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Soft sealing butterfly valve is suitable for water supply & drainage and gas pipeline of foodstuff, pharmacy, petrochemical, petroleum, electric power, light texitle, paper making industries to adjust adn cut off flux when the temperature is ≤120ºC and nominal pressure≤1.6MPa. Its main characteristics are as follows:
1. Novel and resonable design, unique structure, light and quickly start &stop.
2. small operation moment, convenient and skillful operation.
3. it can be mounted at any position, easy to maintain.
4. renewable sealing components and reliable and two-way sealing effect with zero leakage.
5. Aging resistant, anticorrosive and durable sealing material.
Main technical parameters
| Nominal diameter | DN(mm) | 50~2000 | ||
| Nominal pressure | PN(MPa) | 0.6 | 1.0 | 1.6 |
|
test pressure Ps(MPa) |
strength test | 0.9 | 1.5 | 2.4 |
| seal test | 0.66 | 1.1 | 1.76 | |
| gas seal test | 0.6 | 0.6 | 0.6 | |
| applicable media | air, water, sewage, steam, coal gas, oil products, etc. | |||
| driving mode | hand drive, worm wheel drive, pneumatic drive, electric drive. | |||
Materials for main parts
| Part name | Material |
| body | various rubbers, PTFE |
| disc | gray cast iron, ductile cast steel, cast steel, stainless steel and special material |
| seal ring | ductile cast iron, alloy steel, stainless steel |
| stem | 2Cr13, stainless steel |
| packing | O-ring, flexible graphite |
Sealing materials for butterfly valve and applicable temperature
| Material type | Neoprene | Styrene rubber | ethylene propylene rubber | PTFE | silicon rubber | fluorine rubber |
| Code | X | J | YBX | F | GX | FJ |
| Max. temperature | 82ºC | 93ºC | 150ºC | 232ºC | 250ºC | 204ºC |
| Min. temperature | -40ºC | -40ºC | -40ºC | -268ºC | -70ºC | -23ºC |
| applicable working temperature | ≤65ºC | ≤80ºC | ≤120ºC | ≤200ºC | ≤200ºC | ≤180ºC |
Standards for design and manufacturer
design standard:GB/T12238-1989
flange connection dimension:GB/T9113.1-2000;GB/T9115.1-2000;JB78
structure length: GB/12221-1989
pressure test: GB/T13927-1992;JB/T9092-1999
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