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SPN DEC 2010 Dosing
www.swimmingpoolnews.co.uk
“Overall specifying a dosing system needs to be carefully selected for each application as there are always so many ways to ‘skin a cat’”
Solenoid pumps are preferred in most commercial applications as they have more ‘power’ to pump against pressure/resistance and can pump higher volumes. We all know most of the hypochlorites have a tendency to block conventional injectors.
Peristaltic pumps are preferred for the domestic /hotel market where pumping volumes are lower and less frequent. The peristaltic principle (i.e. like a kidney dialysis machine) can self prime far easier than the solenoid type. They are also much quieter in operation and do not vibrate/pulse in a domestic plant room. For domestic situations Complete Pool Controls suggest automated pH control combined with non chlorine dosing or conventional redox measurement. The CPC50 Blue Horizons units have been very successful in this area and utilise good quality peristaltic pumps. The latest economy domestic system is the CPC2500 Kleenpool units which also utilise in-built peristaltic pumps. Complete Pool Controls resident automatic dosing expert, Andy Page suggests always making contact with the supplier of any dosing equipment before coming to a decision on what should be installed saying: “Overall specifying a dosing system needs to be carefully selected for each application as there are always so many ways to ‘skin a cat’.”
The easy to use Pulse dosing pump from Pentair – this version featuring digital display
Economic Precision
When designing the Pulse, Pentair wanted to develop a resistant dosing pump that is easy to use and able to handle all types of chemicals available on the market.
What they came up with is a product that is precise and economical. The Pulse dosing pump is of the proportional electro-magnetic type: injection of the product is gradually reduced as the target value is approached but without ever exceeding it.
The system is practical and simple to use. Its digital or LED display provides a simple and reliable readout on the control panel. The Teflon® body and PVDF head provide excellent resistance in all conditions offers a sound robustness backed up with a 2 year guarantee. The Pulse is also totally secure as all adjustments are password protected. A complete system, Pulse is delivered with an analysis probe, empty reservoir warning and innovative adhesive pick-up collars.
The Pentair Pulse is available in two versions: 2 litres/h at 2 bars (LED display) and 10 litres/h at 1 bar (digital display) for pH and redox dosing. By combining Pulse with the IntelliChlor electrolytic chlorine generator, you gain access to bathing comfort as well as to an exceptional degree of precision and security. spn
i FOR FURTHER INFORMATION
F AQUATROL ( 01444 401955 :
www.aquatrol.co.uk F CPC ( 01242 662700 :
www.cpc-chemicals.co.uk F GAFFEY ( 01706 233600 :
www.gaffey.co.uk F GOLDEN COAST ( 01271 378100 :
www.goldenc.com F GRUNDFOS ALLDOS ( 0121 328 3336 :
www.grundfosalldos.com F PENTAIR ( +32 1425 9921 :
www.pentairpooleurope.com F SEKO UK ( 01279 423550 :
www.sekouk.com F VERDERFLEX ( 0113 222 0281 :
www.verderflex.com
HOW SWIMMING POOL CONTROLLERS HAVE DEVELOPED
The development of chemical controllers within the pool industry leads us to the breakthrough developments made by Wallace and Tiernan with the use of chlorine gas. • 1940 Pioneered break-point chlorination
• 1949 Perfected a Chlorine Reissued recorder
• 1956 V-notel Chlorinator • 1960 Introduction of Compound loop Control
All chemical controllers used within the commercial swimming pool market were derived from industrial application, Capital Controls and Wallace Tiesnan being the market leaders with the use of chlorine gas.
This all changed with the decision to withdraw the use of chlorine gas from the commercial swimming pool market. From the early 70s through to late 70s early 80s new players appeared such as Stranco, ProMinent and Jesco to meet the demands of controlling liquid chlorine (sodium hypochlorite) as apposed to gas.
This period was a boom time for the industry and bespoke products were developed for the pool industry rather than using products employed within the industrial and clean water sectors. With these developments affordable products become available for use within the domestic market.
Development has continued at a pace as industrial demands call for new features and improved technology and reliability. But not all new developments are ground breaking a reported new technology being the photometric principle of reading a residual was available from Certikin Ltd in the early 80s.
spn (Swimming Pool News) would like to thank Bob Judd of Aquatrol for supplying this history.
Contact
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