Verderflex Solves Zurich Airport Water Problem
Published on by Water Network Research, Official research team of The Water Network in Technology
Verderflex Peristaltic Pumps Replaces Mag Drive Pumps in Water Treatment to Prevent Scaling in the Pipework at Zurich Airport
Verderflex provided a solution to a Swiss airport that had been experiencing significant problems with their water softening treatment.The local water supply required treatment to prevent scaling in the pipework.
The challenge
The existing treatment system required a salt solution to be dosed from a storage tank close to the pumps over a 350 m pipe-run to the water supply. The piping system had a series of valves and pipes which were not sealed correctly when they were installed and the pipe work contained a large proportion of air.
Consequently, although the magdrive pumps which were transferring the solution were of good quality, intermittent use meant they ran dry, leading to bearing failure. These mag drive pumps had to be replaced everythree months, resulting in plant downtime and high maintenance costs.
Due to the scale of the airport's construction and layout, it was not possible to install new pipe work and valves and a far more robust pumping solution was required which would not only dose the solution accurately, but also one that required less maintenance when compared to a mag drive centrifugal pump.
The Solution
Verderflex's local distributor recommended a Verderflex Dura 35 peristaltic hose pump for this application. A peristaltic pump consists of a hose, which is housed in a casing and squeezed by a rotor, which determines the speed (RPM) of the pump. As the only part in contact with the fluid is a flexible hose, the pump can run dry and certainly tolerate air in the pipes. The pump itself was sized to run slowly, so as to increase the hose life.
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