Hydraulic seals, also called hydraulic cylinder seals or shaft seals, are parts used to keep fluids from escaping from cylinders, at the same time preventing contaminants from entering into cylinders.

They are critical parts in many types of machinery since they help create a method for fluid power to be converted into linear motion. These seals need to be designed and produced to withstand high pressure, or even high temperature in many of industries, in this case, the function of Hydraulic seals is not only preventing leakage of fluid from the Cylinder, it is also challenging for seals.

There’re combinations of seals, including hydraulic rod seals, hydraulic piston seals, wear rings or guide rings, scrapers or wipers. The functions of each are different.

The rod seals prevent leakage of fluid from within the cylinder to the outside; Hydraulic Piston seals prevent fluid from flowing across the cylinder head; Wear rings guide the piston and piston rod within the hydraulic cylinder; Wipers scrape dirt or chips from the piston rods preventing contamination.

JST supply various types of hydraulic seals, and we’re able to do the tests related to temperature, pressure, tensile strength, reciprocating, etc. You’re welcome to reach our sales for price lists.