The sealing ring, also known as copper gasket, is a ring seal with a notch, placed in the ring groove of the sleeve, the sleeve and the shaft together with the rotation, the sealing ring by the elasticity of the notch is pressed together against the wall of the inner hole of the stationary parts can play a sealing role. Each contact surface should be hardened and polished. Seal ring with chromium wear-resistant cast iron manufacturing, can be used for sliding speed of less than 100m / s; if the sliding speed of 60 ~ 80m / s range, you can also use tin bronze manufacturing seal ring.

Seal ring is in the impeller inlet at the pump casing mounted on a metal ring (also known as the mouth ring), its role is to prevent abrasion between the impeller and the pump casing, the form of flat straight, face sealing type. The advantage of the end seal type is the leakage back to the water along the radial outflow, and straight along the axial outflow compared to improve the pump inlet at the state of the water flow, improve the efficiency of the pump.