GAH42F LPG BACK FLOW SAFETY VALVE / SAFETY REFLUX VALVE
GAH42Fsafety valve or called Safety Reflux Valve, is often mounted on the liquid-phase reflux pipeline of the pump outlet of the liquefied petroleum gas station. When the pressure inside equipment and pipelines rises over the allowed pressure, the valve will automatically open and fully discharge, and will automatically close when the pressure lowers to the setting pressure to ensure the safety of equipment. 
GAH42F Spring Loaded Full Lift Safety Valve Main Parts Material
| No | Parts Name | GAH42F- C Material | GAH42F-P Material | GAH42F --R Material |
| 1 | Body | WCB | 1cr18ni9ti | 1cr18ni12mo2ti |
| 2 | Seat | 2cr13/1cr18ni9ti | 1cr18ni9ti | 1cr18ni12mo2ti |
| 3 | Adjusting Ring | 2cr13/1cr18ni9ti | 1cr18ni9ti | 1cr18ni12mo2ti |
| 4 | Disc | 2cr13/1cr18ni9ti + PTFE | 1cr18ni9ti + PTFE | 1cr18ni12mo2ti+ PTFE |
| 5 | Guide | 2cr13/1cr18ni9ti | 1cr18ni9ti | 1cr18ni12mo2ti |
| 6 | Bonnet | zg230-450 | 230-450 | 230-450 |
| 7 | Spring | 50crva | 50crva | 50crva |
| 8 | Stem | 2cr13 | 2cr13 | 1cr18ni12mo2ti |
| 9 | Adjusting Bolt | 45 | 2cr13 | 2cr13 |
| 10 | Cap | 200-400 | 200-400 | 200-400 |