Bellows Mechanical Seal

The outer seal has the following five major benefits:


1.Easy installation;


2.The cost is relatively low;


3.Can be continuously monitored and cleaned;


4.Suitable for small stuffing boxes that cannot be sealed inside;


5. Because its position is close to the bearing, it has less influence on the difficulty of spindle deviation. Its main disadvantage is that the centrifugal force will throw solid particles from below the seal to the contact surface of the seal. Therefore, this type of seal is mainly suitable for liquids that are clean and free of abrasives. In recent years, separate seals have become another important additional feature in outer seals. The separable seal is a complete set installed between the stuffing box and the bearing sleeve. With this design, when the seal needs to be replaced, the liquid pump does not need to be disassembled every time. This type of seal is being developed in conjunction with exploring other design standards. Because this design is easy to replace the seal, it is important to resist the temptation to replace only the seal without further investigating the cause of the failure. Cartridge seal The cartridge seal is a kind of all-in-one sealing device, which includes all sealing elements, glands and shaft sleeves inside. Since this type of seal does not require any strict installation measures, the installation procedure is greatly simplified, and the sealing surface and sealing elastomer are well protected to prevent accidental damage. These advantages also mean reduced seal repair and replacement time.

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