GAHN42F LPG BACK FLOW SAFETY VALVE
GAH42Fsafety valve are mounted on the liquid-phase backflow pipeline of the pump outlet of the liquefied petroleum gas station. When the pressure before the pump exceeds the stated value, the valve will open automatically and lead to safe return of the liquid so as to ensure the safe operation of equipment and pipelines. 
GAA42H / Y Spring Loaded Full Lift Safety Valve Main Parts Material
| No | Parts Name | GAA42H-C/ GAA42Y- C Material | GAA41Y--P/ GAA42Y-P Material | GAA41Y--R / GAA42Y-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 |
| Sealing | D507 | Stellite 6 | ||