Pusher Seals
Pusher mechanical seals are one of the primary types of seals in the marketplace today. They can be found in virtually every piece of industrial OEM rotating equipment moving liquids or gas: including pumps, mixers, and compressors.
A pusher seal has a set of faces that form the primary seal (two components in which one face rotates against a stationary face). Then it has secondary seals (O-rings, U-cups, wedges), typically composed of elastomeric compounds or PTFE. These form static seals to the equipment while one acts as a dynamic (sliding) seal allowing the seal to move with the equipment to accommodate for wear, tear, and vibration.