This packing floats in the housing and doesn’t need any initial compression to operate. The sets consist of a female, intermediate rings, and a male molded from all rubber, which is the main sealing element. The packing design uses the hydraulic pressure of the equipment to set the compression on the seals for sealing. This packing is rated to 5000 psi + and can be supplied from different compounds in split or endless forms. Once installed, it is maintenance-free.