Engineering mechanical seal selection

Mechanical seal according to the working conditions and the different nature of the media, with high temperature, low temperature mechanical seals, high pressure, corrosion-resistant mechanical seals, mechanical security seals and resistance to particulate media to adapt easily vaporized light hydrocarbon medium, mechanical seals, etc., should be based on different usefulness select a different structural types and materials of the mechanical seal.
Selection of the main parameters are: seal chamber pressure (MPA), fluid temperature (℃), working speed (M / S), fluid properties and the effective seal installation space.
Selection of the basic principles are:
1, according to the seal chamber pressure to determine the sealing structure using balanced or unbalanced, single face or double, etc.;
2, according to the working speed, determine the use of rotary or static, hydrodynamic or non-contact type;
3, according to the temperature and fluid properties, determine the friction and auxiliary sealing materials, as well as the right choice lubrication, washing, heat, cooling, mechanical wire seal loop protection system;
4, according to the sealed space efficient installation, determine the use of multi-or single spring or springs wave springs, built-in or externally mounted.