Filled polytetrafluoroethylene composites are used more and more widely in hydraulic and pneumatic seals. They can be used alone to make hydraulic cylinders, cylinder guide support rings, dynamic and static seal rings and gaskets; PTFE composites can pass Secondary machining to produce PTFE composite guide tape.

It solves the processing problem of the large-diameter hydraulic cylinder and the guide ring of the cylinder. It can be applied to large cylinders with a diameter of more than 1 meter, which greatly reduces the manufacturing cost of such seals, especially the PTFE bronze composite guide belt. Has been widely used in the hydraulic and pneumatic sealing industry.

The U-ring seal U-ring seal has better sealing performance, but it is easy to roll when used alone. Therefore, it needs to be used together with the tin bronze support ring. The friction resistance is large and increases with the increase of working pressure. Therefore, the U-ring is only suitable for hydraulic cylinders with low working pressure or low moving speed.

Y-ring seal Y-shaped seal ring is sealed by its open lip close to the sealing surface, usually can be used alone, its sealing performance is better, friction resistance is small, pressure resistance performance is good, work stability Good, long life. Therefore, the Y-shaped seal ring is suitable for high-speed variable pressure, large bore diameter, large stroke hydraulic cylinders.