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2. Hydraulic seal - Wikipedia

   en.wikipedia.org/wiki/Hydraulic_seal

   Hydraulic Piston seals prevent fluid from crossing the area of the piston head. Rod seals ensure that fluid does not leak from the cylinder and adequate pressure is maintained. Wiper seals are installed to prevent contamination from entering the hydraulic system. [2] A rod seal prevents leakage of hydraulic fluid to the outside of the sealing ...

3. Hydraulic cylinder - Wikipedia

   en.wikipedia.org/wiki/Hydraulic_cylinder

   A hydraulic cylinder is the actuator or "motor" side of this system. The "generator" side of the hydraulic system is the hydraulic pump which delivers a fixed or regulated flow of oil to the hydraulic cylinder, to move the piston. There are three types of pump widely used: hydraulic hand pump, hydraulic air pump, and hydraulic electric pump.

4. Rotary union - Wikipedia

   en.wikipedia.org/wiki/Rotary_union

   Other designs include an elbow port, which causes the material to flow out at an angle, and multiple ports. A multiple port rotary union looks like a perforated cylinder. At the end of the cylinder is a threaded screw with a seal or seals that lock on to it. The material being transferred flows into the cylinder and out of the input holes.

5. O-ring - Wikipedia

   en.wikipedia.org/wiki/O-ring

   Installation damage – This is caused by improper installation of the O-ring. Spiral failure – Found on long-stroke piston seals and – to a lesser degree – on rod seals. The seal gets "hung up" at one point on its diameter (against the cylinder wall) and slides and rolls at the same time.

6. Hydraulic machinery - Wikipedia

   en.wikipedia.org/wiki/Hydraulic_machinery

   Hydraulic cylinders; For the hydraulic fluid to do work, it must flow to the actuator and/or motors, then return to a reservoir. The fluid is then filtered and re-pumped. The path taken by hydraulic fluid is called a hydraulic circuit of which there are several types. Open center circuits use pumps that supply a continuous flow.

7. Wiper seal - Wikipedia

   en.wikipedia.org/wiki/Wiper_seal

   Wiper seals are often used for fluid containment and to prevent dirt from entering a reciprocating shaft mechanism. [1] Wiper seals are typically used on hydraulic and pneumatic cylinders, as well as telescopic suspension forks for motorcycles and bicycles.