With the development of science and technology, the application field of welded bellows is expanding day by day. The main use of welded bellows is: as a control mechanism, transmitter or regulator detection elements can also be used as temperature, pressure and level measurement elements, can also be used as a variety of seals and energy transfer elements.

Welding bellows can be used not only as measuring elements, but also as sealing, connecting, compensating and isolating elements, which has a wide application prospect in many fields.

1, instrument industry

Welded bellows are mainly used as pressure measuring elements in measurement and control instruments, and can be used instead of diaphragm strings. It can also be used in the gyroscope as a volume compensation element, in the control valve as a sealing isolation element, in addition to flexible coupling, pressure switch and so on.

2. Aerospace field

Welded bellows are also used in the aerospace sector. In addition to its use in some aircraft instruments, it is also used in the automatic release pressure regulator of parachutes. In addition, it can also be used as a shaft sealing door on a rocket engine.

3, electronics industry and other industries

Welded bellows are also used in electronic devices. For example, the klystron of the satellite communication ground station uses a miniature welded bellows with an outer diameter of 10mm, an inner diameter of 5mm and a wall thickness of 0.05mm. It is used as a vacuum seal, axial connector, expansion joint, oil storage, accumulator and other aspects have also been paid attention to by various departments.

The sawtooth expander widely used in the power industry is also a typical application example of welded bellows. It actually acts as a volume compensation here. The working coils of the voltage transformer and current transformer are immersed in the insulated oil tank. With the change of the ambient temperature and working current, the temperature of the insulating oil changes widely. Therefore, in a fully enclosed system, it is necessary to compensate for the volume change caused by the thermal expansion and contraction of the insulating oil.