel series (C) | WCB | 1Cr13 or 2Cr13 | Cr13 serise stainless steel or hard alloy | Stainless Steel | Aluminum Bronze | Soft Graphite |
| Alloy series(I) | WCB Cr5Mol | 20Cr1Mo1VA | Co-Alloy | Hard Alloy | Aluminum Bronze | Soft Graphite |
