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Application and methods
What
Techniques
Efficient high pressure cleaning is achieved by following a few guidelines, combined with your own personal
experience of specific cleaning tasks. Accessories and detergents, when correctly chosen, can increase the
efficiency of your pressure washer. Here is some basic information about cleaning.
Soaking
Encrusted or thick layers of dirt can be loosened or softened up by a period of soaking. This is for example an
ideal method within agriculture – for example, within pig sties. The ideal soaking method
can be achieved by using foam or simple alkaline detergent. Let the product lie on the dirty surfaces for about
30 minutes before pressure washing. The result will be a much quicker high pressure cleaning process.
Detergent and Foam Foam or detergent should be applied onto dry surfaces so that the chemical product is in direct contact with
the dirt. Detergents are applied from bottom to top, for example on a automobile bodywork,
in order to avoid "super clean" areas, where the detergent may collect in higher concentrations and streams
downwards. Let the detergent work for several minutes before rinsing and never let it dry on the surface being
cleaned.
Temperature
Detergents are more effective at higher temperatures. Greases, oils and fats can be broken down more effec-
tively at higher temperatures also. Proteins can be cleaned at temperatures of around 60°C (140°F). Oils and
traffic film around 70°C (158°F), and grease can be cleaned at 80°-90°C (176-194°F).
Mechanical Effect
In order to break down tough layers of dirt, additional mechanical effect may be required. Special lances and
rotary or wash brushes offer this supplementary effect that cuts through dirt.
High Water Flow
Highest pressure is not always the best solution and may also damage surfaces. The cleaning effect also
or High Pressure
depends upon water flow. Pressure levels of around 100 bar (1450 psi) may be sufficient for
vehicle cleaning (in association with hot water) and higher flow levels give the ability to rinse and flush away
large amounts of dirt easily.
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