Rotary Seals

AST’s Rotary Seal

Rotary shaft seals create a dynamic barrier between a rotating shaft and its stationary housing. Their main job is to keep lubricants inside the equipment while blocking external contaminants like dirt, dust and moisture from damaging shaft bearings.

Because performance depends heavily on surface speed, shaft hardness, pressure and fluid media, standard options don’t always cut it. AST designs rotary shaft seals using low-friction materials, including specialized rubber compounds and spring-energized PTFE. These designs minimize friction, prevent shaft scoring and lower heat buildup across high-RPM operating cycles.

Through our in-house production process, we maintain full control over lip geometry, spring tensioning, and housing fits. This is done to support linear, rotary, or multi-axis motion.

Custom Rotary Seals

Rotary seals are essential for reliable performance across a wide range of industrial equipment. When standard options are not suitable, custom seal designs provide targeted performance for specialized operating conditions.

Manufactured in-house, our rotary seals adhere to strict European productions standards. AST’s engineering teams uses field experience to help develop custom reliable sealing solutions tailored to your application.