Mechanical Seal Akman's Blog

 One purpose of the experiment 

 In general, the overhang of the shaft sleeve, the seal between the cover and the pump leaks easier to detect and resolve, subject to careful observation, especially when the work of medium or high pressure liquefied gases, toxic gases, the relative difficulty more. The rest of the leak is difficult to intuitively judge in Discrimination and shall be long-term management and maintenance practice, based on observed symptoms of the leak, analysis and research to draw the right conclusion. 

Mechanical seal the long run, the ring and static ring face wear and tear caused due to friction, springs and bushings corrosion or damage will occur, ring deformation and loss of elasticity due to aging, all of which would result in mechanical seal leakage. Therefore, after a long period after the operation, mechanical seal components for replacement or repair to, to re-use purposes.

To prevent the working fluid leaked from the pump or to prevent external impurities or air intrusion into the internal pump devices or measures as sealing, be sealed medium is generally liquid, gas or dust.

Leakage caused by two main aspects: First, seal the surface of a gap. Second, there is pressure difference on both sides of sealing parts, to eliminate or reduce any of these factors can prevent or reduce leakage to achieve the purpose of sealing. Pump design pressure and the use of pressure is an objective can not reduction, so the pump sealing the solution is to eliminate or reduce the gap between the sealing surface. This space includes the space between the sealing surface and seal the internal space Bunsen.

Mechanical seal is by a pair of or several of the vertical axis for

relative sliding face compensation mechanism in the fluid pressure

and stretch (or magnetic) to keep under seal affixed to achieve

General mechanical seal failure analysis Seal common cause, usually through the process of using the experience obtained in the past.
a. working gas sealed shock (splash and sputtering).
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Mechanical seal performance and seal life, and all parts of the material, in particular in face seal (Friction) of materials, auxiliary materials, seal and spring materials.
First, seal Friction materials
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1, the installation Precautions
1) Check carefully before installing build adequate number of sealing parts, all components for damage, especially in dynamic and static rings with or without bumps, cracks and deformation defects. If you have questions, need to repair or replace parts.
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856 # border area is a core part of the production of TDI, TDI is the largest part of production abroad, a community area, which includes light gasification, degassing, HCL resolution, compression, light gas recycling solvent removal, TDI recovery, refining and other parts . TDI production to the stability and yield 856 # border area running good or bad is the key link, and then pump in a stable production plays a crucial role, is now on the 856 # border zone pumps in the course of the following description:
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First, before the start of preparatory work and notes
1, a comprehensive inspection mechanical seals and ancillary equipment and pipeline installation is complete, compliance with technical requirements.
2, mechanical seals start before the static pressure test, check whether the mechanical seal leakage. If the leak more reason should be investigated to eliminate. If still ineffective, should be demolished and re-install checks. Hydrostatic test pressure normally used 2 to 3 kg / square centimeter.
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