Thermo Scientific Masterflex* Pumps Outperform AOD Pumps With Less Energy Use, Less Process Downtime0 pages

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Application

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Note: 0123

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KeyWords

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• Masterflex

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• Ponndorf

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• Peristaltic Pumps

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• Tubing Pumps

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• AOD Pumps

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• Air Valves

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• Check Valves

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• Seats

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• Lifecycle Costs

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• Pressure

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Fluctuation

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Thermo Scientific Masterflex Pumps

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Outperform AOD Pumps With Less Energy

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Use, Less Process Downtime

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Gregg E. Johnson, Thermo Fisher Scientific, Fluid Handling, Barrington, IL, USA.

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Air-operated diaphragm (AOD)

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pumps are often chosen due to

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their relatively low initial cost.

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Users, however, often find this first

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cost doesn't look as good once the

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pump's high life cycle costs start

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factoring in — including high energy

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consumption, expensive rebuild parts,

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and expensive downtime.

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AOD pumps have numerous points

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of failure, including diaphragms

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subject to rupture, air valve

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mechanisms that freeze up, check

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valves and seats prone to abrasive

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wear and clogging. They are also

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inefficient due to the consumption

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of compressed air. Fluid changes

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and cleaning AOD pumps are a big

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hassle, too - plus, they generate a lot

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of noise.

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Less shear, less energy usage

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Like AOD pumps, Thermo Scientific

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Masterflex® peristaltic pumps

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handle a wide variety of solids

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and viscosities, but Masterflex

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pumps consume 4-6 times less

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energy and won't damage shear-

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sensitive products. Maintenance

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requirements for AOD pumps

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are often time-consuming and

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expensive, involving check ball,

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diaphragm, and seat replacement,

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and performing air motor rebuilds.

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Masterflex pumps provide superior per-

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formance when pumping fluids with undis-

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solved solids that can clog check valves in

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AOD pumps.

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Masterflex pumps, as well as our

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Ponndorf hose pumps, can be

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serviced in place by simply changing

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or sliding the hose or tubing. The

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pump's hosing or tubing is its only

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wear component.

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Lower lifecycle costs

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Lifecycle costs for Masterflex and

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Ponndorf pumps are much less

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than for AOD pumps. There's no

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excessive downtimes for cleaning,

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stripping and repairing with our

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systems - service means only a

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quick tube or hose replacement.

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AOD pumps can run to catastrophic

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failure leading to pumpage leaks

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into the air motor, whereas pump

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hose or tubing failure with our

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systems can generally be predicted,

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allowing for proactive maintenance.

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AOD pumps can pump in only

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one direction, but our pumps

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are bidirectional, providing you

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with both great performance and

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flexibility.

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Masterflex or AOD pumps:

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Which is best?

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Air operated diaphragm (AOD)

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pumps are relatively inexpensive to

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purchase, but they

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come with a lot of

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drawbacks - heavy

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pulsation, stalling

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valves, costly spares,

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noisy operation,

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downtime. Energy

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usage for an AOD

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pump is high, and

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the uneven flow and

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the pressure fluctuations from the

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air compressor can often cause

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inefficient performance.

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AOD Pump

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