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微启式蒸汽安全阀
一、A47H微启式蒸汽安全阀 基础知识
微启式安全阀是一种安全保护用阀,它的启闭件受外力作用下处于常闭状态,当设备或管道内的介质压力升高,超过规定值时自动开启,通过向系统外排放介质来防止管道或设备内介质压力超过规定数值。
二、A47H微启式安全阀 解剖图
二、A47H 主要零部件材料:
NO | 零件名称 | 材料 |
1 | 阀体 | WCB |
2 | 阀座 | ZG2Cr13 |
3 | 调节圈 | ZG2Cr13 |
4 | 阀瓣 | 2Cr13 |
5 | 导向套 | 2Cr13 |
6 | 阀盖 | ZG230-450 |
7 | 弹簧 | 50CrVA |
8 | 阀杆 | 2Cr13 |
9 | 扳手 | ZG200-400 |
10 | 调整螺杆 | 45 |
11 | 保护罩 | ZG200-400 |
| 密封面材料 | H堆焊D507,Y堆焊Co基硬质合金 |
三、A47H外形尺寸和连接尺寸:
型号 | 公称通径 | do | D | K | g | g1 | b | f | f1 | Z-ød | DN’’ | D1 | K1 | g2 | g’’ | b1 | f’’ | f1’’ | Z1-ød1 | L | L1 | ≈H |
A47H-16C | 20 | 15 | 105 | 75 | | 55 | 16 | 2 | | 4-14 | 20 | 105 | 75 | 55 | | 16 | 2 | | 4-14 | 100 | 85 | 270 |
25 | 20 | 115 | 85 | | 65 | 16 | 2 | | 4-14 | 25 | 115 | 85 | 65 | | 16 | 2 | | 4-14 | 100 | 85 | 270 | |
32 | 25 | 140 | 100 | | 78 | 18 | 2 | | 4-18 | 32 | 140 | 100 | 78 | | 18 | 2 | | 4-18 | 115 | 100 | 312 | |
40 | 32 | 150 | 110 | | 85 | 18 | 3 | | 4-18 | 40 | 150 | 110 | 85 | | 18 | 3 | | 4-18 | 120 | 110 | 320 | |
50 | 40 | 165 | 125 | | 100 | 20 | 3 | | 4-18 | 50 | 165 | 125 | 100 | | 20 | 3 | | 4-18 | 135 | 120 | 390 | |
65 | 50 | 185 | 145 | | 120 | 20 | 3 | | 4-18 | 65 | 185 | 145 | 120 | | 20 | 3 | | 4-18 | 140 | 130 | 395 | |
80 | 65 | 200 | 160 | | 135 | 20 | 3 | | 8-18 | 80 | 200 | 160 | 135 | | 20 | 3 | | 8-18 | 160 | 135 | 400 | |
100 | 80 | 220 | 180 | | 155 | 22 | 3 | | 8-18 | 100 | 220 | 180 | 155 | | 22 | 3 | | 8-18 | 170 | 160 | 600 | |
125 | 100 | 250 | 210 | | 185 | 22 | 3 | | 8-18 | 125 | 250 | 210 | 185 | | 22 | 3 | | 8-18 | 190 | 190 | 620 | |
150 | 125 | 285 | 240 | | 210 | 24 | 3 | | 8-23 | 150 | 285 | 240 | 210 | | 24 | 3 | | 8-23 | 205 | 195 | 625 | |
200 | 150 | 340 | 295 | | 265 | 26 | 3 | | 12-23 | 200 | 340 | 295 | 265 | | 26 | 3 | | 12-23 | 240 | 230 | 798 | |
250 | 200 | 405 | 355 | | 320 | 30 | 3 | | 12-26 | 250 | 405 | 355 | 320 | | 30 | 3 | | 12-26 | 350 | 320 | 981 | |
