Mechanical seal is one of the precision and complex mechanical basic elements, and it is the key component of various pumps, reaction synthesis kettles, turbine compressors, submersible motors and other Grundfos equipment. Its sealing performance and service life depend on many factors, such as model selection, machine accuracy, correct installation and use, etc. How to select the model?

According to different working conditions and medium properties, mechanical seals include Grundfos pump mechanical seals that are resistant to high temperature and low temperature, high pressure and corrosion, granular media and light hydrocarbon media that are easy to vaporize. The main parameters of the selected Glandfos pump seals include: seal chamber pressure (MPa), fluid temperature (℃), working speed (m/s) Fluid characteristics and effective space for installing seals.

The basic principles of model selection are:

1. According to the pressure of the sealing chamber, it is determined that the sealing structure is balanced or unbalanced, single end or double end;

2. Rotary or static, hydrodynamic or non-contact type shall be adopted according to the working speed;

3. According to the temperature and fluid properties, determine the friction pairs and auxiliary sealing materials, and correctly select the lubrication, flushing, thermal insulation, cooling and other mechanical seal circulation protection systems;

4. According to the effective space of the installation seal, it is determined to use multiple springs or single springs or wave springs, internal or external.