SAP parts mechanical face seals are also called as heavy duty seals floating seals, or do a cone seals. The construction of metal face seals. These seals are comprised of two identical metal friction rings, which are necessarily hardened and polished metal surfaces with a mirror finish, along with the two rubber rings placed on metal parts exerts, a uniform axial pressure amidst the housing and the seal, one of the metal rings remains static while the other keeps rotating, this provides a ceiling effect through friction between the two components.