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Safety Back-Flow Valve
Safety back-flow valve applications
The valve is to be used in liquid reflux pipelines in the liquefied petroleum gas pump outlet with operation temperature of -40~+80℃. It is used for the safe reflux of over-pressure medium. When the pump front pressure exceeds regulated value, the valve will open automatically and reflux to the tank so as to ensure the safe operation of equipments and pipelines.
Safety back-flow valve brief figure of structure
Safety back-flow valve dimensions (mm)
Nominal diameter DN(mm) |
Dimension (mm) | ||||||
| D | D1 | D2 | b | z-￠d | L | H | |
| 40 | 150 | 110 | 85 | 16 | 4-19 | 200 | 236 |
| 50 | 165 | 125 | 100 | 16 | 4-18 | 230 | 266 |
| 65 | 185 | 145 | 120 | 20 | 4-18 | 290 | 430 |
| 80 | 200 | 160 | 135 | 20 | 8-18 | 310 | 490 |
| 100 | 215 | 180 | 155 | 22 | 8-18 | 350 | 548 |
| 150 | 280 | 240 | 210 | 24 | 8-23 | 480 | 706 |
| Nominal Diameter DN (mm) |
AH42F-16C/P Dimensions (mm) | Weight (Kg) |
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| L | L1 | D | D1 | D2 | b | f | Z-￠d | DN’ | D’ | D1’ | D2’ | b’ | f’ | Z-￠d’ | H | do | ||
| 25 | 100 | 95 | 115 | 85 | 65 | 14 | 2 | 4-￠14 | 32 | 140 | 100 | 78 | 16 | 3 | 4-￠18 | 250 | 15 | 12 |
| 32 | 115 | 100 | 140 | 100 | 78 | 16 | 2 | 4-￠18 | 40 | 150 | 110 | 85 | 16 | 3 | 4-￠18 | 280 | 20 | 14 |
| 40 | 120 | 110 | 150 | 110 | 85 | 16 | 3 | 4-￠18 | 50 | 165 | 125 | 100 | 16 | 3 | 4-￠18 | 290 | 25 | 16 |
| 50 | 135 | 120 | 165 | 125 | 100 | 16 | 3 | 4-￠18 | 65 | 185 | 145 | 120 | 18 | 3 | 4--￠18 | 341 | 32 | 21 |
| 80 | 170 | 135 | 200 | 160 | 135 | 18 | 3 | 8-￠18 | 100 | 220 | 180 | 155 | 20 | 3 | 8-￠18 | 470 | 50 | 43 |
| 100 | 205 | 160 | 220 | 180 | 155 | 20 | 3 | 8-￠18 | 125 | 250 | 210 | 185 | 22 | 3 | 8-￠18 | 580 | 65 | 65 |
| 150 | 250 | 210 | 285 | 240 | 210 | 24 | 3 | 8-￠22 | 175 | 315 | 270 | 240 | 26 | 3 | 8-￠23 | 670 | 100 | 110 |