Double end gas film mechanical seal-

Double end gas film mechanical seal

　2018-09-15　　

Double end face gas film mechanical seal:

When there is no torch but there is a blocking gas that can provide suitable pressure, a double-end gas film mechanical seal structure is used, as shown in Figure 4-2. This structure is a sealing structure that effectively prevents the medium gas from escaping into the surrounding environment. It includes supplying blocking gas (such as nitrogen), and adding a blocking gas higher than the medium pressure through the interface 'B' between the two seals (generally, the pressure of the blocking gas is 0.2MPa higher than the medium pressure). Part of the blocked gas leaks into the atmosphere, and the other part leaks into the medium. 152 mechanical seal

This structural type of seal is equivalent to two sets of single-end mechanical seals arranged face to face. It is suitable for dangerous process gas compressors that allow a small amount of inert gas to enter the machine but do not allow process gas to enter the environment, such as process gas comparison Dirty, unstable pressure, low compressor population pressure and other working conditions.

Figure 4~2 Double end face seal structure

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Single end face gas film mechanical seal 　 　 series gas film mechanical seal