REGULAR
MANUAL OR AUTOMATIC?
In this month’s column, Max Adam, Sales & Marketing Director at RP Adam, compares the benefits of automatic, venturi chemical dispensing systems with their manual counterparts when it comes to dosing concentrated chemicals.
Commercial cleaning operatives need to feel comfortable using concentrated chemicals. RP Adam has always viewed controlled dilution as a key driver in delivering best-in-class results in the simplest and most economical way possible. The more progressive chemical manufacturers should be striving to put as much in the bottle as possible in order to maximise positive environmental impact, while at the same time making it as safe for the end user to use.
Manual dosing systems are essentially non-electronic ways to dispense chemical concentrates into trigger spray bottles, mop buckets, washing up sinks and cleaning machines (such as pressure washers, carpet extraction machines and scrubber dryers). Chemicals are either manually
26 | Tomorrow’s Cleaning May 2016
dispensed into water or automatically mixed using water pressure.
In its most basic format, the simple 5l pelican pump is a manual dosing system which delivers a controlled 30ml dose of chemical with each press of the pump. Although it provides some control over free hand pouring guesswork, the downside with this is that there is nothing to stop the cleaning operative pressing the pelican pump numerous times – despite the manufacturer’s recommendations of how much to use.
There are also wall mounted manual pumps out there that look sophisticated, but many of them are just glorified pelican pumps because there is nothing to prevent the user repeat dosing. Why pay for this kind of
system when a standard pelican pump for around £1 will suffice?
The solution is to provide a manual dosing unit with some form of delay mechanism which prevents repeat dosing or to pre-mix chemical and water at source. Let us look at each of these options.
HUMAN POWER: MANUAL DISPENSING SYSTEM WITH
DELAY MECHANISM Unless there is a way to eliminate or, at the very least, delay the chance of a user repeat dosing there is very little point in using any manual dosing system. Many users incorrectly believe that as a general rule the stronger the solution the better it will work. This may be true if we are
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