H71H/W對(duì)夾升降式止回閥由閥體、閥瓣、彈簧等組成，水平或垂直安裝于管路系統(tǒng)，防止介質(zhì)倒流，具有結(jié)構(gòu)短、體積小、質(zhì)量輕；閥瓣關(guān)閉快速，水錘壓力?。涣鞯劳〞?，流體阻力??；動(dòng)作靈敏，密封性能好。
對(duì)夾升降式止回閥主要技術(shù)參數(shù)
| 型號(hào) | 公稱通徑 | 試驗(yàn)壓力 | 工作溫度 | 適用溫度 | |
| 殼體 | 密封 | ||||
| H71H-16Q | 1.6 | 2.4 | 1.76 | ≤235℃ | 水、蒸氣、油品等 |
| H71H-25Q | 2.5 | 3.75 | 2.75 | ≤235℃ | |
| H71W-25H | ≤300℃ | ||||
| H71W-25P | ≤200℃ | 硝酸等腐蝕性介質(zhì) | |||
| H71W-40H | 4.0 | 6.0 | 4.4 | ≤300℃ | |
| H71W-40P | ≤200℃ | 水、蒸氣 | |||
| 型號(hào) | 閥門 | 閥瓣 | 彈簧 |
| H71H-16Q H71H-25Q | QT400-15 | 25 | 50CrVA |
| H71W-25H H71W-40H | 2Cr13 | 1Cr13 | 1Cr18Ni9 |
| H71W-25P H71W-40P | ZG1Cr18Ni9Ti | 1Cr18Ni9Ti | 1Cr18Ni9Ti |
| 公稱通徑 | L | D | 公稱通徑 | L | D | ||||
| 1.6 | 2.5 | 4.0 | 1.6 | 2.5 | 4.0 | ||||
| 15 | 25 | 48 | 48 | 48 | 80 | 71 | 140 | 140 | 140 |
| 20 | 31.5 | 58 | 58 | 58 | 100 | 80 | 160 | 165 | 165 |
| 25 | 35.5 | 68 | 68 | 68 | 125 | 110 | 190 | 195 | 195 |
| 32 | 40 | 80 | 80 | 870 | 150 | 125 | 215 | 225 | 225 |
| 40 | 45 | 90 | 90 | 90 | 200 | 160 | 270 | 285 | 390 |
| 50 | 56 | 105 | 105 | 105 | 250 | 200 | 330 | 340 | 350 |
| 65 | 63 | 125 | 125 | 125 | 300 | 250 | 385 | 400 | 415 |
