Flange Telescopic Butterfly Valve
Flange Telescopic Butterfly Valve
Flange telescopic butterfly valve is used as a flow regulating and fluid-carrying device on industrial pipelines such as petroleum, chemical, electric power, papermaking, water supply and drainage, and municipal construction with a temperature below 425℃ and a nominal pressure below 1.6MPa.
The telescopic butterfly valve can not only compensate for the thermal expansion and contraction caused by the temperature difference of the pipeline, but also provide convenience for the maintenance, installation and replacement of the valve.
| DN | size | Flange dimensions and bolt hole dimensions (standard values) | ||||||||||||||||||
| H | H1 | Design maximum length | Design minimum length | design length | A | B | 0.6MPa | 1.0MPa | 1.6MPa | |||||||||||
| mm | inch | D | D1 | D2 | n-d | D | D1 | D2 | n-d | D | D1 | D2 | n-d | |||||||
| 50 | 2 | 80 | 440 | 164 | 138 | 151 | 250 | 255 | 140 | 110 | 88 | 4-14 | 165 | 125 | 99 | 4-18 | 165 | 125 | 99 | 4-18 |
| 65 | 2 1/2 | 95 | 445 | 190 | 154 | 172 | 250 | 255 | 160 | 130 | 108 | 4-14 | 185 | 145 | 118 | 4-18 | 185 | 145 | 118 | 4-18 |
| 80 | 3 | 98 | 476 | 195 | 163 | 177 | 250 | 255 | 190 | 150 | 124 | 4-18 | 200 | 160 | 132 | 8-18 | 200 | 160 | 132 | 8-18 |
| 100 | 4 | 114 | 504 | 227 | 184 | 206 | 250 | 255 | 210 | 170 | 144 | 4-18 | 220 | 180 | 156 | 8-18 | 220 | 180 | 156 | 8-18 |
| 125 | 5 | 128 | 550 | 254 | 201 | 215 | 250 | 255 | 240 | 200 | 174 | 8-18 | 250 | 210 | 184 | 8-18 | 250 | 210 | 184 | 8-18 |
| 150 | 6 | 139 | 652 | 240 | 195 | 225 | 300 | 315 | 265 | 225 | 199 | 8-18 | 285 | 240 | 211 | 8-22 | 285 | 240 | 211 | 8-22 |
| 200 | 8 | 174 | 732 | 265 | 215 | 245 | 300 | 315 | 320 | 280 | 254 | 8-18 | 340 | 295 | 266 | 8-22 | 340 | 295 | 266 | 12-22 |
| 250 | 10 | 215 | 823 | 295 | 235 | 265 | 300 | 315 | 375 | 335 | 309 | 12-18 | 395 | 350 | 319 | 12-22 | 405 | 355 | 319 | 12-26 |
| 300 | 12 | 245 | 877 | 308 | 254 | 282 | 300 | 315 | 440 | 395 | 363 | 12-22 | 445 | 400 | 370 | 12-22 | 460 | 410 | 370 | 12-26 |
| 350 | 14 | 270 | 932 | 325 | 271 | 300 | 300 | 315 | 490 | 445 | 413 | 12-22 | 505 | 460 | 429 | 16-22 | 520 | 470 | 429 | 16-26 |
| 400 | 16 | 305 | 1047 | 345 | 283 | 314 | 300 | 315 | 540 | 495 | 463 | 16-22 | 565 | 515 | 480 | 16-26 | 580 | 525 | 480 | 16-30 |
| 450 | 18 | 325 | 1092 | 370 | 314 | 340 | 575 | 615 | 595 | 550 | 518 | 16-22 | 615 | 565 | 530 | 20-26 | ||||
Installation precautions:
The telescopic butterfly valve must be placed flat before installation, and must not be bumped at will. It is strictly forbidden to remove the bracket during operation.
The structural length of the telescopic butterfly valve is the minimum length when it leaves the factory. When installing, pull it to the installation length (i.e. the design length).
When the length between the pipelines exceeds the installation length of the telescopic valve, please adjust the pipeline interval and do not force the telescopic butterfly valve to avoid damaging the butterfly valve.
The telescopic butterfly valve can be installed at any time. When used for temperature compensation, after the pipeline is installed, brackets must be added at both ends along the pipeline axis to prevent the telescopic valve from being pulled out.
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