產(chǎn)品概述：
DH44Y低溫旋啟式止回閥適用于液氧、液氮、液氬、液化自然氣、液態(tài)二氧化碳、液態(tài)丙烷等-196℃低溫液體。
實(shí)行標(biāo)準(zhǔn)：
| 項(xiàng)目 | 設(shè)計(jì)及制造 | 結(jié)構(gòu)長(zhǎng)度 | 法蘭標(biāo)準(zhǔn) | 檢驗(yàn)與試驗(yàn) |
| 標(biāo)準(zhǔn) | api600 | ansi b16.10 | ansi b16.5 | api598 |
零件材料：
| 零件名稱 | 閥體、閥蓋、閥瓣、閥桿 | 銷軸、螺母 | 雙頭螺母 | 密封面 | 填料 |
| 材料 | a352-lcb a352-lc3 a351-cfb | a182-f304 | cr-mo鋼 | 鉆基合基 | 聚四氟乙烯 |
性能規(guī)范：
| 型號(hào) type | 公稱壓力pn(lb) nominal pressure | 常溫試驗(yàn)壓力 test pressure atmormal temperature | 低溫密封試驗(yàn)壓力(mpa) test pressure of se aling at low temperature | 工作溫度及適用介質(zhì) woking temperature vand applicable medium | |||
| 殼體 shell | 密封 sealing | ||||||
| dh44y-150(lb) | 150 | 3.0 | 0.6 | 0.6 | -46℃，氨、 液氨、丙烷 ammonia,liquid nitrogen,prorane | -101℃乙烯、 二氧化碳 ethylene, carbon dioxide | -196℃甲烷、 液化自然氣 methane liquefied natural gas |
| dh44y-300(lb) | 300 | 7.5 | 0.6 | 0.6 | |||
| dh44y-600(lb) | 600 | 15.0 | 0.6 | 0.6 | |||
形狀及連接尺寸：
| 公稱通徑 | 尺寸 | ||||||||
| mm | in | l | d | d1 | d2 | b | f | n-φd | h |
| dh44y-150lb | |||||||||
| 50 | 2 | 203 | 152 | 120.5 | 92 | 16 | 1.6 | 4-19 | 180 |
| 80 | 3 | 241 | 192 | 152.5 | 127 | 19 | 1.6 | 4-19 | 190 |
| 100 | 4 | 297 | 229 | 190.5 | 157 | 24 | 1.6 | 8-19 | 203 |
| 125 | 5 | 330 | 254 | 216 | 186 | 24 | 1.6 | 8-22 | 229 |
| 150 | 6 | 356 | 279 | 241.5 | 216 | 26 | 1.6 | 8-22 | 257 |
| 200 | 8 | 495 | 342 | 298.5 | 270 | 29 | 1.6 | 8-22 | 292 |
| 250 | 10 | 622 | 406 | 362 | 324 | 31 | 1.6 | 12-25 | 355 |
| 300 | 12 | 698 | 483 | 432 | 381 | 32 | 1.6 | 12-25 | 396 |
| dh44y-300lb | |||||||||
| 50 | 2 | 267 | 165 | 127 | 92 | 23 | 1.6 | 8-19 | 178 |
| 80 | 3 | 318 | 210 | 168.5 | 127 | 29 | 1.6 | 8-22 | 216 |
| 100 | 4 | 356 | 254 | 200 | 157 | 32 | 1.6 | 8-22 | 241 |
| 125 | 5 | 400 | 279 | 235 | 186 | 35 | 1.6 | 8-22 | 267 |
| 150 | 6 | 444 | 318 | 270 | 216 | 37 | 1.6 | 12-22 | 305 |
| 200 | 8 | 533 | 381 | 330 | 270 | 42 | 1.6 | 12-25 | 368 |
| 250 | 10 | 622 | 445 | 387 | 324 | 48 | 1.6 | 16-29 | 394 |
| 300 | 12 | 711 | 521 | 451 | 381 | 51 | 1.6 | 16-32 | 445 |
| dh44y-600lb | |||||||||
| 50 | 2 | 295 | 165 | 127 | 92 | 33 | 6.4 | 8-19 | 203 |
| 80 | 3 | 359 | 210 | 168 | 127 | 36 | 6.4 | 8-22 | 235 |
| 100 | 4 | 435 | 273 | 216 | 157 | 45 | 6.4 | 8-25 | 286 |
| 125 | 5 | 511 | 330 | 266.5 | 186 | 52 | 6.4 | 8-29 | 292 |
| 150 | 6 | 562 | 356 | 292 | 216 | 55 | 6.4 | 12-29 | 330 |
| 200 | 8 | 664 | 419 | 349 | 270 | 63 | 6.4 | 12-32 | 381 |
| 250 | 10 | 791 | 510 | 432 | 324 | 71 | 6.4 | 16-35 | 457 |
| 300 | 12 | 842 | 559 | 489 | 381 | 74 | 6.4 | 20-35 | 584 |
