对夹升降式止回阀
对夹升降式止回阀主要技术参数：
| 型号 | 公称压力PN(MPa) | 试验压力PS(MPa) | 工作温度(℃) | 适用介质 | |
| 壳体 | 密封 | ||||
| SH71W-16P | 1.6 | 2.4 | 1.76 | ≤200 | 水、蒸体、油品等 |
| SH71H-25Q | 2.5 | 3.75 | 2.75 | ≤235 | |
| SH71W-25H | ≤300 | ||||
| SH71W-25P | ≤200 | 硝酸等腐蚀性介质 | |||
| SH71W-40H | 4.0 | 6.0 | 4.4 | ≤300 | 水、蒸体、油品等 |
| SH71W-40P | ≤200 | 硝酸等腐蚀性介质 | |||
| 规格型号 | 阀体 | 阀瓣 | 弹簧 |
| SH71H-16Q、H71H-25Q | QT400-15 | 25 | 50CrCA |
| SH71W-25H、H71W-40H | 2Cr13 | 1Cr13 | 1Cr18Ni9Ti |
| SH71W-16P、H71W-25P | ZG1Cr18Ni9Ti | 1Cr18Ni9Ti | 1Cr18Ni9Ti |
对夹升降式止回阀规格尺寸表:
|
公称压力 |
公称通径 DN |
尺寸（mm） | |||||
| L | D1 | D2 | D3 | D4 | D5 | ||
|
PN1.0MPa PN1.6MPa |
15 | 16 | 52 | 15 | 24 | 31 | 40 |
| 20 | 19 | 62 | 19 | 30 | 40 | 50 | |
| 25 | 22 | 72 | 24 | 35 | 47 | 58 | |
| 32 | 28 | 83 | 31 | 46 | 56 | 68 | |
| 40 | 31.5 | 93 | 39 | 55 | 66 | 78 | |
| 50 | 40 | 108 | 48 | 65 | 78 | 90 | |
| 65 | 46 | 128 | 62 | 80 | 95 | 110 | |
| 80 | 50 | 142 | 76 | 96 | 110 | 128 | |
| 100 | 60 | 162 | 95 | 115 | 132 | 150 | |
| 125 | 90 | 192 | 110 | 125 | 135 | - | |