Ragazzini’s Rotho peristaltic hose pumps

Ragazzini’s Rotho peristaltic hose pumps are now available from Hydro Innovations.

The pumps are suitable for use with a range of substances within several industries including the chemical, food, mineral process, water +wastewater, paper, marine, and paint sectors.

‘Peristalsis’, the positive displacement process used by the pumps, is not a mechanical invention. In fact the process is used by biological systems such as the gastrointestinal tract.

Just as muscles in the gastrointestinal tract move food through our bodies by contracting and relaxing, the hose pumps employ rollers to move fluid through an elastomeric tube.

The pumps do not require a lubricant and the fluid is completely contained within the tube. It comes into contact with no other mechanical parts. Therefore, there is no risk of contamination and the pumps are suitable for use with food products. CIP and SIP systems also work well with these pumps because the retractable rollers allow full flow of cleaning and/or sanitising fluid through the full diameter of the hose.

But they are not only suitable for use in the food sector. In fact, the types of substances they can pump is very broad. They can be used with viscous, abrasive, and/or corrosive substances. And they can handle mixes of liquids and solids.

The fact that no lubricant is needed also means that tubes have a long working life. And tube replacement is easier than in pumps that use lubricants because there is no need to drain and dispose of messy substances.

The pumps can run dry without being damaged and creating a reverse flow is as simple as reversing their motors. Valveless, seal-less and glandless, they can pull at 98% of full vacuum force. They offer flows of up to 60,000 litres per hour and pressures up to 15 bar.

The pumps have another feature that sets them apart from their competitors. They have a leak detector (which is optional for PSF Serie) which can provide early indication of hose failure.

This consists of a float type sensor that is located at the lowest point of the pump housing. Apart from early leak detection, it translates to less leakage and better containment of the pumps media and reduced risk of main rotor bearing contamination.

Rotho peristaltic hose pumps are available in three models – Serie PSF, for flow rates up to 40 HL/hr; Serie MS, for flow rates up to 108 HL/hr; and Serie SDSF, for flow rates up 700 HL/hr.

Selection of the most appropriate internal hose depends on the chemical compatibility, operating pressures, temperature and duty cycle of each specific application.

Hydro Innovations’ informative staff are always on hand to provide advice on model selection and any other relevant information.

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