Heavy duty solution for low and medium operations are widely used in the chemical industry and waterworks.
The US3A has a type A pinned stationary seat. Manufactured in accordance with UNI EN 12756 (ex DIN 24960).
The mechanical seal is suitable for clockwise and anti-clockwise rotation.

Because of the three drive lugs on the rotating body, they can tolerate high levels of vibration, and mechanical stress.
The O-ring is easily removable and fittered when assembling the seal on shafts with keyways, threads or sharp edges.
The US3A version is supplied with a single spring and is more suitable for moderately dirty liquids.