Bellows for sensorsThe manufacturer believes that because the wall thickness and other geometric dimensions of the welded bellows are easy to control during the manufacturing process, its working characteristics are better. For example, the non-linearity of the welded bellows used as a measuring element in the United States is less than 0.4%, the hysteresis is less than 0.25%, and the stiffness dispersion is less than 1/-10%. In addition, the ratio of the outer diameter to the inner diameter of the welded bellows can be selected to be larger, ranging from 1.2 to 3. This means that the sensitivity of the bellows can be improved. However, for the hydroformed bellows, the ratio of the outer diameter to the inner diameter is limited by the plasticity of the material and cannot be selected too large, generally around 1.2 to 1.8. Therefore, the welded bellows is an ideal sensitive element.

Bellows manufacturers for sensors believe that the compression displacement of hydroformed bellows is generally 50% of its free length, and the better working displacement is about 10% ~ 20%, while the welded bellows can reach 80% compression. Therefore, it is suitable for occasions with small structural space and large workload. Due to the large displacement, the capacity compensation capacity is also large. Other forms of bellows do not achieve such a high index.

Sensor bellows manufacturers believe that the service life of welded bellows has different requirements for different users. Welded bellows as a pressure detection element, the general service life can reach about one million times. However, under harsh working conditions, such as corrosive media, or under high pressure and high temperature, the service life is about 100000 times. In some special occasions, such as rocket engine rotor shaft seal with welded bellows, when the speed is 3000r/min, the service life is calculated by time.

　　Bellows for sensorsManufacturers believe that ordinary welded bellows do not withstand high pressure. In order to improve its pressure resistance, in recent years, there has been a double-layer structure of welded bellows, pressure capacity of 14 ~ 70MPa. This welded bellows has a strong ability to withstand internal and external pressure. In the case of internal pressure, it is necessary to drill 2 to 4 vent holes evenly on the outer diaphragm of the double-layer diaphragm, and the aperture is generally less than 5mm, so that the double-layer diaphragm can be closely fitted when compressed, thereby improving the pressure resistance.

Bellows for sensors: Because the material is different from hydroforming when manufacturing welded bellows, it has to undergo great deformation and stretching, so this process is especially suitable for materials with poor plasticity and good elasticity. This opens the way for the development of corrugated pipes made of special materials such as high temperature resistance, corrosion resistance and high strength. Commonly used materials are austenitic stainless steel, martensitic stainless steel, nickel-based alloys and titanium alloys.

Bellows for sensors manufacturers believe that welded bellows have the characteristics of high precision, small rigidity, large displacement, and long service life. Therefore, it can be used not only as a measuring element, but also as a sealing, connection, compensation and isolation element. Has broad application prospects.

　　Bellows for sensorsThe manufacturer believes that the welded bellows is mainly used as a pressure measuring element in the measurement and control instrument and can be used instead of the bellows string. It can also be used as a volume compensation element in a gyroscope, a sealed isolation element in a regulating valve, a flexible coupling, a pressure switch, etc.