Date: 2013-08-01

Split-to-the-shaft design and improved sealing of Revolvo's SRB bearings has resulted in massively reduced maintenance on orbital aeration tanks at a Wessex Water treatment plant

The bearings allow easy maintenance, without having to remove the shafts of long horizontal rotors that agitate sewage and introduce oxygen to the treatment process.

Previously, a crane was required to remove the solid support bearings, at a cost running to thousands of pounds per day.

In addition, the sealed SRB bearings are designed to withstand full submersion in sewage sludge, which can occur due to raised levels in the aerator tanks during periods of heavy rainfall.

In brief detail, each of the aeration tanks has several horizontal rotors that agitate the sewage, which, in the past, were supported by two solid bearings with internal seals.

However, during periods of heavy rain the sludge level can rise to the point where the bearing units become temporarily submerged, compromising the bearing seals and leading to premature failure.

In an effort to reduce maintenance, Revolvo was asked to find a solution

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