There are two types of fuel tanks: open fuel tanks and closed fuel tanks. Open fuel tank, the liquid level in the tank is communicated with the atmosphere, and an air filter is installed on the fuel tank cover.
The open fuel tank has a simple structure and is easy to install and maintain. This form is generally used in hydraulic systems. The closed fuel tank is generally used for the pressure fuel tank, which is filled with a certain pressure of inert gas, and the inflation pressure can reach 0.05MPa.
If it is divided according to the shape of the fuel tank, it can also be divided into rectangular fuel tank and round tank fuel tank. The rectangular fuel tank is easy to manufacture, and it is easy to place hydraulic components on the tank, so it is widely used; the round tank-shaped fuel tank has high strength, light weight, and is easy to clean, but it is difficult to manufacture and occupies a large space, so it is often used in large-scale metallurgical equipment.