PUMPS, VALVES & ACTUATORS ACTUATORS PROVE TO BE A COOL REPLACEMENT
AUMA PROFOX actuators are proving themselves in the district cooling network of Qatar Cool. The network is for Pearl-Qatar, an artificial island close to Doha, Qatar. These actuators replace actuators of a different brand
IE3 motors as standard and optimum energy savings can be achieved in combination with the KSB SuPremE IE5 motor. Pump sets fitted with the PumpDrive speed control system and the PumpMeter monitoring are recommended for fluctuating flow requirements and varying intake pressures. The latest Movitec models have the option
of an impeller design that improves the pumps’ suction characteristics (NPSH value). The impeller can be used with a number of Movitec variants without necessitating modifications to the outer pump casing. This impeller features a modified inlet diameter, vanes allowing a slightly diagonal through- flow and a newly designed stage casing, all of which serve to improve the pump’s NPSH curve. This proves its worth in applications with
critical inlet conditions (e.g. boiler feed applications) as well as applications in which the pump is required to take in water from low-lying tanks or at higher temperatures. Under these conditions, a pressure drop in the intake area may cause cavitation to occur in
which, although only a few years old, did not stand up to the process conditions. Failures in the actuator electronics were frequent, and the hard plastic gears were worn out and could no longer deliver the required torque. PROFOX actuators proved to be the perfect solution for
the requirements of Qatar Cool, thanks to their high- precision mechanics and their innovative design. A key benefit for the customer is easy operation of the actuators via Bluetooth, using the AUMA Assistant App. This means that the actuators can be easily operated locally, even though they are installed at a height that is difficult to access. In addition, the FOX-EYE indicator light clearly shows the actuator status, even from a distance. The actuators also provide numerous feedback signals, which the customer uses for process supervision. Five PROFOX PF Q-300 part-turn actuators are currently in operation at Qatar Cool. They control
the supply of chilled water from the district cooling network to the main heat exchanger of one of the connected buildings. More are to follow.
www.auma.com
the first pump stage. This can result in excessive wear of pump parts or motor bearings as well as a reduced service life of the pump due to damaged parts and an unbalanced hydraulic system. The Movitec pump series is supported
globally by KSB Group companies and distributors. For Byworth, which has a global
demand, this network is important. Jason Atkinson qualifies his choice of
Movitec pumps: “They’re the most reliable in the industry, have a good price point and we have a good history with KSB.”
KSB
www.ksb.co.uk
Supplying quality products & service since 1975
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UK Official
Distributor Since 1983
www.dualpumps.co.uk Call 01664 567226 for more information Dual Pumps 135x195
Sept.indd 1 13/09/2021 16:02:28 SEPTEMBER 2021 | PROCESS & CONTROL 25
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