H42F46衬氟升降立式止回阀
止回阀是一种依靠介质本身的流动而自动启闭阀瓣用来止介质逆向流动的自动阀门。
本厂衬里止回阀基本类型有四种：HG41型法兰连接直通升降式止回阀和HG42型升降立式止回阀、HG44立式止回阀、HG76旋启式止回阀。
设计规范
遵循GB/T 12235，GB/T 12236，API 6D标准
| 序号 | 零件名称 | 灰铸铁 | 铸钢 | 不锈耐酸铸钢 | 超低碳不锈耐酸铸钢 |
| Z | C | P | R | PL | RL |
| 1 | 阀体/阀盖 | HT250 | WCB | CF8 | CF8M | CF3 | CF3M |
| 2 | 阀瓣/阀杆 | 35 | 1Cr13 | 1Cr18Ni9 | 1Cr18Ni12Mo2Ti | 00Cr18Ni10 | 00Cr17Ni14Mo2 |
| 3 | 衬里/阀座 | PCTEF（F3）,FEP（F46）,PFA（可溶F4）,PP,PO |
| 4 | 紧固螺栓 | WCB | 1Cr17Ni2 | 1Cr18Ni9Ti |
| 5 | 螺母 | PTFE（F4） | CF8 | CF8 |
| 公称通经 | L | D | D1 | D2 | f | b | Z-φd | | DN（mm） | NPS（inch） | PN1.0MPa | | 15 | 1/2 | 108 | 95 | 65 | 45 | 2 | 14 | 4-φ14 | | 20 | 3/4 | 117 | 105 | 75 | 55 | 2 | 16 | 4-φ14 | | 25 | 1 | 127 | 115 | 85 | 65 | 2 | 16 | 4-φ14 | | 32 | 5/4 | 140 | 135 | 100 | 78 | 2 | 18 | 4-φ18 | | 40 | 3/2 | 165 | 145 | 110 | 85 | 3 | 18 | 4-φ18 | | 50 | 2 | 203 | 160 | 125 | 100 | 3 | 20 | 4-φ18 | | 65 | 5/2 | 216 | 180 | 145 | 120 | 3 | 20 | 4-φ18 | | 80 | 3 | 241 | 195 | 160 | 135 | 3 | 22 | 4-φ18 | | 100 | 4 | 292 | 215 | 180 | 155 | 3 | 22 | 8-φ18 | | 150 | 6 | 356 | 280 | 240 | 210 | 3 | 24 | 8-φ23 | | 200 | 8 | 495 | 335 | 295 | 265 | 3 | 26 | 8-φ23 | | 250 | 10 | 622 | 390 | 350 | 320 | 3 | 28 | 12-φ23 | | 300 | 12 | 698 | 440 | 400 | 368 | 4 | 28 | 12-φ23 | | 350 | 14 | 787 | 500 | 460 | 428 | 4 | 30 | 16-φ23 | | 400 | 16 | 914 | 565 | 515 | 482 | 4 | 32 | 16-φ25 | | 450 | 18 | 978 | 615 | 565 | 532 | 4 | 32 | 20-φ25 | | 500 | 20 | 978 | 670 | 620 | 585 | 4 | 34 | 20-φ25 | | PN1.6MPa | | 15 | 1/2 | 108 | 95 | 65 | 45 | 2 | 14 | 4-φ14 | | 20 | 3/4 | 117 | 105 | 75 | 55 | 2 | 16 | 4-φ14 | | 25 | 1 | 127 | 115 | 85 | 65 | 2 | 16 | 4-φ14 | | 32 | 5/4 | 140 | 135 | 100 | 78 | 2 | 18 | 4-φ18 | | 40 | 3/2 | 165 | 145 | 110 | 85 | 3 | 18 | 4-φ18 | | 50 | 2 | 203 | 160 | 125 | 100 | 3 | 20 | 4-φ18 | | 65 | 5/2 | 216 | 180 | 145 | 120 | 3 | 20 | 4-φ18 | | 80 | 3 | 241 | 195 | 160 | 135 | 3 | 22 | 8-φ18 | | 100 | 4 | 292 | 215 | 180 | 155 | 3 | 24 | 8-φ18 | | 150 | 6 | 356 | 280 | 240 | 210 | 3 | 28 | 8-φ23 | | 200 | 8 | 495 | 335 | 295 | 265 | 3 | 30 | 12-φ23 | | 250 | 10 | 622 | 405 | 355 | 320 | 4 | 32 | 12-φ25 | | 300 | 12 | 698 | 460 | 410 | 375 | 4 | 34 | 12-φ25 | | 350 | 14 | 787 | 520 | 470 | 435 | 4 | 38 | 16-φ25 | | 400 | 16 | 914 | 580 | 525 | 485 | 4 | 40 | 16-φ30 | | PN2.5MPa | | 15 | 1/2 | 108 | 95 | 65 | 45 | 2 | 16 | 4-φ14 | | 20 | 3/4 | 117 | 105 | 75 | 55 | 2 | 16 | 4-φ14 | | 25 | 1 | 127 | 115 | 85 | 65 | 2 | 16 | 4-φ14 | | 32 | 5/4 | 140 | 135 | 100 | 78 | 2 | 18 | 4-φ18 | | 40 | 3/2 | 165 | 145 | 110 | 85 | 3 | 18 | 4-φ18 | | 50 | 2 | 203 | 160 | 125 | 100 | 3 | 20 | 4-φ18 |
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