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+44 (0) 1799 551199
+44 (0) 1799 551199
Item code: 010CA90
The SSD version of the Select-640 doser is often useful in glasshouses where a large (100mm and above) water meter needs to be used. Large water meters often send out 1 pulse per 100 litres of water flow. If the water lines are being cleaned with e.g. hydrogen peroxide, it is possible 100ml product will need to be doser for each water meter pulse received. This doser makes this possible.
Of course, normal routine dosing at up to 1:100,000 is also possible with this doser.
There are several reasons. With the dosed product kept inside the pump tube, even strongly corrosive liquids don't harm the pump, and there are no product residues in the pump to contaminate the dosed product. A win win.
Servicing of both diaphragm pumps and the Dosatron type doser can be fiddly and time consuming. Changing a pump tube in the Select doser takes around 23 seconds. This effectively services the doser.
The Select doser does not suffer from air locks. a huge advantage when dosing products that can generate gas bubbles.
It all depends on four things - the water line pressure that you are dosing into, the product being dosed, the condition of the rollers and the number of times the rotor squeezes the tube.
Choosing the correct ratio to dose the original concentrated product will save the tube being worn by pumping excess water from a stock solution. And - change the pump tube regularly to avoid it splitting. Leaked product can damage the rollers.
Almost anything. If you try to pump highly concentrated formic acid you will be out of luck. Nothing can withstand that!
Diaphragm pumps can certainly pump at a higher pressure than a Select doser, but that is pretty much the only advantage.
99% of the time there is a low pressure point on a water line to dose into. Having actual dosing ratios (and flow data) shown on-screen on a Select doser, having superb accuracy of dosing and not suffering from airlocks all count towards the Select doser being a superior choice.
