產(chǎn)品概述：
高壓截止閥屬于強(qiáng)制密封式閥門，所以在閥門關(guān)閉時(shí)，必須向閥瓣施加壓力，以強(qiáng)制密封面不泄漏。當(dāng)介質(zhì)由閥瓣下方進(jìn)入閥內(nèi)時(shí)，操作力所需要克服的阻力，是閥桿和填料的磨擦力與由介質(zhì)的壓力所產(chǎn)生的推力，關(guān)閥門的力比開閥門的力大，所以閥桿的直徑要大，否則會(huì)發(fā)生閥桿頂彎的故障。
直流式高壓截止閥的啟閉件是塞形的閥瓣，密封面呈平面或錐面，閥瓣沿流體的中心線作直線運(yùn)動(dòng)。閥桿的運(yùn)動(dòng)形式，有升降桿式（閥桿升降，手輪不升降），也有升降旋轉(zhuǎn)桿式（手輪與閥桿一起旋轉(zhuǎn)升降，螺母設(shè)在閥體上）。截止閥只適用于全開和全關(guān)，不允許作調(diào)節(jié)和節(jié)流。
尺寸規(guī)格和重量：
| 6.4MPa | 20 | 190 | 125 | 90 | 51 | 20 | 4-18 | 228 | 160 | 13 |
|
凹凸法蘭 MFM J41H J41Y J41W J41F J41N 64 64P 64R 64I |
||||||||||
| 25 | 210 | 135 | 100 | 58 | 22 | 4-18 | 275 | 180 | 15 | |
| 32 | 230 | 150 | 110 | 66 | 24 | 4-23 | 325 | 200 | 19 | |
| 40 | 260 | 165 | 125 | 76 | 24 | 4-23 | 360 | 240 | 25 | |
| 50 | 300 | 175 | 135 | 88 | 26 | 4-23 | 410 | 280 | 35 | |
| 65 | 340 | 200 | 160 | 110 | 28 | 8-23 | 450 | 320 | 48 | |
| 80 | 380 | 210 | 170 | 121 | 30 | 8-23 | 485 | 360 | 56 | |
| 100 | 430 | 250 | 200 | 150 | 32 | 8-25 | 537 | 400 | 125 | |
| 125 | 500 | 295 | 240 | 176 | 36 | 8-30 | 631 | 400 | 130 | |
| 150 | 550 | 340 | 280 | 204 | 38 | 8-34 | 646 | 450 | 160 | |
| 200 | 650 | 405 | 345 | 260 | 44 | 12-34 | 813 | 500 | 285 | |
| 10.0MPa | 10 | 170 | 100 | 70 | 35 | 20 | 4-14 | 198 | 120 | 6 |
|
凹凸法蘭 MFM J41H J41Y J41W 100 100P 100R 100I |
15 | 170 | 105 | 75 | 40 | 20 | 4-14 | 202 | 140 | 11 |
| 20 | 190 | 125 | 90 | 51 | 22 | 4-18 | 228 | 160 | 13 | |
| 25 | 210 | 135 | 100 | 58 | 24 | 4-18 | 250 | 180 | 14 | |
| 32 | 230 | 150 | 110 | 66 | 24 | 4-23 | 326 | 220 | 16 | |
| 40 | 260 | 165 | 125 | 76 | 26 | 4-23 | 359 | 240 | 30 | |
| 50 | 300 | 195 | 145 | 88 | 28 | 4-25 | 414 | 280 | 50 | |
| 65 | 340 | 220 | 170 | 110 | 32 | 8-25 | 434 | 320 | 65 | |
| 80 | 380 | 230 | 180 | 121 | 34 | 8-25 | 547 | 400 | 100 | |
| 100 | 430 | 265 | 210 | 150 | 38 | 8-30 | 621 | 400 | 116 | |
| 125 | 500 | 310 | 250 | 176 | 42 | 8-34 | 732 | 450 | 150 | |
| 150 | 550 | 350 | 290 | 204 | 46 | 12-34 | 840 | 500 | 300 | |
| 200 | 650 | 430 | 360 | 260 | 54 | 12-41 | 925 | 550 | 600 | |
| 16.0MPa | 15 | 170 | 110 | 75 | 40 | 24 | 4-18 | 148 | 140 | 12 |
|
環(huán)槽法蘭 RTJ J41H J41Y J41W 160 160P 160R 160I |
20 | 190 | 130 | 90 | 51 | 26 | 4-23 | 156 | 160 | 15 |
| 25 | 210 | 140 | 100 | 58 | 28 | 4-23 | 175 | 180 | 17 | |
| 32 | 230 | 165 | 115 | 66 | 30 | 4-25 | 200 | 200 | 21 | |
| 40 | 260 | 175 | 125 | 76 | 32 | 4-27 | 231 | 240 | 31 | |
| 50 | 300 | 215 | 165 | 88 | 36 | 8-25 | 262 | 250 | 53 | |
| 65 | 340 | 245 | 190 | 110 | 44 | 8-30 | 303 | 320 | 70 | |
| 80 | 380 | 260 | 205 | 121 | 46 | 8-30 | 341 | 400 | 100 | |
| 100 | 430 | 300 | 240 | 150 | 48 | 8-34 | 485 | 450 | 120 |
