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一、立式止回阀H42H-16C/H42W-16P概述:本系列阀门正常处于关闭状态,由于管线中进口端介质的压力作用,而克服弹簧阻力使阀门开启。当进口端介质压力低于出口端时,弹簧将阀芯推向阀座而使阀门关闭,阻止介质逆流,故起止回作用。本阀门由于采用弹簧支撑阀芯,故采用立式安装或卧式装均可。
二、试验参数:
| 型号 | 公称压力 Mpa | 试验压力(Mpa) | 工作温度 | ||
| 强度(水) | 密封(水) | 低压密封(空气) | |||
| H42W-16P/H42H-16C | 1.6 | 2.4 | 1.76 | 0.6 | ≤250℃ | 
| H42W-25P/H42H-25C | 2.5 | 3.75 | 2.8 | 0.6 | ≤250℃ | 
| H42W-40P/H42H-40C | 4.0 | 6.0 | 4.4 | 0.6 | ≤250℃ | 
三、相关连接参数:
| 型号 | DN | 尺寸 | ||||||
| L | D | D2 | D1 | H | b | Z-d | ||
| H42W-16P H42H-16C | 15 | 130 | 95 | 45 | 65 | 77 | 14 | 4-14 | 
| 20 | 150 | 105 | 55 | 75 | 77 | 14 | 4-14 | |
| 25 | 160 | 115 | 65 | 85 | 80 | 16 | 4-14 | |
| 32 | 180 | 135 | 78 | 100 | 85 | 16 | 4-18 | |
| 40 | 200 | 145 | 85 | 110 | 95 | 16 | 4-18 | |
| 50 | 230 | 160 | 100 | 125 | 105 | 16 | 4-18 | |
| 65 | 290 | 180 | 120 | 145 | 120 | 18 | 4-18 | |
| 80 | 310 | 195 | 135 | 160 | 130 | 20 | 8-18 | |
| 100 | 350 | 215 | 155 | 180 | 140 | 20 | 8-18 | |
| 125 | 400 | 245 | 185 | 210 | 155 | 22 | 8-18 | |
| 150 | 480 | 280 | 210 | 240 | 180 | 24 | 8-23 | |
| 200 | 600 | 335 | 265 | 295 | 215 | 26 | 12-23 | |
| H42W-25P H42H-25C | 15 | 130 | 95 | 45 | 65 | 77 | 16 | 4-14 | 
| 20 | 150 | 105 | 55 | 75 | 80 | 16 | 4-14 | |
| 25 | 160 | 115 | 65 | 85 | 85 | 16 | 4-14 | |
| 32 | 180 | 135 | 78 | 100 | 95 | 18 | 8-18 | |
| 40 | 200 | 145 | 85 | 110 | 105 | 18 | 8-18 | |
| 50 | 230 | 160 | 100 | 125 | 120 | 20 | 8-18 | |
| 65 | 290 | 180 | 120 | 145 | 130 | 22 | 8-18 | |
| 80 | 310 | 195 | 135 | 160 | 140 | 22 | 8-18 | |
| 100 | 350 | 215 | 160 | 190 | 155 | 24 | 8-23 | |
| 125 | 400 | 245 | 188 | 220 | 180 | 28 | 8-25 | |
| 150 | 480 | 280 | 218 | 250 | 215 | 30 | 8-25 | |
| 200 | 600 | 335 | 278 | 310 | 973 | 34 | 12-25 | |


