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ollowing the highly successful, class leading Verderflex Dura 45 hose pump, Verderflex are proud to announce an expansion to the range, the Verderflex Dura 55.

F This innovative, superbly

engineered pump is designed to deliver over 20% more flow, increasing the Dura Hose pump family’s flow range.

The Verderflex Dura 55 is the class leader for this

size of peristaltic pump, significantly outperforming its competitors in both continuous and intermittent duty applications. The addition of the Verderflex Dura 55 expands the Dura range’s flow rates from <1 l/hr to 15.3 m³/hr at pressures up to 16 bar.

The Verderflex Dura 55 meets growing market demands for a pump that can reduce life cycle costs, maximise plant uptime and incorporate special design features for arduous heavy duty applications.


pumping problems associated with dry running liquid streams, shear sensitive polymers,

Verderflex Dura 55 solves high

viscosity sludge and pastes, variable speed dosing, abrasive solids in suspension and off-gassing fluids. This makes the Verderflex Dura 55 ideal for use in a wide variety of applications including; biogas production, brewing, fly ash recirculation, chemical manufacturing, industrial processing, mining and water treatment.

Low life cycle costs The Verderflex Dura 55 delivers more flow per revolution. This significantly increases hose life by decreasing the number of revolutions to pump a given volume for longer hose life and expanded maintenance intervals.

A key attribute behind lowering user’s life cycle costs is the renowned, premium quality Verderflex hose. Like all Verderflex hoses, the Dura 55 hose has the optimum design to maximise strength and longevity.

Maximise plant uptime The Verderflex Dura 55 has a unique, patent

pending port flange that totally encloses the hose. This unique flange design also includes an innovative quarter turn lock system, halving hose


change times to maximise plant uptime. Normally, supplied in 316 Stainless Steel, this flange design also has optional PP & PVDF inserts for aggressive chemical duty options.

Heavy duty design The Verderflex Dura 55 heavy duty design guards against blockages and chokes with its advanced stalled rotor protection technology,


visible slippage indicators. This advance eliminates potential rotor, rotor shoe or gearbox damage when the pumped liquid settles out or a line chokes, reducing both maintenance costs and production downtime. This key design feature enhances the Verderflex Dura 55’s suitability for pumping sludge, slurries and all kinds of vicious and waste liquids.

Reinforcing the heavy duty design is the pump’s casing and rotor, made from high tensile strength SG iron unlike the lower specification GG iron used by many competing products. The Verderflex Dura 55 pump’s rotor shoes are fully supported, eliminating potential stress weak points.

Case Study: Water Treatment upgrades to Dura Hose Pump

check valves which wear out and cause efficiency loss.

Traditional diaphragm-style metering pumps use Because this well site is unmanned, water

plant supervisor Mr. Gibson or his associates had to make daily trips to the site in order to check the pump’s efficiency. was

becoming department.

Solution Verder’s

Environmental, local representative, GPM introduced the plant to the

Verderflex Dura, a peristaltic metering pump that does not suffer from abrasive wear and does not lose efficiency over time. Mr Gibson purchased one unit and was immediately pleased with how smoothly and quietly the unit ran compared to the old diaphragm pump. After the initial two month installation period, Mr Gibson quoted that:

“The old pump lost flow and we had to constantly check on it.

consistent; we never have to adjust it.” Result

As an added bonus, Verder was able to retrofit the existing motor and VFD, saving over a thousand dollars in equipment cost. All in all the plant is very pleased with the value delivered by Verder, and is looking forward to upgrading all of their diaphragm pumps to Verderflex Dura Hose Pumps.

The Challenge A water treatment plant in the US state of Georgia uses several wells to provide its residents and industries with fresh water. Each well site had to be equipped with the appropriate treatment equipment to ensure that the water meets and exceeds regulatory requirements.

The new pump is very a

This took up a lot of time and major

headache for the

One such well site used a diaphragm-style reciprocating metering pump to pump lime slurry directly into the well output.

12 hours per day and discharges either to the system or to the tower for storage.

demand is up to 11.4 litres per minute (3 gallons per minute) and must be pumped at pressures exceeding 4 bar (60 psi).

The well runs about Lime slurry

Verderflex Tel: 01924 221 020 Web:


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