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What are the tips for selecting mechanical seals?
Mar 12, 2018

Mechanical seals belong to the precision, the structure of more complex mechanical base components, is a variety of pumps, reaction reactor, turbine compressors, submersible motors and other equipment key components.

Its sealing performance and service life depends on a number of factors, such as selection, machine accuracy, correct installation and use.

Mechanical Seals Selection Method:

Mechanical seals According to the working conditions and the nature of the media are different, there are high temperature, low-temperature mechanical seals, high pressure, corrosion-resistant mechanical seals, mechanical seals resistant to granular media and suitable for easy vaporization of light hydrocarbon medium mechanical seals, should be based on different uses of different structural types and materials of mechanical seals.

The main parameters of the selection are: Sealed chamber pressure (MPa), fluid temperature (℃), working speed (M/s), fluid characteristics and effective space for installation of seals.

The basic principles for the selection of mechanical seals are:

1. According to the sealing chamber pressure, the seal structure is determined to adopt balanced or unbalanced type, single end face or double end face.

2. According to the working speed, determine the use of rotary or static, fluid dynamic pressure or non-contact type.

3. According to the temperature and fluid properties, the determination of friction pairs and auxiliary sealing materials, as well as the correct selection of lubrication, flushing, insulation, cooling and other mechanical seal cycle protection system. 4. According to the effective space of the installation seal, the use of multiple springs or single spring or wave spring, internal or external loading.


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