One, can be classified by sealing medium: gas seal with oil seal, fluid seal with oil seal, grease seal with oil seal;

 

Two, according to the sealing shape classification: rotating shaft (inner seal), rotating shell with oil seal (outer seal);

 

Three, can be classified according to its own structure: skeleton oil seal (mainly including exposed frame oil seal and inner skeleton oil seal), skeleton oil seal, compound oil seal;

 

Four, according to the classification of spring oil seal or no spring: spring type (ribbon spring or finger spring oil seal), no spring oil seal;

 

Five, according to the number of lip oil seal classification: single lip oil seal, lip oil seal (dust-proof lip oil seal or separate two kinds of lip oil seal, etc.);

 

Six, according to the rotating line speed classification: low speed (standard low line speed <8m/s), medium speed oil seal (standard line speed 8-17m/s), high speed oil seal (standard line speed >17m/s);

 

Seven, can be classified according to whether there is hydrodynamic oil return effect: ordinary smooth oil seal, lip with oil return line oil seal;

 

Eight, according to the oil seal medium pressure classification: low pressure oil seal, high pressure oil seal;