V reciprocating motion with a rubber seal. Section V, called V rubber seals. Is commonly used by a fabric fabric of pressure ring, support ring, and combinations of a v-shaped sealing ring, sealing ring number depends on the size of sealing pressure.

　　V-shaped sealing ring composed of tape or pure rubber moulded, generally use NBR rubber, pressure ring and a ring with a hard commonly tape pressing, support ring can also be hard plastic. V seal assembly is mainly used for the piston rod of heavy equipment, column. The seal assembly can provide very good stability and good wear resistance, and can prevent the sealing ring is in clearance, even in harsh conditions, such as axial or radial vibration, sudden changes in pressure, temperature and so on can still provide the best sealing effect.

　　Applied to the hydraulic oil, water and emulsion dielectric, working pressure can reach more than 40 MPa and surface linear velocity of 0.5 m · s - 1, using temperature was minus 30 ~ 120 ℃.