Mechanical Seal SA
29 September 2017
Mechanical Seal US3A
29 September 2017

Mechanical Seal US4A

Heavy duty solution for low and medium pressures.

Heavy duty solution for low and medium pressures operations are widely used in the chemical industry and waterworks.

The US4A is the shorter version of US3A, single component seal with a type A pinned stationary seat and it.
Allows rotation in two directions.
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 removed and refitted when assembling the seal on shafts with keyways, threads or sharp edges.
The US4A version in supplied with a single spring and is more suitable for moderately dirty liquids.


20 – 100 (mm) *0 – 20 (m/sec)0 – 12 (bar g)-100 – 250 (°C)
(*) for measurements in inches, please contact our technical sales office.



  • Single seal
  • Bi-directional
  • Suitable for dirty liquids
  • Resistant to acids and bases
  • Resistant to mechanical stress
  • Configured with FLUIGAM (energized dynamic o-ring)


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