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As usual, all guess work based on insufficient data, round and round tail chasing - let's get some real information and save everyone's time. It is a capital mistake to theorise before one has data. Insensibly one begins to twist facts to suit theories, instead of theories to suit facts...

The application details and the current pump selections, including the performance curve would certainly help to clarify your concerns. It is a capital mistake to theorise before one has data. Insensibly one begins to twist facts to suit theories, instead of theories to suit facts. (Sherlock...

There is no need for a "giant dust thingy" do an internet search and you might be surprised what you turn up. "small dust cyclone" might help. It is a capital mistake to theorise before one has data. Insensibly one begins to twist facts to suit theories, instead of theories to suit facts...

Look at cyclone dust extracter. It is a capital mistake to theorise before one has data. Insensibly one begins to twist facts to suit theories, instead of theories to suit facts. (Sherlock Holmes - A Scandal in Bohemia.)

Agree with 3DDave, probably more effective to seal the plaster models. It is a capital mistake to theorise before one has data. Insensibly one begins to twist facts to suit theories, instead of theories to suit facts. (Sherlock Holmes - A Scandal in Bohemia.)

Good luck with that, but I would be surprised if that's the cause. It is a capital mistake to theorise before one has data. Insensibly one begins to twist facts to suit theories, instead of theories to suit facts. (Sherlock Holmes - A Scandal in Bohemia.)

Always difficult to analyse installation problems from a distance, however the very basics should be checked initially before removing and dismantling pumps. 1, is rotationc correct 2.have gauges been checked 3. are all valves fully operational and open, 4. Double check everything, never assume...

Double check all instrumentation and readings before worrying about the pump. It is a capital mistake to theorise before one has data. Insensibly one begins to twist facts to suit theories, instead of theories to suit facts. (Sherlock Holmes - A Scandal in Bohemia.)

Time to employ an experienced pump / system design designer, it's way beyond trying to use a free website for answers. Give a bit more information and at least you might get a few ideas as how to best approach this application. It is a capital mistake to theorise before one has data...

Just a little bit of additional info might assist, but please don't over do it and confuse everyone. It is a capital mistake to theorise before one has data. Insensibly one begins to twist facts to suit theories, instead of theories to suit facts. (Sherlock Holmes - A Scandal in Bohemia.)

BrianPeterson: what, isn't your crystal ball functioning? It is a capital mistake to theorise before one has data. Insensibly one begins to twist facts to suit theories, instead of theories to suit facts. (Sherlock Holmes - A Scandal in Bohemia.)

Pump duty power will increase by atleast 25%, therefore supply current will need to be considered as well. It is a capital mistake to theorise before one has data. Insensibly one begins to twist facts to suit theories, instead of theories to suit facts. (Sherlock Holmes - A Scandal in Bohemia.)

is there any reason why the baseplate can't be removed and spacer pads welded onto the existing positions, redrilled and the whole baseplate machined? It is a capital mistake to theorise before one has data. Insensibly one begins to twist facts to suit theories, instead of theories to suit...

Probably, what happens when you fill container B how do you return the piston to its original position is it a continuous operation. It is a capital mistake to theorise before one has data. Insensibly one begins to twist facts to suit theories, instead of theories to suit facts. (Sherlock...

Your question has been answered, for a standard mass produced pump of this size, the efficiency quoted is in the right ball park. For higher efficiencies you need to be looking at much larger well engineered pumps built to exacting standards, and yes you can get to 90% plus but certainly not at...

Under the motor, yes. It is a capital mistake to theorise before one has data. Insensibly one begins to twist facts to suit theories, instead of theories to suit facts. (Sherlock Holmes - A Scandal in Bohemia.)

Depends on the baseplate / boltdown location - are the mounting pads machined and level etc, a poorly designed base might require some shim to ensure the pump case is not stressed or twisted. It is a capital mistake to theorise before one has data. Insensibly one begins to twist facts to suit...

Yes. It is a capital mistake to theorise before one has data. Insensibly one begins to twist facts to suit theories, instead of theories to suit facts. (Sherlock Holmes - A Scandal in Bohemia.)

I think you could dismiss the suction pipe work as being the cause as there is certainly enough straight run of pipe after any bends etc leading to the pump inlets to ensure flow into the 3 units is ideal, the only other concern could be some form of pre-rotation - however this would be a long...

Heavyside1925: Looks more like corrosion erosion than cavitation, to the point I would say it's not cavitation. A few photos of the impeller would be of interest. It is a capital mistake to theorise before one has data. Insensibly one begins to twist facts to suit theories, instead of theories...