bälgpump

A bälgpump, also known as a bälg pump or bälg system, is a type of positive displacement pump used primarily in the automotive industry for fuel transfer. It was developed by the German company Bälz AG and is named after the company's founder, Karl Bälz. The pump consists of an elastomer (bälg) diaphragm that moves in a cylindrical housing, creating a vacuum and drawing fuel into the pump. When the diaphragm moves back, it forces the fuel out of the pump.

The bälgpump is known for its reliability and durability, making it a popular choice for fuel transfer in various applications, including cars, trucks, and buses. It is particularly favored for its ability to handle fuels with a wide range of viscosities and its resistance to contamination. The pump operates silently and without the need for lubrication, further enhancing its reliability.

One of the key advantages of the bälgpump is its ability to operate at high pressures, making it suitable for high-performance vehicles. However, it is also used in standard vehicles due to its simplicity and robustness. The pump is typically controlled by a fuel pump relay, which activates the pump when the engine is running.

The bälgpump is a critical component in the fuel system of many vehicles, ensuring a steady and reliable supply of fuel to the engine. Its design and performance characteristics have contributed to its widespread use in the automotive industry.