This seal is named because of the use of self-tensioning ring sealing ring with a notch, is a use of blocking and throttling principle of sealing device. General sealing ring are 2-4, ring installed such as a person to the sleeve of the processed ring groove, ring rely on their own elasticity and sealing the hole in the fit, in the ring on the outside of the circle to form a pre-tensioned seal.
The gas can only leak downstream through the gap between the rising ring and the annular groove. When working, the rising ring in both sides of the gas pressure difference, close to the lower end of the ring groove, into the gap of high-pressure gas to fill the gap space, so that the rising ring outer circle and the sealing seat of the inner hole between the seal is further strengthened, the rest of the leakage channel is only the rising ring of the incision. Due to the small gap between the incision, only a very small amount of gas may leak out after a few rising ring seals.
Most of the ring is made of cast iron material, high precision requirements, wear and tear can be automatically compensated for a longer service life. Because of the contact type sealing effect is more
Good, needs to be greased and lubricated when in use.