J41H-16C,J41H-25,J41H-40,J41H-64,J41H-100,J41H-160法蘭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。
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)入閥門時(shí),操作力所需要克服的阻力,是閥桿和填料的摩擦力與由介質(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。近年來,從自密封的閥門出現(xiàn)后,截止閥的介質(zhì)流向就改由閥瓣上方進(jìn)入閥腔,這時(shí)在介質(zhì)壓力作用下,關(guān)閥門的力小,而開閥門的力大,閥桿的直徑可以相應(yīng)地減少。同時(shí),在介質(zhì)作用下,這種形式的閥門也較嚴(yán)密。我國(guó)閥門“三化給”曾規(guī)定,截止閥的流向,一律采用自上而下。
截止閥開啟時(shí),閥瓣的開啟高度,為公稱直徑的25%~30%時(shí),流量已達(dá)到zui大,表示閥門已達(dá)全開位置。所以截止閥的全開位置,應(yīng)由閥瓣的行程來決定。
截止閥主要尺寸
2.5MPa | DN | L | D | D1 | D2 | B | n-φd | H | D0 |
凸面法蘭 | 10 | 130 | 90 | 60 | 40 | 16 | 4-φ14 | 198 | 120 |
15 | 130 | 95 | 65 | 45 | 16 | 4-φ14 | 218 | 120 | |
20 | 150 | 105 | 75 | 55 | 16 | 4-φ14 | 258 | 140 | |
25 | 160 | 115 | 85 | 65 | 16 | 4-φ14 | 275 | 140 | |
32 | 180 | 135 | 100 | 78 | 18 | 4-φ18 | 280 | 160 | |
40 | 200 | 145 | 110 | 85 | 18 | 4-φ18 | 330 | 180 | |
50 | 230 | 160 | 125 | 100 | 20 | 4-φ18 | 350 | 200 | |
65 | 290 | 180 | 145 | 120 | 22 | 8-φ18 | 400 | 280 | |
80 | 310 | 195 | 160 | 135 | 22 | 8-φ18 | 355 | 280 | |
100 | 350 | 230 | 190 | 160 | 24 | 8-φ23 | 415 | 320 | |
125 | 400 | 270 | 220 | 188 | 28 | 8-φ25 | 460 | 360 | |
150 | 480 | 300 | 250 | 218 | 30 | 8-φ25 | 510 | 450 | |
200 | 600 | 360 | 3lO | 278 | 34 | 12-φ25 | 710 | 500 | |
250 | 650 | 425 | 370 | 332 | 36 | 12-φ30 | 786 | 550 | |
300 | 750 | 485 | 430 | 390 | 40 | 16-φ30 | 925 | 600 | |
350 | 850 | 550 | 490 | 448 | 44 | 16-φ34 | 1075 | 700 | |
400 | 950 | 610 | 550 | 505 | 48 | 16-φ34 | 1235 | 800 | |
450 | 1200 | 660 | 600 | 555 | 50 | 20-φ34 | - | 1000 | |
500 | 1250 | 730 | 660 | 61O | 52 | 20-φ41 | - | 1000 |
主要尺寸
4.OMPa | DN | L | D | Dl | D2 | D6 | b | n-φd | H | DO |
凹凸法蘭 | 10 | 130 | 90 | 60 | 41 | 35 | 14 | 4-φ14 | 198 | 120 |
15 | 130 | 95 | 65 | 45 | 40 | 16 | 4-φ14 | 233 | 120 | |
20 | 150 | 105 | 75 | 55 | 51 | 16 | 4-φ14 | 275 | 140 | |
25 | 160 | 115 | 85 | 65 | 58 | 16 | 4-φ14 | 285 | 160 | |
32 | 180 | 135 | 100 | 78 | 66 | 18 | 4-φ18 | 302 | 160 | |
40 | 200 | 145 | 110 | 85 | 76 | 18 | 4-φ18 | 355 | 200 | |
50 | 230 | 160 | 125 | 100 | 88 | 20 | 4-φ18 | 373 | 200 | |
65 | 290 | 180 | 145 | 120 | 110 | 22 | 8-φ18 | 408 | 280 | |
80 | 310 | 195 | 160 | 135 | 121 | 22 | 8-φ18 | 436 | 280 | |
100 | 350 | 230 | 190 | 160 | 150 | 24 | 8-φ23 | 480 | 320 | |
