Why is there always a gap in the tank after the oil is added to the tank?
In accordance with the pressure capacity of the container and the actual temperature changes, as well as the type of oil installed, generally set aside the spare amount
There is a certain gap, because the gas is easy to compress, so it does not cause too much pressure (but the pressure will increase). Relatively safe.
When the oil is filled, the oil will expand at high temperature, and the high pressure formed may burst the container, leading to oil leakage and disaster. Similarly, shrinkage can cause deformation, but this effect is generally less.
