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截止阀特点介绍:
1、截止阀结构比闸阀简单,制造与维修都比较方便。
2、密封面不易磨损及擦伤,密封性好,启闭时阀瓣与阀体密封面之间无相对滑动,因为磨损与擦伤不严重,密封性能好,使用寿命长。
3、启闭时,阀瓣行程小,因而截止阀高度比闸阀小,但结构长度比闸阀长。
4、启闭力矩大,启闭较费力,启闭时间较长。
5、流体阻力大,因阀体内介质管道较曲折,流体阻力大,动力消耗大。
6、介质流动方向:公称通径DN≤200时,一般采用顺流,介质从阀瓣下方向上流;公称通径≥200时,一般采用逆流,介质从阀瓣上方向下流,以增加密封性能。使用时,截止阀介质只能单方向流动,不能改变流动方向。
截止阀执行标准:
设计标准:GB/T12235-2007
结构长度:GB/T12221-2005
法兰标准:HG/T20592-2009
检验与试验:GB/T13927-2008
主要尺寸 Dimensions of Flanged End | |||||||||||
公称压力Nominal Pressure | Size | Dimension(mm) | |||||||||
DN | L | D(1) | D(2) | C | g | T | t | H | W | n-Ø | |
PN1.6MPa | 15 | 130 | 95 | 95 | 65 | 46 | 14 | 2 | 218 | 120 | 4-14 |
20 | 150 | 105 | 105 | 75 | 56 | 16 | 2 | 258 | 140 | 4-14 | |
25 | 160 | 115 | 115 | 85 | 65 | 16 | 2 | 275 | 160 | 4-14 | |
32 | 180 | 135 | 135 | 100 | 78 | 16 | 2 | 282 | 180 | 4-18 | |
40 | 200 | 145 | 150 | 110 | 84 | 18 | 2 | 330 | 200 | 4-18 | |
50 | 230 | 160 | 165 | 125 | 99 | 20 | 2 | 350 | 240 | 4-18 | |
65 | 290 | 180 | 185 | 145 | 118 | 20 | 2 | 400 | 280 | 8-18 | |
80 | 310 | 195 | 200 | 160 | 132 | 20 | 2 | 355 | 280 | 8-18 | |
100 | 350 | 215 | 220 | 180 | 156 | 22 | 2 | 415 | 320 | 8-18 | |
125 | 400 | 245 | 250 | 210 | 184 | 22 | 2 | 460 | 360 | 8-22 | |
150 | 480 | 280 | 285 | 240 | 211 | 24 | 2 | 510 | 400 | 8-22 | |
200 | 600 | 335 | 340 | 295 | 266 | 24 | 2 | 710 | 400 | 12-22 | |
250 | 650 | 405 | 405 | 355 | 319 | 26 | 2 | 786 | 450 | 12-26 | |
300 | 750 | 460 | 460 | 410 | 370 | 28 | 2 | 925 | 500 | 12-26 | |
350 | 850 | 520 | 520 | 470 | 435 | 34 | 2 | 1075 | 700 | 16-25 | |
400 | 950 | 580 | 580 | 525 | 485 | 36 | 2 | 1235 | 800 | 16-30 | |
450 | 1200 | 640 | 640 | 585 | 545 | 40 | 2 | ˉ | 1000 | 20-30 | |
500 | 1250 | 705 | 705 | 650 | 608 | 44 | 2 | ˉ | 1000 | 20-34 |
主要尺寸 Dimensions of Flanged End | |||||||||||
公称压力Nominal Pressure | Size | Dimension(mm) | |||||||||
DN | L | D(1) | D(2) | C | g | T | t | H | W | n-Ø | |
PN2.5MPa | 15 | 130 | 95 | 95 | 65 | 45 | 16 | 2 | 218 | 120 | 4-14 |
20 | 150 | 105 | 105 | 75 | 55 | 16 | 2 | 260 | 140 | 4-14 | |
25 | 160 | 115 | 115 | 85 | 65 | 16 | 2 | 275 | 160 | 4-14 | |
32 | 180 | 135 | 135 | 100 | 78 | 18 | 2 | 282 | 180 | 4-18 | |
40 | 200 | 145 | 150 | 110 | 85 | 18 | 3 | 332 | 200 | 4-18 | |
50 | 230 | 160 | 165 | 125 | 99 | 20 | 3 | 350 | 240 | 4-18 | |
65 | 290 | 180 | 185 | 145 | 120 | 22 | 3 | 405 | 280 | 8-18 | |
80 | 310 | 195 | 200 | 160 | 135 | 22 | 3 | 360 | 280 | 8-18 | |
100 | 350 | 230 | 235 | 190 | 160 | 24 | 3 | 412 | 320 | 8-23 | |
125 | 400 | 270 | 275 | 220 | 188 | 28 | 3 | 462 | 360 | 8-25 | |
150 | 480 | 300 | 305 | 250 | 218 | 30 | 3 | 510 | 400 | 8-25 | |
200 | 600 | 360 | 365 | 310 | 278 | 34 | 3 | 715 | 400 | 12-25 | |
250 | 650 | 425 | 430 | 370 | 322 | 36 | 3 | 789 | 450 | 12-30 | |
300 | 750 | 485 | 490 | 430 | 390 | 40 | 4 | 925 | 500 | 16-34 | |
350 | 850 | 550 | 555 | 490 | 448 | 44 | 4 | 1025 | 700 | 16-34 | |
