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Tough gear pumps won't leak

A Michael Smith Engineers product story
Edited by the Engineeringtalk editorial team Feb 11, 2002

Choice and flexibility, along with characteristics such as reliable, leak-free pumping, are the key ingredients of the Liquiflo Rotogear range of external gear pumps.

Choice and flexibility, along with characteristics such as reliable, leak-free pumping, are the key ingredients of the Liquiflo Rotogear range of external gear pumps, available through Michael Smith Engineers.

Liquiflo pumps, which can be supplied in a variety of materials and sizes, are particularly suited to metering applications where the combination of pulse-free flows and small volumes are important.

The Liquiflo range is very extensive, offering users a basic choice of 21 different pump sizes, although depending on the application and actual pump specification, the range is limitless.

The range covers three types of pump, the 4, 3 and H series.

The 4 series magnetically coupled pump is capable of flows up to 10 litre/min and a maximum of 7bar and is designed to be close-coupled to IEC71 frame motors.

The 3 series, supplied either as magnetically coupled or conventionally sealed, delivers flows up to 185 litre/min and a maximum of 7bar.

Finally, the H series, available as magnetically coupled or conventionally sealed, is capable of flows up to 88 litre/min and a maximum of 15bar.

The key hydraulic features include, pulseless flows, low NPSH, high metering accuracy from 0.5 to 2.0%, self-priming, low flow with high head on thin fluids (eg 0.3cps) and ability to transfer high viscosity fluids (up to 100,000cps).

Liquiflo pumps meet the critical demands of safety and reliability with features such as highly corrosive resistant materials and rugged construction, while the magnetic drive designs eliminate the potential for leakages as there are no shaft seals to maintain.

All the 3 series pumps are available in a wide choice of materials, housings can be supplied in 316 stainless steel, Hastelloy C and titanium.

Internal components can be specified in special materials to maximise pump life such as, PEEK, teflon, silicon carbide, tungsten carbide, carbon or Ryton.

Specific applications include pumping molten sulphur as part of a sulphuric acid manufacturing process, taking samples of hydrocarbon including crude oil to feed through analysers, pumping boiling solvents from distillation columns, pumping hydrochloric acid on metering applications in pulp and paper mills and pumping photographic chemicals and emulsions in the production of photographic film and paper.

Find out more about this article. Request a brochure, download technical specifications and request samples here.

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