Rubber, PTFE, Metal, Bonded and Inflatable In a static sealing applications there is no movement between sealing surfaces or between the seal surface and its mating surface. The most common seal used in static sealing situations is the O-Ring, but in addition to these, Yimai Sealing Solutions offers a range of specialized static seals. The range includes our proprietary metal O-Rings, , which are ideal for use in extreme temperatures and pressures. Other static seals we offer include inflatable seals, various rubber seals, valve seals, x-rings, square rings, rubber - metal bonded seals, polyurethane seals and spring energized Polytetrafluoroethylene (PTFE) seals. Resistant to virtually all media, static seals in our PTFE based material are offered for contact with aggressive chemicals. In addition, there is the inflatable suitable for sealing doors and openings especially in chemical or semiconductor applications. Static seals are used in hydraulic applications where two mating surfaces or edges require positive sealing. A static seal, by definition, is one that remains stationary and subjected to no movement and its related friction. A static seal may be exposed to hydraulic pressure on both sides or be exposed to hydraulic pressure on one end and air on the other. Most often in hydraulics, static seals are used to seal a body, flange or head to another stationary tube, cap or other components. One example is the rear cover of a piston pump that must seal against the pump housing and does so with a gasket or O-Ring. The seal must only contain low-pressure case oil and prevent it from leaking unintentionally from the pump.