MECHANICAL SEAL
GAS LUBRICATED SEAL

Elaborate buffer fluid oil systems for the lubrication and cooling of double seals are superfluous. Gas pressurization at a level of around 5 to 10% above product pressure (p1) makes sure that no process medium can escape to the atmosphere. A small gap height of approximately 3 µm between the sliding faces results in minimum consumption of buffer gas of a magnitude that depends largely on the pressure, speed and seal diameter.

V-grooves : The V-grooves convey the gas bt a rotary movement between the sliding faces. The resulting pressure rise causes the seal faces to lift off and ensures a contact-free operation. V-grooves are dependent on the direction of rotation.

U-grooves : For sliding faces featuring U-grooves, the operating principle is similar to that for V-grooves, with one decisive difference: the direction of rotation is independent.