The elements of hydraulic systems work together as one, converting the attempted compression of liquids into high-torque kinetic energy. If a single element in the chain of components fails, the whole system suffers a loss of efficiency or can fail completely. These elements include one that is usually overlooked: the hydraulic seal.
Seals come in many varieties, but in hydraulic systems, they tend to be grouped into one of two “families”: static (or immobile) seals, or dynamic (flexible) seals. Static seals are used to protect connections between fixed components, such as an O-ring between a cover and the compartment it protects. Dynamic seals have a harder job—they are intended to protect the connection between moving parts; a common example is a seal between the piston and cylinder bore. In general, within a hydraulic system, a seal exists to keep hydraulic fluid in and contaminants out.
Static seals usually only come in shapes and sizes intended to fit inside the joint between components. However, dynamic seals can be even further differentiated. There are piston seals that prevent fluid from escaping past the piston and control the motion of the attached cylinder. Rod seals place a film on the exterior of the rod passing through them that prevents rod corrosion. And buffer seals protect components from fluctuations in pressure within the system and keep out contaminants.
Texas Hydrostatics knows hydraulics from pistons to seals. If you want to talk about seals or any other component in your hydraulic systems, contact Texas Hydrostastics today.