Vent valve

installed on the top of the Tanker to ensure the safety when transportation. High sensitively ,when there is pressure differences inside and outside the tanker ,it will automatically inlet or exhaust air to adjust the pressure it is suitable for diesel,gasoline and kerosene and other light fuel. To the different installment mode ,there are internal P/V vent and external  

1.Vent valve for manhole covers.

2.Keep the internal pressure.