Shanghai Jianggong Valve Manufacturing Co., Ltd.
Shanghai Jianggong Valve Manufacturing Co., Ltd. Industrial valve expert With safe and reliable products To provide you with thoughtful services
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Ductile Iron Soft Seal Double Offset Butterfly Valve For Water Pipeline Use
Product introduction:
The double eccentric butterfly valve is further improved on the basis of the single eccentric butterfly valve and is also the most widely used. Its structural feature is that the valve stem axis deviates from both the center of the butterfly plate and the center of the body. The double eccentricity effect allows the butterfly plate to quickly detach from the valve seat after the valve is opened, greatly eliminating unnecessary excessive compression and scraping between the butterfly plate and the valve seat, reducing the opening resistance distance, reducing wear, and improving the service life of the valve seat. The significant reduction in scraping also allows for the use of metal seats in double eccentric butterfly valves, improving their application in high-temperature fields.
Product technical paramters:
| Technical standard | Design and manufacturing | ISO 10631-1991 GB/T12238-1989 |
| Length structure | ISO 5752*1998 GB/T12221-1989 | |
| Flange connection | GB/T9113-2000 GB/T9113-2000 | |
| Test and inspection | ISO/DIN5208-1987 GB/T13927-1992 | |
| Valve marking | ISO5209-1987 GB12220-1989 | |
| Drive device connection | ISO/DIN5211-1982 GB12223-1989 | |
| Valve supply requirements | ISO/DIN5211-1982 GB/T12252 |
| 1 | Port size | mm | 100-1200 |
| 2 | Pressure nominal | MPa | 1.0/1.6 |
| 3 | Test pressure (MPa) | Strength test (water) | 1.5/2.4 |
| 4 | Sealing test (water) | 1.1/1.76 | |
| 5 | Medium applicable | Fresh water, sewage, seawater, air, etc | |
| 6 | Working temperature | -15~110℃ | |
| 7 | Connection way | Flange | |
| 8 | Driven method | Worm gear, electric and pneumatic actuator | |
Product features:
1. Reasonable design, compact structure, easy installation and disassembly, and easy maintenance.
2. Adopting an eccentric structure to reduce the friction of the sealing ring and extend the service life of the valve.
3 completely sealed, with zero leakage. Can be used for ultra-high vacuum conditions
4. Replace valve plate sealing ring, butterfly plate, shaft and other materials, suitable for various media and different temperatures
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