As a core technology, the main function of the fuel pump nozzle is to accurately control the fuel flow, prevent oil spills, and ensure the safety and efficiency of the refueling process. This nozzle plays a vital role every time a motor vehicle is refueled. Despite its simple appearance, the nozzle is actually a carefully designed component designed to enable safe, efficient and environmentally friendly refueling operations.

The air pump nozzle, also known as the “air nozzle”, is an integral part of the air pump handle. Its function is not only limited to fuel delivery, but also includes precise control of fuel flow, preventing oil spills, and ensuring the safety and efficiency of the refueling process.

The main components of the air pump nozzle include:

1. Nozzle: a metal tube inserted into the vehicle fuel tank;

2. Trigger: lever used to start and stop fuel flow;

3. Automatic closing mechanism: When the tank is full, the mechanism can automatically cut off the fuel flow;

4. Vapor recovery system: designed to recover fuel vapor that escapes into the atmosphere.

At the gas station, the operation of the fuel pump nozzle ensures the precise supply of fuel, avoiding waste and danger.

The flow of fuel through the nozzle of an air pump

When the refueling process starts, the air pump handle is lifted from the pump body and the nozzle is inserted into the vehicle fuel tank. The moment you pull the trigger, the fuel starts to flow. However, how is the smoothness of this process achieved?

Pump starting and flow control mechanism

When the air pump handle is squeezed, a valve in the nozzle opens to control the flow of fuel from the underground tank to the vehicle. The pressure of the pumped fuel is precisely regulated to ensure the smooth flow of fuel and avoid splashing or spillage. The trigger on the handle of the air pump allows the user to adjust the flow as needed, squeezing the trigger increases the flow, while loosening the trigger decreases the flow.

Automatic shutdown mechanism: oil spill prevention

The automatic shut-off mechanism is one of the most important safety features of the air pump nozzles and is designed to prevent fuel spilling when the tank is fully loaded. It works as follows:

Application of the Venturi effect

At the tip of the nozzle, there is a small hole connected to the inner tube of the nozzle. As the fuel flows through the nozzle, the Venturi effect creates a vacuum in the tube. When the fuel in the tank reaches the level of the nozzle tip, the hole is blocked and the vacuum is destroyed. This interruption triggered an automatic shut-off mechanism, which stopped the fuel flow immediately.

The mechanism demonstrates how air pump nozzle manufacturers can design simple and efficient solutions to prevent fuel leaks and ensure safe refueling. The automatic shut-off function is essential to prevent accidents and reduce environmental impact and is a key element in the design of gas nozzles.