Marine Equipment
Double Flange Butterfly Valve
The Flange Wafer Butterfly Valve is composed of the body, disc, seat, stem and worm gear, used in many industries such as water, steel food, medicine, chemical, oil, power, textile, paper..e...
Double Flange Butterfly Valve
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China Double Flange Butterfly Valve:
The Flange Wafer Butterfly Valve is composed of the body, disc, seat, stem and worm gear, used in many industries such as water, steel food, medicine, chemical, oil, power, textile, paper..etc to adjust the flow rate or intercept the medium in the as or water supply, drainage pipe line.
Standard:
Design Standard：GB/T2238-1989,API609,JIS B2064
Face to Face: GB/T9113.1-2000;GB/T9115.1-2000;JB78
Structure Size Standard:GB/T12221-1989
Pressure Test Standard:GB/T13927-1992;JB/T9092-1999
Technical Specification:
| Nominal Size DN（mm) | 50～2000 | ||
| Nominal Pressure PN（MPa) | 0.6 | 1 | 1.6 |
| Seal Test(MPa) | 0.66 | 1.1 | 1.76 |
| Strength Test (MPa) | 0.9 | 1.5 | 2.4 |
| Applicable Medium | Water, Air, Gas, Oil, Sea Water, Acid and weak corrisive fluid | ||
Main Parts & Material:
| Parts Name | Material |
| Body | Cast Iron, Nodular Iron, Cast Steel,Stainless Steel |
| Disc | Nodular Iron with Galv, Cast Steel,Stainless Steel, Bronze |
| Stem | 2Cr13、Stainless Steel |
| Seal Ring | NBR, PTFE, CR, EPDM,VITION... |
| Packing | O Ring, Flexible Graphite |
Seal Material:
| Seal Material | CR | NBR | EPDM | PTFE | SI | VITON | NR | PA |
| Max Temperature | 82℃ | 93℃ | 150℃ | 232℃ | 250℃ | 204℃ | 85℃ | 93℃ |
| Min Temperature | -40℃ | -40℃ | -40℃ | -268℃ | -70℃ | -23℃ | -20℃ | -73℃ |
| Suitable Service Temperature | 0~+80℃ | -20~+82℃ | -40~+125℃ | -30~+150℃ | -70~+150℃ | -23~+150℃ | -20~+85℃ | -30~+93℃ |
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