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What Steps Are Required For The Mechanical Seal Selection Method?
May 11, 2018

What steps are required for the mechanical seal selection method?

Mechanical seals vary in terms of working conditions and media properties, including high temperature resistant mechanical seals, low temperature resistant mechanical seals, high pressure and corrosion resistant mechanical seals, mechanical seals resistant to particulate media, and mechanical seals suitable for easily vaporized light hydrocarbon media. The mechanical seals of different structural types and materials should be selected according to different uses.

The main parameters of the selection are: seal chamber pressure (MPa), fluid temperature (°C), working speed (m/s), characteristics of the fluid, and effective space for mounting and sealing.

The basic principles of selection are:

1. According to the pressure of the sealed cavity, it is determined that the seal structure is balanced or unbalanced, and the mechanical seal of the pump is single-end or double-end;

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, determine the friction pair and auxiliary sealing material, as well as the correct choice of lubrication, flushing, insulation, cooling and other mechanical seal protection system;

4. According to the effective space of the installation seal, determine the use of multi-spring or single spring or wave spring, built-in or exterior type.

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