Soft Seal Butterfly Valve introductions
Soft sealing butterfly valve is suitable for temperature ≤ 120 ℃, nominal pressure ≤ 16MPa food, medicine, chemical, petroleum, electric power, metallurgy, city construction, textile, paper and other water supply and drainage, gas piping, to make adjustments on the flow and closure of media. Its main features are:
1、Novel and reasonable design, unique structure, light weight, open and close quickly.
2、Operating torque is small, easy to operate, labor-saving smart.
3、can be installed in any position and easy to maintain.
4、Sealing parts can be replaced, sealing performance is reliable and to achieve two-way sealing zero leakage.
5、anti-aging, corrosion resistance sealing materials, long service life and so on.
adopting standard :
design standard：GB/T12238-1989；
lS0 10631-1994 or BS EN593-1998
flange connecting dimensions GB/T17241．6-1998：
IS0 7005-2 or BSEN 1092-2002
face to face dimensions: GB/T1 2221-1989：
lS0 5752-1988 or BS EN558-1
pressure test：GB/T13927-1 992；JB/T9092-1999；
lS0 5028-1993 or BS 6755-l-1986
main technical parameters
| nominal diameter | DN(mm) | 50～2000 | ||
| nominal pressure | PN(MPa) | 0.6 | 1.O | 1.6 |
| test pressure Ps(MPa) | intensity test | 0.9 | 1.5 | 2.4 |
| sealing test | O.66 | 1.1 | 1.76 | |
| apllicable medium | Air, water, sewage, steam, gas, oil, etc. | |||
| driving mode | Manual, worm gear transmission, gas transmission, electricity transmission | |||
the materials of main parts
| part name | material |
| body | Ductile cast iron, cast steel, alloy steel, stainless steel |
| disc | Gray cast iron, ductile cast steel, cast steel, stainless steel and special materials |
| sealing ring | All kinds of rubber, PTFE |
| stem | 2Cr13， SS |
| packing | “O”-ring, flexible graphite |
main sealing materials
| material variety | neoprene | NBR | EPDM | PTFE | silicone rubber | fluororubber |
| code | × or J | XA or JA | XB or JB | xC, JC 0r F | XD or JD | × E or JE |
| the highest temperature resistance | 82℃ | 93℃ | 150℃ | 232℃ | 250℃ | 204℃ |
| the lowest temperature resistance | -40℃ | -40℃ | -40℃ | -268℃ | -70℃ | -23℃ |
| applicable working temperature | ≤65℃ | ≤80℃ | ≤120℃ | ≤200℃ | ≤200℃ | ≤180℃ |