300 | 250 | 460 | 410 | | 375 | 30 | 4 | | 12-26 | 300 | 460 | 410 | 375 | | 30 | 4 | | 12-26 | 350 | 320 | 1005 | |
A47H-25 | 20 | 15 | 105 | 75 | | 55 | 16 | 2 | | 4-14 | 20 | 105 | 75 | 55 | | 16 | 2 | | 4-14 | 100 | 85 | 270 |
25 | 20 | 115 | 85 | | 65 | 16 | 2 | | 4-14 | 25 | 115 | 85 | 65 | | 16 | 2 | | 4-14 | 100 | 85 | 270 | |
32 | 25 | 140 | 100 | | 78 | 18 | 2 | | 4-18 | 32 | 140 | 100 | 78 | | 18 | 2 | | 4-18 | 115 | 100 | 312 | |
40 | 32 | 150 | 110 | | 85 | 18 | 3 | | 4-18 | 40 | 150 | 110 | 85 | | 18 | 3 | | 4-18 | 120 | 110 | 320 | |
50 | 40 | 165 | 125 | | 100 | 20 | 3 | | 4-18 | 50 | 165 | 125 | 100 | | 20 | 3 | | 4-18 | 135 | 120 | 390 | |
65 | 50 | 185 | 145 | | 120 | 22 | 3 | | 8-18 | 65 | 185 | 145 | 120 | | 20 | 3 | | 4-18 | 140 | 130 | 395 | |
80 | 65 | 200 | 160 | | 135 | 24 | 3 | | 8-18 | 80 | 200 | 160 | 135 | | 20 | 3 | | 8-18 | 160 | 135 | 400 | |
100 | 80 | 230 | 190 | | 160 | 24 | 3 | | 8-23 | 100 | 220 | 180 | 155 | | 20 | 3 | | 8-18 | 170 | 160 | 600 | |
125 | 100 | 270 | 220 | | 188 | 28 | 3 | | 8-26 | 125 | 250 | 210 | 185 | | 22 | 3 | | 8-18 | 190 | 190 | 620 | |
150 | 125 | 300 | 250 | | 218 | 30 | 3 | | 8-26 | 150 | 285 | 240 | 210 | | 24 | 3 | | 8-23 | 205 | 195 | 625 | |
200 | 150 | 360 | 310 | | 278 | 34 | 3 | | 12-26 | 200 | 340 | 295 | 265 | | 26 | 3 | | 12-23 | 240 | 230 | 798 | |
250 | 200 | 425 | 370 | | 332 | 36 | 3 | | 12-30 | 250 | 405 | 355 | 320 | | 30 | 3 | | 12-26 | 350 | 320 | 981 | |
300 | 250 | 485 | 430 | | 390 | 40 | 4 | | 16-30 | 300 | 460 | 410 | 375 | | 30 | 4 | | 12-26 | 350 | 320 | 1005 | |
A47H-40 | 20 | 15 | 105 | 75 | 51 | 55 | 16 | 2 | 4 | 4-14 | 20 | 105 | 75 | 55 | | 16 | 2 | | 4-14 | 100 | 85 | 270 |
25 | 20 | 115 | 85 | 58 | 65 | 16 | 2 | 4 | 4-14 | 25 | 115 | 85 | 65 | | 16 | 2 | | 4-14 | 100 | 85 | 270 | |
32 | 25 | 140 | 100 | 66 | 78 | 18 | 2 | 4 | 4-18 | 32 | 140 | 100 | 78 | | 18 | 2 | 4-18 | 115 | 100 | 312 | ||
40 | 32 | 150 | 110 | 76 | 85 | 18 | 3 | 4 | 4-18 | 40 | 150 | 110 | 85 | | 18 | 3 | | 4-18 | 120 | 110 | 320 | |
