News - A gasket structure

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Home > News > A gasket structure

A gasket structure - 2013-07-26 01:03:03

Gasket in the upper and lower flange gasket placed between the bolt and tighten the flange gasket will compress. When Walter media, there are two ways of leakage:
First, through an internal gasket leak;
Second, through the gasket leak between the two flanges.
The former is called penetration leakage, which is known as the interface drain port when using loose material having pores do gaskets, prone to infiltration leakage. Leakage and medium properties relevant. Meanwhile, the medium is air, the pressure rose. .588 MPa which produce leakage; medium is water, the pressure rose to 2. 94MPa, still can not see water droplets. Obviously, a small molecular diameter gaseous substances, viscosity, easy leakage not easily found. To overcome leakage, often leaky filler material added to fill the void. However, high pressure, the gasket inside the pores will expand; effect of high temperature causes the filler aging, failure, medium viscosity reduction will accelerate the leakage mouth Therefore, in the high-temperature, high-pressure and low-viscosity sealing medium, requires the use of non-permeable materials such as metal gasket.
In the chemical industry, the interface leaks are primarily due to seal failure, it is the choice of the flange sealing surface, machining accuracy, the gasket dimensions and material properties, fastening methods, and other factors are closely related to the degree of compression. Therefore, the solution interface is more difficult to leak. To prevent leakage of the interface, you must try to reduce the leakage channel leakage channels and increasing the resistance, and make greater pressure on both sides of the sealing surface leakage arising impetus. Admittedly, there is no absolutely no leakage at any sealing the mouth there is a leak at all, but leakage is different. If leakage is minimal, as well as people feel, the instrument will not be displayed or below a permissible value, then that seals intact. This allows the value of the toxicity of the medium, radioactive, explosive degree. Dangers of the medium, which allows leakage value is very small, generally medium is slightly larger.

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