China Sealcon Company

Selection Methods and Basic Principles of Mechanical Seal

Mechanical seals are one of the precise and complicated mechanical elements, which are the key parts of various pumps. For the pump, more than 50% of the leakage problem is often caused by mechanical seal!

According to different working conditions and media properties, there are mechanical seals with high temperature resistance and low temperature resistance, with high pressure resistance and corrosion resistance, and mechanical seals resistant to particle media and suitable for light hydrocarbon medium which is easy to vaporize. Mechanical seals of different types of construction and materials shall be selected for different purposes. Selection of main parameters are: seal cavity pressure (MPa), fluid temperature (℃), the working speed (m/s), the characteristics of the fluid and install sealed effective space, etc.

Basic principles of type selection

1. According to the pressure of the sealed cavity, determine whether the sealing structure is balanced or non-balanced, single end face or double end face, etc.

2. According to the working speed, determine the use of rotary or static, fluid dynamic pressure type or non-contact type.

3. According to the temperature and fluid properties, determine the friction pair and auxiliary sealing materials, and correctly choose lubrication, washing, heat preservation, cooling and other mechanical seal cycle protection system.

4. According to the effective space of sealing installation, multiple or single spring or corrugated spring, internal or external type is adopted.
Related News
  • Sealing Sense

    Sealing Sense

    November 29, 2017Thermal growth rate differences of head flanges, tube-sheets, bolts and gaskets create an upset of the gasket-flange interface and a loss of seating stress on the gasket that can cause flanges to leak...view
  • Classification Of Rubber Seal Ring

    Classification Of Rubber Seal Ring

    May 4, 2018There are all kinds of rubber seal rings in rubber seal factory. According to the ssutting shape, it can be divided as follows:O seal ring series (DSH seal series)It has many kinds of products, such a...view
  • Leakage Analysis And Maintenance Of Mechanical Seal

    Leakage Analysis And Maintenance Of Mechanical Seal

    May 4, 2018Leakage analysis and maintenance of mechanical seal1. Repair of mechanical sealMechanical seal flygt pump do not need special tools and materials for maintenance. Generally speaking, mechanical seals ...view
  • Common Problems In Mechanical Seal Pump

    Common Problems In Mechanical Seal Pump

    May 4, 2018The following are several common failure about the seal of mechanical seal flygt pump:(1). Leakage during installation of static test. After the mechanical seal is installed and debugged, the static p...view
  • The Mechanical Seal Of The Pump

    The Mechanical Seal Of The Pump

    May 4, 2018The mechanical seal of the pump is the material or part that prevents the leakage of fluid or solid particles from the adjacent surface and prevents the external impurities, such as dust and water, in...view
  • Sealing Technology

    Sealing Technology

    May 4, 2018Sealing technology mainly refers to the use of a certain combination of sealing materials, sealing elements and the corresponding seal structure form, to prevent or cut off the mass transfer process b...view