Use：

A42F type are used for the equipment and pipelines with such media as liquefied petroleum gas and similar non-corrosive at a working temperature between -29 ~ +80 ℃. AH42F type safety reflux valve is 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 closed when the pressure lowers to the setting pressure to ensure the safety of equipment.