HPU is Hydrolysis Resistant Polyurethane. It has excellent resilience property which is perfectly suitable for hydraulic applications.
Rotary seals are designed to seal the pressurized hydraulic fluid against the atmosphere, preventing leakage and pollution of the environment or to transfer liquids and/or gases from a stationary part into or out of rotating machinery. This is double acting rotary seal with interference of the O-ring on the OD and no Interference of the BFT on the ID.