50 | 40 | 165 | 125 | 88 | 100 | 20 | 3 | 4 | 4-18 | 50 | 165 | 125 | 100 | | 20 | 3 | | 4-18 | 135 | 120 | 390 | |
65 | 50 | 185 | 145 | 110 | 120 | 22 | 3 | 4 | 8-18 | 65 | 185 | 145 | 120 | | 20 | 3 | | 4-18 | 140 | 130 | 395 | |
80 | 65 | 200 | 160 | 121 | 135 | 22 | 3 | 4 | 8-18 | 80 | 200 | 160 | 135 | | 20 | 3 | | 8-18 | 160 | 135 | 400 | |
100 | 80 | 235 | 190 | 150 | 160 | 24 | 3 | 4.5 | 8-23 | 100 | 220 | 180 | 155 | | 22 | 3 | | 8-18 | 170 | 160 | 600 | |
125 | 100 | 270 | 220 | 176 | 188 | 28 | 3 | 4.5 | 8-26 | 125 | 250 | 210 | 185 | | 22 | 3 | | 8-18 | 190 | 190 | 620 | |
150 | 125 | 300 | 250 | 204 | 218 | 30 | 3 | 4.5 | 8-26 | 150 | 285 | 240 | 210 | | 24 | 3 | | 8-23 | 205 | 195 | 625 | |
200 | 150 | 375 | 320 | 260 | 282 | 38 | 3 | 4.5 | 12-30 | 200 | 340 | 295 | 265 | | 26 | 3 | | 12-23 | 240 | 230 | 798 | |
250 | 200 | 450 | 385 | 313 | 345 | 42 | 3 | 4.5 | 12-34 | 250 | 405 | 355 | 320 | | 30 | 3 | | 12-26 | 350 | 320 | 981 | |
300 | 250 | 515 | 450 | 364 | 408 | 46 | 4 | 4.5 | 16-34 | 300 | 460 | 410 | 375 | | 30 | 4 | | 12-26 | 350 | 320 | 1005 | |
A47H-64 A47Y-64 | 20 | 15 | 130 | 90 | 51 | 68 | 20 | 2 | 4 | 4-18 | 20 | 105 | 75 | 55 | 51 | 16 | 2 | 4 | 4-14 | 100 | 95 | 301 |
25 | 20 | 140 | 100 | 58 | 78 | 22 | 2 | 4 | 4-18 | 25 | 115 | 85 | 65 | 58 | 16 | 2 | 4 | 4-14 | 100 | 95 | 301 | |
32 | 25 | 155 | 110 | 66 | 82 | 24 | 2 | 4 | 4-23 | 32 | 140 | 100 | 78 | 66 | 18 | 2 | 4 | 4-18 | 115 | 105 | 312 | |
40 | 32 | 170 | 125 | 76 | 95 | 24 | 3 | 4 | 4-23 | 40 | 150 | 110 | 85 | 76 | 18 | 3 | 4 | 4-18 | 135 | 115 | 366 | |
50 | 40 | 180 | 135 | 88 | 105 | 26 | 3 | 4 | 4-23 | 50 | 165 | 125 | 100 | 88 | 20 | 3 | 4 | 4-18 | 160 | 125 | 396 | |
65 | 50 | 205 | 160 | 110 | 130 | 28 | 3 | 4 | 8-23 | 65 | 185 | 145 | 120 | 110 | 22 | 3 | 4 | 8-18 | 175 | 160 | 570 | |
80 | 65 | 215 | 170 | 121 | 140 | 30 | 3 | 4 | 8-23 | 80 | 200 | 160 | 135 | 121 | 22 | 3 | 4 | 8-18 | 175 | 160 | 565 | |
