Brinkmann worn impeller

Comments 0 by in Pump Repairs
April 16, 2013

The pump had lost it’s pressure, and at first glance the impeller appears to be in good condition. It’s actually worn out due to pumping unfiltered grinding paste/coolant. The impeller has an almost polished appearance, and in worst case scenarios the edges can become paper thin and razor sharp.

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Cavitation on an impeller

Comments 0 by in Pump Repairs
April 16, 2013

An impeller from a 75 Kw end suction pump. Looks like corrosion, but it’s actually caused by early stages of cavitation, which in a nutshell, is the formation, growth and collapsing of bubbles in the liquid being pumped. Pumps can actually shake themselves to bits if cavitation is left to it’s own devices. Another example…

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Aro 666 air operated double diaphragm pump repair

Comments 0 by in Pump Repairs
April 16, 2013

We also repair air operated double diaphragm pumps. This is an ARO polypropylene pump that had been pumping a water based glue. All the ball valves, o-rings and diaphragms were replaced, and a new and air valve repair kit fitted. Here’s a close up of one of the valves, cage and seat being disassembled:

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Weir Pump Repair

Comments 0 by in Pump Repairs
April 16, 2013

The data plate was from one of these four Weir pumps which are pumping mains water, but are sited in a very acidic area, which is why the data plate had corroded so badly. Here’s the pump pre-repair: Here’s the corroded data plate: The Weir pump undergoing a Hydrostatic pressure test (1.5 times it’s normal…

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