應用：
該類型止回閥用于不銹鋼管道系統內，以達到防止流體回流的目的。
技術數據：
若止回閥被安裝在一根垂直的管道內，開啟閥門所需的壓力大約為300-600kpa，最大輸送物料壓力為800kpa，使用溫度范圍根據密封件材質的選擇而不同，一般常用的三元乙丙橡膠（EPDM）是-10℃~+140℃
材質：
鋼制部分：不銹鋼304,≤0Cr18Ni9≥，≤1.4301≥ 不銹鋼316L≤00Cr17Ni14M02≥,≤1.4404≥
密封圈：硅橡膠（VMQ),氟橡膠（FPM) 三元乙丙（EPDM）
| DIN | Size | A | B | L |
| DN15 | 62.5 | 34.0 | 100.0 | |
| DN20 | 62.5 | 34.0 | 100.0 | |
| DN25 | 77.5 | 50.5 | 103.0 | |
| DN32 | 77.5 | 50.5 | 103.0 | |
| DN40 | 89.0 | 50.5 | 105.0 | |
| DN50 | 105.0 | 64.0 | 111.0 | |
| DN65 | 134.0 | 91.0 | 122.0 | |
| DN80 | 145.0 | 106.0 | 130.0 | |
| DN100 | 158.5 | 119.0 | 130.0 |
3A | Size | A | B | B2 | L | L2 | T |
1/2" | 62.5 | 12.7 | 25.4 | 75.0 | 88.6 | 1.65 | |
3/4" | 62.5 | 19.05 | 25.4 | 75.0 | 88.6 | 1.65 | |
1" | 77.5 | 25.4 | 50.5 | 78.0 | 88.6 | 1.65 | |
1 1/2" | 89.0 | 38.1 | 50.5 | 80.5 | 94.3 | 1.65 | |
2" | 105.0 | 50.8 | 64.0 | 86.0 | 105 | 1.65 | |
2 1/2" | 118.5 | 63.5 | 77.5 | 97.0 | 116 | 1.65 | |
3" | 134.0 | 76.2 | 91.0 | 105 | 123.5 | 1.65 | |
4" | 158.5 | 101.6 | 119.0 | 105 | 123.5 | 2.1 |
| SMS/ISO/IDF | Size | 3/4" | 1" | 1 1/4" | 1 1/2" | 2" | 2 1/2" | 3" | 4" | 5" | 6" |
| T | 1.5 | 1.5 | 1.5 | 1.5 | 1.5 | 2.0 | 2.0 | 2.0 | 2.0 | 2.0 |
| DS | Size | 3/4" | 1" | 1 1/4" | 1 1/2" | 2" | 2 1/2" | 3" | 4" | 5" | 6" |
| T | 1.45 | 1.45 | 1.45 | 1.45 | 1.45 | 1.7 | 2.2 | 2.2 | 2.2 | 2.8 |
| RJT | Size | 3/4" | 1" | 1 1/4" | 1 1/2" | 2” | 2 1/2" | 3" | 4" | 5" | 6" |
| B | 19.5 | 25.65 | 32.05 | 38.35 | 51.05 | 63.75 | 76.45 | 101.85 | 127.25 | 152.4 | |
| T | 1.725 | 1.725 | 1.725 | 1.725 | 1.725 | 1.725 | 1.725 | 2.125 | 2.125 | 2.2 |
