Guangyi teach you the selection of mechanical seals

Guangyi teach you the selection of mechanical seals

Mechanical seals belong to one of the most sophisticated and complex mechanical basic components, which are the key components of various kinds of pump, reaction synthesis kettle, turbine compressor, submersible motor and so on.Its sealing performance and service life depend on many factors, such as type selection, precision of machine, correct installation and so on.

1. Selection method

Mechanical seal according to the working conditions and the properties of medium, there are high temperature resistant, resistant to low temperature mechanical seal, mechanical seal, high pressure resistance and corrosion resistance of granules medium mechanical seal and adapt to vaporize the mechanical seal of light hydrocarbon medium, etc., should be according to the different use to select different structure and materials of mechanical seal.

Selection of main parameters are: seal cavity pressure (MPA), fluid temperature (℃), the working speed (M/S), the characteristics of the fluid and install sealed effective space, etc.

Common sense of mechanical seals, the basic principle of selection is:

（1） According to the pressure of the sealing chamber, the sealing structure shall be determined by either balanced or unbalanced type, single end face or double end face, etc.

（2）According to the working speed, the fluid dynamic pressure type or non-contact type is determined by rotating or static type.

（3）Determine the friction pairs and auxiliary sealing materials according to the temperature and the properties of the fluid, and correctly select the mechanical seal circulation protection system such as lubrication, flushing, heat preservation and cooling.

（4）According to the effective space of the installation seal, determine the use of multi-spring or single spring or waveform spring, inside or outside.