Brief Discussion on the Three Key Points of Selection of Mechanical Seals

Mechanical seals are one of the most sophisticated and complex mechanical basic components. They are key components of various types of pumps, reaction synthesis vessels, turbo compressors, and submersible motors. Its sealing performance and service life depend on many factors such as type selection, machine accuracy, proper installation and use. Today Xiao Bian talked about the selection of mechanical seals.

First, the four basic principles of selection

1: According to the pressure of the sealed chamber, it is determined that the sealing structure is balanced or unbalanced, 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, washing, insulation, cooling and other mechanical seal protection system.

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

Second, the basic method of selection

According to different working conditions and medium properties, mechanical seals are resistant to high temperature and low temperature 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 use of mechanical seals of different structural types and materials.

Third, the main parameters of the selection are: sealed chamber pressure (MPA), fluid temperature (°C), working speed (M/S), characteristics of the fluid, and effective space for installation and sealing.