400 | 950 | 610 | 615 | 550 | 505 | 48 | 4 | 1235 | 800 | 16-34 | |
450 | 1200 | 660 | 665 | 600 | 555 | 50 | 4 | ˉ | 1000 | 20-34 | |
500 | 1250 | 730 | 735 | 660 | 610 | 52 | 4 | ˉ | 1000 | 20-41 | |
PN4.0MPa | 15 | 130 | 95 | 95 | 65 | 46 | 14 | 2 | 233 | 120 | 4-14 |
20 | 150 | 105 | 105 | 75 | 56 | 16 | 2 | 275 | 140 | 4-14 | |
25 | 160 | 115 | 115 | 85 | 65 | 16 | 2 | 285 | 160 | 4-14 | |
32 | 180 | 135 | 140 | 100 | 78 | 18 | 2 | 305 | 180 | 4-18 | |
40 | 200 | 145 | 150 | 110 | 84 | 18 | 3 | 355 | 200 | 4-18 | |
50 | 230 | 160 | 165 | 125 | 99 | 20 | 3 | 373 | 240 | 4-18 | |
65 | 290 | 180 | 185 | 145 | 118 | 22 | 3 | 408 | 280 | 8-18 | |
80 | 310 | 195 | 200 | 160 | 132 | 24 | 3 | 436 | 320 | 8-18 | |
100 | 350 | 230 | 235 | 190 | 156 | 24 | 3 | 480 | 360 | 8-22 | |
125 | 400 | 270 | 270 | 220 | 184 | 26 | 3 | 558 | 400 | 8-25 | |
150 | 480 | 300 | 300 | 250 | 211 | 28 | 3 | 611 | 400 | 8-26 | |
200 | 600 | 375 | 375 | 320 | 284 | 34 | 3 | 720 | 400 | 12-30 |
主体外形和连接尺寸Main External and Connection Dimension | ||||||||||||
公称压力Nominal Pressure | Size | Dimension(mm) | ||||||||||
DN | d | L | D(1) | D(2) | C | g | T | t | H | W | n-Ø | |
PN6.4MPa | 15 | 15 | 170 | 105 | 110 | 75 | 55 | 18 | 2 | 218 | 140 | 4-14 |
20 | 20 | 190 | 125 | 130 | 90 | 68 | 20 | 2 | 260 | 160 | 4-18 | |
25 | 25 | 210 | 135 | 140 | 100 | 78 | 22 | 2 | 275 | 180 | 4-18 | |
32 | 32 | 230 | 150 | 155 | 110 | 82 | 24 | 2 | 325 | 200 | 4-23 | |
40 | 40 | 260 | 165 | 170 | 125 | 95 | 24 | 3 | 360 | 240 | 4-23 | |
50 | 50 | 300 | 175 | 188 | 135 | 105 | 26 | 3 | 410 | 280 | 4-23 | |
65 | 65 | 340 | 200 | 205 | 160 | 130 | 28 | 3 | 450 | 320 | 8-23 | |
80 | 80 | 380 | 210 | 215 | 170 | 140 | 30 | 3 | 485 | 360 | 8-23 | |
100 | 100 | 430 | 250 | 255 | 200 | 168 | 32 | 3 | 535 | 400 | 8-25 | |
125 | 125 | 500 | 295 | 300 | 240 | 202 | 36 | 3 | 630 | 400 | 8-30 | |
150 | 150 | 550 | 340 | 345 | 280 | 240 | 38 | 3 | 650 | 450 | 8-34 | |
200 | 200 | 650 | 405 | 410 | 345 | 300 | 44 | 3 | 810 | 500 | 12-34 | |
PN10.0MPa | 15 | 15 | 170 | 105 | 110 | 75 | 55 | 20 | 2 | 220 | 120 | 4-14 |
20 | 20 | 190 | 125 | 130 | 90 | 68 | 22 | 2 | 260 | 140 | 4-18 | |
25 | 25 | 210 | 135 | 140 | 100 | 78 | 24 | 2 | 275 | 160 | 4-18 | |
32 | 32 | 230 | 150 | 155 | 110 | 82 | 24 | 2 | 325 | 180 | 4-23 | |
40 | 40 | 260 | 165 | 170 | 125 | 95 | 26 | 3 | 360 | 200 | 4-23 | |
50 | 50 | 300 | 195 | 200 | 145 | 112 | 28 | 3 | 415 | 240 | 4-25 | |
65 | 65 | 340 | 220 | 225 | 170 | 138 | 32 | 3 | 455 | 280 | 8-25 | |
80 | 80 | 380 | 230 | 235 | 180 | 148 | 34 | 3 | 485 | 280 | 8-25 | |
100 | 100 | 430 | 265 | 270 | 210 | 172 | 38 | 3 | 538 | 320 | 8-30 | |
125 | 125 | 500 | 310 | 315 | 250 | 210 | 42 | 3 | 635 | 360 | 8-34 | |
150 | 150 | 550 | 350 | 355 | 290 | 250 | 46 | 3 | 650 | 400 | 12-34 | |
200 | 200 | 650 | 430 | 435 | 360 | 312 | 54 | 3 | 812 | 400 | 12-41 |