Metal bellows mechanical seals have a wide range of applications, ranging from low to high temperatures, from neutral to corrosive media, from low to high speeds, and from ordinary to harsh working conditions. Corrugated pipes include rubber corrugated pipes and serpentine sleeves, plastic corrugated pipes, and metal corrugated pipes. Rubber corrugated pipes and serpentine sleeves are used as auxiliary seals for low load mechanical seals; Plastic corrugated pipes are used as auxiliary seals for mechanical seals in highly corrosive media; Metal corrugated pipes are used as mechanical seals for high-temperature, high-pressure, and low-temperature media, both as auxiliary seals and as elastic components.

Metal corrugated pipes should have high elasticity, strength, and stiffness. It can be used in situations where the pressure reaches 7Mpa, suitable for high and low temperature operations, with a temperature resistance of -240 ℃ to+650 ℃, and a film thickness not greater than (<0.4mm), which determines the requirement for corrugated pipe materials to have high corrosion resistance and be used in neutral media.

Due to the difficulty in maintaining absolute parallelism of the contact surfaces in metal bellows mechanical seals, the internal movement of the mechanical seal itself is also normal. This movement is usually caused by equipment and installation tolerances, thermal expansion, pipeline stress, or improper spindle adjustment. In order to always maintain the mutual fit of the sealing surfaces, the spring plays a constant adjustment role between the mechanical seal and the movable spindle. When using an elastomer seal between the rotating surface and the spindle, the elastomer will move back and forth on the spindle. This repeated friction will wear out the anti-corrosion material on the spindle, lose the protective coating of the oxide film on the spindle, and ultimately form wear grooves on the friction surface of the spindle, leading to liquid leakage from the spindle. And increased the necessary maintenance workload. Even replace the spindle. To solve this problem, replaceable sleeves are usually installed in the stuffing box. However, the solution to corrosion and wear issues is to remove the dynamic seal inside. Nowadays, most major seal manufacturers produce non corrosive wear seals to prevent corrosive wear on pump parts. The balance of balanced and unbalanced mechanical seals has a significant impact on the sealing pressure of the contact surface. The sealing pressure depends on the effective cross-sectional area of the seal itself and the pressure inside the stuffing box. The cross-section on the other side of the rotating surface of the unbalanced seal is exposed within the pressure range of the stuffing box. This situation will generate higher sealing pressure between the sealing surfaces, thereby increasing the working temperature and accelerating the wear rate. Under high-temperature working conditions or when the liquid has strong corrosiveness and corrosiveness, the service life of mechanical seals will be greatly shortened. Balanced mechanical seals can reduce sealing pressure and extend sealing life.