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Mechanical seal selection knowledge

Update:16 Aug 2017
Summary:

   Mechanical seals are classified as one of the most s […]

   Mechanical seals are classified as one of the most sophisticated mechanical foundation components of precision and structure. They are the key components of various pumps, reaction components, turbine turbines, submersible motors and other equipment. Its sealing function and service life depends on many elements, such as selection, the accuracy of the machine, the use of accurate devices.
   Selection method
   Mechanical seal according to operating conditions and dielectric kettle with mechanical seal quality is not the same, there are high temperature, low temperature mechanical seal, high pressure, corrosion resistance mechanical seal, resistant to granular media mechanical seal and custom easy to vaporize the light hydrocarbon medium machinery Sealing, etc., should be based on different usage to choose not the same type of construction and mechanical seal.
   The main parameters of the selection are: sealed chamber pressure (MPA), fluid temperature (℃), operating speed (M / S), the characteristics of the fluid and the device sealed and other useful space.
   The basic principles of selection are:
   1. According to the sealing chamber pressure, determine the seal structure selection of balanced or non-balanced type, single-ended or double-ended and so on.
   2. According to the operating speed, determine the choice of rotary or stop, fluid dynamic or non-touch type.
   3. According to the temperature and fluid properties, determine the conflict and auxiliary sealing information, and the accurate selection of smooth, scouring, insulation, cooling and other mechanical seal cycle maintenance system.
   4. According to the device sealed the useful space, determine the choice of multi-tensioned spring or single tension spring or wave tension spring, built-in or exterior type.

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