sell manhole cover

Description

Manhole cover is installed on the top of the tank to prevent the fuel leakage when tank is over rolled, built in P/V vent to adjust the pressure, when there is pressure difference between inside and outside the tank.It will automatically inlet or echaust air when there is accident or under high temperature, it will adjust pressure so that it can ensure the safety and environmental protection. It has second class open design, when open the up binder plate, it will release the pressure out to prevent the worker from the pushing over; in the main plater of the manhole, there are two blingding holese can be installed with optic senor, dip thbe or ternal vacuum valve according to the user\'s demands; hooped connecting way, which instead of flanged connecting to make the installation more convenient and reliable. It is suitable to transport petroleum, diesel, diesel, kerosene and the other light oil and so on.