Mar 4, 2016

Marine pump casings refurbished at a fraction of replacement cost

The client, the operator of polar explorer vessels, doubted they could save the two Seawater Ejector Pump Casings taken from one of the ships in their fleet.  Such was their misgivings that in documentation they reported:  ‘Severe Erosion Damage – May Not Be Repairable’. 

The client, the operator of polar explorer vessels, doubted they could save the two Seawater Ejector Pump Casings taken from one of the ships in their fleet.  Such was their misgivings that in documentation they reported:  ‘Severe Erosion Damage – May Not Be Repairable’.

The client sent the pumps to our Leeds factory for an evaluation report.  When we inspected them we were able to report  that they could in fact be fully restored, a contract was issued for this work.

The casing and impeller were stripped then blast cleaned which further identified areas of serious internal pitting and erosion. Once pre-machined, the casing internals and the impeller were coated using Corroglass 600 Series system which combined with in-house developed engineering methods meant that the damaged areas could be re-built.

Following adequate cure of the coating, the refurbished impeller was balance checked in house to BS6861 – g2.5. The pump casing externals were coated with Plasmet ZF and Corrothane AP1 coating system. A new shaft, sleeves and casing rings were manufactured and machined.  The pump was then reassembled using new fasteners, gaskets and packings.

The refurbishment to both pumps was completed at 20-25% of the cost of purchasing new and took just two weeks to complete. The life span of the pumps has been extended by in excess of 10 years.

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