What are the selection methods of mechanical seals?1

What are the selection methods of mechanical seals?

Depending on the working conditions and the properties of the medium, mechanical seals include high temperature and low temperature resistant mechanical seals, high pressure and corrosion resistant mechanical seals, particle medium-resistant mechanical seals, and mechanical seals adapted to light hydrocarbon media that are easily vaporized by mechanical seals, etc. Mechanical seals with different mechanical seal structure types and materials should be selected according to different uses. The main parameters of the selection are: sealing cavity pressure (MPa), fluid temperature (°C), working speed (m/s), fluid characteristics and effective space for sealing installation. The basic principles of selection are as follows: 1. According to the pressure of the sealing cavity, determine whether the sealing structure adopts the mechanical shaft seal balanced type or unbalanced type, single end face or double end face, etc. 2. According to the working speed, determine whether to use rotary or static, hydrodynamic or non-contact. 3. According to the temperature and fluid properties, determine the friction pair and auxiliary sealing materials, and correctly select the mechanical seal circulation protection system such as lubrication, flushing, heat preservation, cooling, etc. 4. According to the effective space of the installation seal, determine the use of multiple springs or single springs or wave springs, built-in or external