h44y, 低温旋启式止回阀, 启式止回阀, 式止回阀, 旋启式止回阀, 止回阀
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2020-09-07 |
技术交流
低温旋启式止回阀
低温旋启式止回阀型号有DH44Y-150Lb、DH44Y-300Lb、DH44Y-600Lb，其常用的阀体材质有A352-LCB、A352-LC3、A351-CF8，密封面一般采用钴基合金，填料则用聚四氟乙烯。
低温旋启式止回阀执行标准
设计及制造标准：BS 1868、BS6364等；
结构长度标准：ANSI B16.10；
法兰尺寸标准：ANSI B16.5；
检验和试验标准：API 598；
DH44Y-150Lb低温旋启式止回阀外形尺寸
| in | dn | d | L | D | D1 | D2 | b | H1 | z-d |
| 1 1/2 | 40 | 38 | 165 | 127 | 98.4 | 73 | 14.5 | 154 | 4-15 |
| 2 | 50 | 51 | 203 | 152 | 120.6 | 92 | 16 | 175 | 4-19 |
| 2 1/2 | 65 | 64 | 216 | 178 | 139.7 | 105 | 17.5 | 177 | 4-19 |
| 3 | 80 | 76 | 241 | 191 | 152.4 | 127 | 24 | 191 | 4-19 |
| 4 | 100 | 102 | 292 | 229 | 190.5 | 157 | 24 | 222 | 8-19 |
| 6 | 150 | 152 | 356 | 279 | 241.3 | 216 | 25.5 | 325 | 8-22 |
| 8 | 200 | 203 | 495 | 343 | 298.4 | 270 | 29 | 383 | 8-22 |
| 10 | 250 | 254 | 622 | 406 | 361.9 | 324 | 30.5 | 448 | 12-25 |
| 12 | 300 | 305 | 698 | 483 | 431.8 | 381 | 32 | 540 | 12-25 |
| 14 | 350 | 357 | 787 | 535 | 476.2 | 413 | 35 | 560 | 12-29 |
DH44Y-300Lb低温旋启式止回阀外形尺寸
| in | dn | d | L | D | D1 | D2 | b | H1 | z-d |
| 1 1/2 | 40 | 38 | 241 | 256 | 114.3 | 73 | 21 | 172 | 4-22 |
| 2 | 50 | 51 | 267 | 265 | 127 | 92 | 22.5 | 198 | 8-19 |
| 2 1/2 | 65 | 64 | 292 | 191 | 149 | 105 | 25.5 | 204 | 8-22 |
| 3 | 80 | 76 | 318 | 210 | 168.3 | 127 | 29 | 222 | 8-22 |
| 4 | 100 | 102 | 356 | 254 | 200 | 157 | 32 | 277 | 8-22 |
| 6 | 150 | 152 | 445 | 318 | 269.9 | 216 | 37 | 346 | 12-22 |
| 8 | 200 | 203 | 533 | 381 | 330 | 270 | 42 | 412 | 12-25 |
| 10 | 250 | 254 | 622 | 445 | 387.5 | 324 | 48 | 465 | 16-29 |
| 12 | 300 | 305 | 711 | 520 | 451 | 381 | 51 | 562 | 16-32 |
低温旋启式止回阀结构图片