125 | 400 | 270 | 220 | 188 | 176 | 28 | 8-φ25 | 588 | 360 | |
150 | 480 | 300 | 250 | 218 | 204 | 30 | 8-φ25 | 611 | 400 | |
200 | 600 | 375 | 320 | 282 | 260 | 38 | 12-φ30 | 720 | 400 | |
6.4MPa | 15 | 170 | 105 | 75 | 55 | 40 | 18 | 4-φ14 | 195 | 400 |
凹凸法蘭 | 20 | 190 | 125 | 90 | 68 | 51 | 20 | 4-φ18 | 228 | 160 |
25 | 210 | 135 | 100 | 78 | 58 | 22 | 4-φ18 | 275 | 180 | |
32 | 230 | 150 | 110 | 82 | 66 | 24 | 4-φ23 | 325 | 200 | |
40 | 260 | 165 | 125 | 95 | 76 | 24 | 4-φ23 | 360 | 240 | |
50 | 300 | 175 | 135 | 105 | 88 | 26 | 4-φ23 | 4lO | 280 | |
65 | 340 | 200 | 160 | 130 | 110 | 28 | 8-φ23 | 450 | 320 | |
80 | 380 | 210 | 170 | 140 | 121 | 30 | 8-φ23 | 485 | 360 | |
100 | 430 | 250 | 200 | 168 | 150 | 32 | 8-φ25 | 537 | 400 | |
125 | 500 | 295 | 240 | 202 | 176 | 36 | 8-φ30 | 631 | 400 | |
150 | 550 | 340 | 280 | 240 | 204 | 38 | 8-φ34 | 646 | 450 | |
200 | 650 | 405 | 345 | 300 | 260 | 44 | 12-φ34 | 813 | 500 | |
10.0MPa | 10 | 170 | 100 | 70 | 50 | 35 | 20 | 4-φ14 | 198 | 140 |
凹凸法蘭 | 15 | 170 | 105 | 75 | 55 | 40 | 20 | 4-φ14 | 202 | 140 |
20 | 190 | 125 | 90 | 68 | 51 | 22 | 4-φ18 | 228 | 160 | |
25 | 210 | 135 | 100 | 78 | 58 | 24 | 4-φ18 | 250 | 180 | |
32 | 230 | 150 | 110 | 82 | 66 | 24 | 4-φ23 | 326 | 200 | |
40 | 260 | 165 | 125 | 95 | 76 | 26 | 4-φ23 | 360 | 240 | |
50 | 300 | 195 | 145 | 112 | 88 | 28 | 4-φ25 | 414 | 280 | |
65 | 340 | 220 | 170 | 138 | 110 | 32 | 8-φ25 | 434 | 320 | |
80 | 380 | 230 | 180 | 148 | 121 | 34 | 8-φ25 | 547 | 360 | |
100 | 430 | 265 | 2lO | 172 | 150 | 38 | 8-φ30 | 621 | 400 | |
125 | 500 | 310 | 250 | 210 | 176 | 42 | 8-φ34 | 732 | 400 | |
150 | 550 | 350 | 290 | 250 | 204 | 46 | 12-φ34 | 840 | 450 | |
200 | 650 | 430 | 360 | 312 | 260 | 54 | 12-φ41 | 925 | 500 | |
16.0MPa | 15 | 170 | 110 | 75 | 52 | 40 | 24 | 4-φ18 | 148 | 140 |
凹凸法蘭 | 20 | 190 | 130 | 90 | 62 | 51 | 26 | 4-φ23 | 158 | 160 |
25 | 210 | 140 | 100 | 72 | 58 | 28 | 4-φ23 | 175 | 180 | |
32 | 230 | 165 | 115 | 85 | 66 | 30 | 4-φ25 | 200 | 200 | |
40 | 260 | 175 | 125 | 92 | 76 | 32 | 4-φ27 | 231 | 240 | |
50 | 300 | 215 | 165 | 132 | 88 | 36 | 8-φ25 | 262 | 280 | |
65 | 340 | 245 | 190 | 152 | 110 | 44 | 8-φ30 | 303 | 320 | |
80 | 380 | 260 | 205 | 168 | 121 | 46 | 8-φ30 | 341 | 360 | |
100 | 430 | 300 | 240 | 200 | 150 | 48 | 8-φ34 | 485 | 400 |