In this video we present the difference in behaviour of a semi-compact seal and a U-cup seal under different operating pressures. You will see how the semi-compact seal performs well in all situations, definitely better than the U-cup seal.
SD is a semi-compact seal for rod with double lip made by Aston Seals.
Wear and dry run are largely prevented by additional lubricant retained within the gap created by the secondary lip. In some cases this second sealing lip may even act as a substitute for a costly tandem sealing system when complete sealing under certain working conditions can only be achieved by two seals placed one behind the other in separate housing.
It’s designed to be less sensitive to pressure fluctuations than typical “U” seals.
The material used to produce this seal is a polyurethane compound that ensures excellent properties on wear-resistance, extended service life and resistance against extrusion.
