What is a hydraulic seal?

A hydraulic seal is a device that restricts the escape of fluids and foreign materials from entering its hydraulic application. Cylinder type applications would be good examples of hydraulic seals. These seals are designed to manage high pressure dynamic applications. They are installed to numerous types of machinery. The hydraulic seal remains an important component for ensuring that the set machinery is able to function correctly. Customized hydraulic seals are being used for the carrying out of rotary and reciprocating motions.

Hydraulic seal options include the following – rod seals, piston seals, rotary shaft seals, symmetrical seals and static seals. Components that go with the hydraulic seals include wipers, U cups, gaskets and oil and grease seals. Depending on the type of hydraulic seal being built, and its use, a variety of rings will be attached. These include V rings, wear rings, O rings, buffer rings, cast iron piston rings and backup rings. Apart from producing rotary and reciprocating motions, hydraulic seals will also be single or double acting.

hydraulic seals

Single acting hydraulic seals will be used to produce one axial motion only. Double acting seals, on the other hand, will be used in both directions in order to produce the reciprocating motions. Hydraulic seals are made from a variety of materials. These include – nitrile, polyurethane, silicone and fluorocarbon rubber. The seals will also be made from nylon and fabric reinforced rubber. And they can be molded from leather as well. PTFE used is bronze, nickel and glass filled, as the situation requires.

Other materials sourced for use have been abbreviated to EPDM and POM. Look up the acronym on the internet and you will be presented with the full definition. Interested readers can also source recorded demonstrations on how these seals operate.