Bellows mechanical seals have a wide range of applications, from low temperature to high temperature, from neutral media to corrosive media, from low speed to high speed, and from ordinary to harsh working conditions.
Bellows include rubber bellows and serpentine sleeves, plastic bellows and metal bellows. Rubber bellows and serpentine sleeves are used for low-load mechanical seals as auxiliary seals; plastic bellows are used for mechanical seals in strong corrosive media as auxiliary seals; metal bellows are used for mechanical seals of high temperature, high pressure and low temperature media, which can be used as auxiliary seals. Can be used as elastic element. The welded metal bellows mechanical seal has good floatability and random compensation, which can compensate for the leakage of the seal ring due to wear, axial movement and vibration. The welded metal bellows itself acts as both an elastic element and a seal. There is no auxiliary sealing ring in the middle of the metal bellows mechanical seal, which reduces a leakage point; at the same time, the frictional resistance of the compensation mechanism is reduced; in the petrochemical industry, welded bellows The use temperature of the seal is not limited by the auxiliary seal ring; for the PTFE bellows seal, it can be used in corrosive media. The disadvantage is that some bellows have less elastic force and need to add auxiliary springs. Welded metal bellows is made of staggered and tightly welded inner and outer diameters of each wave plate, so there is no need to consider the direction of rotation when it is used as a static or rotary type. Welded metal bellows can be made of precipitation hardened stainless steel, high-temperature nickel-based materials and chromium-nickel corrosion-resistant materials, so welded metal bellows can be used in a wide range of temperature (-11℃-426℃), and various Acid, alkali, salt medium. Choose different thicknesses and layers of the wave plate so that it can withstand a pressure of up to about 7MPa in the pump. The design of the welded metal bellows mechanical seal is generally balanced, so its bearing pressure has little effect on the specific pressure of the end face. The welded metal bellows mechanical seal is not only suitable for non-hydrocarbon media, but also for flashing hydrocarbon media. Compared with ordinary mechanical seals, its service life has also been greatly improved, so the bellows mechanical seal has a high performance-price ratio.
Metal bellows mechanical seal features:
Bellows is a sealing element that integrates elastic elements, auxiliary seals and torque transmission mechanisms (ordinary seals do not have this kinetic energy), and the torque mode is unique to bellows mechanical seals. The specific pressure of the end face is uniform, and it has the characteristics of high temperature resistance and good followability. The moving ring has no auxiliary sealing ring, thus reducing a leakage point and reducing the frictional resistance of the moving ring. Commonly used bellows are pressed and welded. Pressed bellows are made by thin-walled tube stretching and forming on a press or by hydraulic pressure molding; welded bellows are made by welding the inner and outer circles of film sheets.
Akman Seals is a supplier of bellows mechanical seals, the quality of our bellows mechanical seals is guaranteed. If you are interested in bellows mechanical seals, you can pay attention to our website.
