Questions about the amount of compression of the seal


If the seal is rubber. The rubber gasket is sealed by t […]

If the seal is rubber. The rubber gasket is sealed by the elastic force of the rubber. If the compression amount is too small, the elastic force of the seal is small after compression; if the compression exceeds the limit of the rubber and loses the elastic force, it is easy to cause cracks, and the sealing effect is not affected, or the rubber pad is affected. The service life. Therefore, it is suitable to control the amount of compression of the seal to about 1/3 of the thickness of the pad.

Certainly related to the material, the hardness of different materials is different, and the amount of compression is also different.

The compression capacity of the rubber oil seal is about 12%, which is the best, and has nothing to do with the material. Because the deformation is inevitable, the correct placement method of the seal inside the warehouse is flat, but can not be hung up, because there will be deformed fluororubber heat resistance. , oil resistant, chemical resistant, aging good, suitable for high temperature (-25~240), vacuum, chemical medium, not suitable for ketone, ester using NBR rubber, oyster sauce, animal oil, ester, HFA, HFB, HFC, air and water, water resistance increases with the increase of acrylonitrile, but the low temperature and permeability are reduced. Not suitable for phosphate ester hydraulic oil and gear oil with polar additive, suitable for temperature -30~100, used for O-ring, oil seal, etc.