100 | 80 | 250 | 200 | 150 | 168 | 32 | 3 | 4.5 | 8-26 | 100 | 235 | 190 | 160 | 150 | 24 | 3 | 4.5 | 8-23 | 190 | 180 | 597 | |
150 | 100 | 345 | 280 | 204 | 240 | 38 | 3 | 4.5 | 8-34 | 150 | 300 | 250 | 218 | 204 | 30 | 3 | 4.5 | 8-26 | 280 | 260 | 738 | |
A47H-100 A47Y-100 | 20 | 15 | 130 | 90 | 51 | 68 | 22 | 2 | 4 | 4-18 | 20 | 105 | 75 | 55 | 51 | 16 | 2 | 4 | 4-14 | 100 | 95 | 301 |
25 | 20 | 140 | 100 | 58 | 78 | 24 | 2 | 4 | 4-18 | 25 | 115 | 85 | 65 | 58 | 16 | 2 | 4 | 4-14 | 100 | 95 | 301 | |
32 | 25 | 155 | 110 | 66 | 82 | 24 | 2 | 4 | 4-23 | 32 | 140 | 100 | 78 | 66 | 18 | 2 | 4 | 4-18 | 115 | 105 | 312 | |
40 | 32 | 170 | 125 | 76 | 95 | 26 | 3 | 4 | 4-23 | 40 | 150 | 110 | 85 | 76 | 18 | 3 | 4 | 4-18 | 135 | 115 | 366 | |
50 | 40 | 195 | 145 | 88 | 112 | 28 | 3 | 4 | 4-26 | 50 | 165 | 125 | 100 | 88 | 20 | 3 | 4 | 4-18 | 160 | 125 | 396 | |
65 | 50 | 220 | 170 | 110 | 138 | 32 | 3 | 4 | 8-26 | 65 | 185 | 145 | 120 | 110 | 22 | 3 | 4 | 8-18 | 175 | 160 | 570 | |
80 | 65 | 230 | 180 | 121 | 148 | 34 | 3 | 4 | 8-26 | 80 | 200 | 160 | 135 | 121 | 22 | 3 | 4 | 8-18 | 175 | 160 | 565 | |
100 | 80 | 265 | 210 | 150 | 172 | 38 | 3 | 4.5 | 8-30 | 100 | 235 | 190 | 160 | 150 | 24 | 3 | 4.5 | 8-23 | 190 | 180 | 597 | |
150 | 100 | 355 | 290 | 204 | 250 | 46 | 3 | 4.5 | 12-34 | 150 | 300 | 250 | 218 | 204 | 30 | 3 | 4.5 | 8-26 | 280 | 260 | 738 |
五、的安装和维护应注意以下事项:
各种安全阀都应垂直安装。
安全阀出口处应无阻力,避免产生受压现象。
安全阀在安装前应专门测试,并检查其官密封性。
对使用中的安全阀应作定期检查。
安全阀安装应符合下列要求:
(l)额定蒸发量大于0.5t/h的锅炉,至少装设两个安全阀:额定蒸发量小于或等于0.5t/h的锅炉,至少装一个安全阀。可分
式省煤器出口处、蒸汽过热器出口处都必须装设安全阀。
(2)安全阀应垂直安装在锅商、集箱的zui高位置。在安全阀和锅筒或集箱之间,不得装有取用蒸汽的出口管和阀门。
(3)要有防止重锤自行移动的装置和限制杠杆越轨的导架,弹簧式安全阀要有提升手把和防止随便拧动调整螺钉的装置。
(4)对于额定蒸汽压力小于或等于3.82MPa的锅炉,安全阀喉径不应小于25mm:对于额定蒸汽压力大于3.82MPa的锅炉,安全阀喉径不应小于20mm。
(5)安全阀与锅炉的连接管,其截面积应不小于安全阀的进口截面积。如果几个安全阀共同装设在一根与锅筒直接相连的短管上,短管的通路截面积应不步于所有安全阀排汽面积的1.25倍。
(6)安全阀一般应装设排汽管,排汽管应直通安全地点,并有足够的截面积,保证排汽畅通。安全阀排气管底部应装腔 作势有接到安全地点的疏水管,在排气管和疏水管上都不允许装设阀门。
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