english 
Gasoline transfer tanks are vital in the process of gasoline storage and transportation. Their operation is based on several key principles.
Intake Process
When gasoline needs to be filled into the transfer tank, a pumping system is usually employed. A fuel pump, powered by electricity or an engine, creates a pressure differential. This pressure difference forces gasoline from a source, such as a refinery storage tank or a large - scale fuel depot, through the inlet pipe and into the transfer tank. The diameter and length of the inlet pipe, along with the pump's power, determine the filling rate. During this process, the breather valve plays an important role. As gasoline enters the tank, air inside the tank needs to be displaced. The breather valve allows the air to escape, maintaining a normal pressure inside the tank. This ensures that the filling process can proceed smoothly without creating excessive pressure build - up.
Discharge Process
For discharging gasoline, the transfer tank is connected to the destination, like a gasoline dispenser at a gas station or a fuel - consuming machine in an industrial setting. A pump at the transfer tank or at the receiving end creates suction or pressure. If there is a pump at the transfer tank, it pushes the gasoline through the outlet pipe towards the destination. If the receiving - end has a pump, it creates a low - pressure area, drawing the gasoline out of the transfer tank. The level gauge continuously monitors the gasoline level in the tank. When the level gets too low, it can trigger an alarm or prompt the need for refilling.
Pressure Regulation
The breather valve is essential for maintaining the correct internal pressure of the transfer tank. As the temperature changes, gasoline expands or contracts. If the tank is a sealed system without a breather valve, this expansion could cause excessive pressure build - up, potentially leading to tank rupture. Conversely, contraction could create a vacuum, making it difficult to discharge gasoline. The breather valve automatically opens when the internal pressure is higher than the external pressure (e.g., during filling or when the temperature rises), releasing excess pressure. When the internal pressure is lower (e.g., during discharge or when the temperature drops), it allows air to enter, thus keeping the tank's pressure within a safe and operable range.