DOSING PUMPS & CONTROL SYSTEMS
Initially dosing pumps employed stroke length adjustment to alter output by reducing the volumetric stroke per pulse and then manual speed in addition to regulate the stroke frequency, i.e. number of strokes per minute. In the last two decades dosing pumps have seen tremendous developments. These include that include digital displays highlighting flow rate in lph or ml/hr making them easier to use within all chemical metering applications, to automatic degassing heads or valves for sodium hypochlorite, variable speed stepper motors offering quieter, smoother and almost continuous dosing and ideal for use where noise limits prevent the use of noisier solenoid dosing pumps.
Lutz-Jesco dosing pumps have been used within pool water treatment for over 50 years. Key OEMs including JAK Water System where Lutz-Jesco Memdos E / Memdos LB motor driven mechanically actuated diaphragm dosing pumps have been used for dosing calcium hypochlorite from their Flowtab tablet feeder to Gaffey Technical Services Ltd who have been using the Lutz-Jesco Minidos dosing pumps on their Hyprolyser Compact Skid electrochlorination systems.
PREDICTIVE DOSING WITH POOLPERFECT’S INTELLIDOSER Low cost pool dosers generally use a simple control loop while the best expensive systems can sometimes include automatic temperature compensation. However Intellidoser from PoolPerfect, a small UK company with a long history in precision electronics, uses an internal computer with predictive algorithms. For example, it monitors the water temperature and, should this rise, then the system will actually predict how much faster the sanitiser will
management. What’s more, if you’re doing this all manually, it’s all too easy to have things go pear-shaped”
need replenishing and respond beforehand. This results in far more effective control. To date, pool dosers have always been non- predictive and they will wait until the next pump cycle only to find the water in a much poorer state than expected and have to dose very hard to recover. This risks losing control and the pool turning green due to the extreme conditions. A predictive algorithm will predict and avoid this risk. The Intellidoser uses the latest
microcontroller and medical pump technology to provide a complete, affordable, one-box solution and is designed specifically for swimming pools of up to 120m3
.
FULLY EXPANDABLE PLANT ROOM CONTROLLER FROM AQUATROL SPATEX 2014 saw Aquatrol Ltd launch the latest in the BECSys range of controllers. The BECSys 7 is more than a chemical controller; it’s a fully expandable plant room controller. As standard the BECSys7 is supplied with total chlorine, free chlorine, pH, conductivity and pH measuring sensors, which will monitor and control the pool water chemistry to ensure the pool stays within predetermined parameters. But the BECSys7 goes beyond water chemical control, some of the features include, automatic backwash, pressure differential, system flow, flow volume,
turbidity or manual. Monitoring the backwash holding tank will prevent overflow. Automatic water make-up will replenish the pool. Circulation pump on/off is controlled based upon various sensor settings such as balance tank low level, strainer high vacuum or energy conservation mode, also a variable frequency drive interface. Flow rates are displayed and logged, a low flow rate will disable chemical feeds.
The unique energy conservation control functions mean that the controller can control to alternative set points. This means that the pool can run at lower more cost effective settings, during periods of low usage. The unit also has an energy conservation mode, a ‘sleep’ mode which suspends mechanical and chemical functions during off hours ‘waking’ periodically to keep water quality in check.
All the above is supported by BECS for
Windows, to enable remote off site control to support email alarm notification plus monitoring water quality, changing settings and reviewing historical graphs can all be achieved through a smart device.
FOR FURTHER DETAILS:
Aquatrol Ltd 01444 401955
www.aquatrol.co.uk
Certikin International 01993 777200
www.certikin.co.uk
Golden Coast 01271 378100
www.gctrade.co.uk
Grundfos Pumps Ltd 01525 850000
www.grundfos.co.uk
Lutz-Jesco (UK) Ltd 0121 782 2662
www.lutz-jesco.com
Pollet Pool Group 01635 234038
www.polletpoolgroup.co.uk
PoolPerfect 01473 736497
www.poolperfect.co.uk
The BECSys range from Aquatrol includes the BECSys 7 – a fully expandable plant room controller
Topline Electronics Limited 01323 440 760
www.topline.uk.net
56 December 2014 SPN
www.swimmingpoolnews.co.uk
Maintaining clean, safe water quality all year round requires ongoing, careful
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