• A4 Engineers

Hydraulic & Pneumatic Packings

A4 Engineers offers Hydraulic and Pneumatic Packing Seals, a class of seals that are used in applications with either rotary or reciprocating motions. Pneumatic seals are exposed to air with a minimum amount of lubrication. They are often used in pneumatic cylinders and valves and usually are not under high pressure, but exposed to high operating speeds. Hydraulic seals are exposed to hydraulic fluids such as hydrocarbon and phosphate ester and are designed for high-pressure dynamic application. These are usually required to be higher friction seals than pneumatic seals but often under lower operating speeds. The company offers a wide range of standard and custom sized seals for pneumatic/hydraulic cylinders. These include: buffer seals, dust/wiper seals, rod seals, piston seals, wear/guide/slide rings or tapes, vee packing seals.