When looking to purchase a pressure cleaner, you can find that there is many different types and sizes to choose from. To choose the right model for your application is very important, therefore the more information you have when purchasing, the better.

First of all water flow (referred to as liters per minute or LPM) that the machine pumps is one of the most important things to look at. The more liters per minute gives an indication of the time it would take to do a job. As an example, you could compare the water flow from a garden hose as opposed to a fire hose. Therefore the time you want to take to do the job is governed by the liters per minute the pressure washer pumps.

The higher the water flow the better cleaning effect and end result you will get as water is the element that actually does the cleaning. It is a common belief in the market that the bigger the pressure the better the machine is and the better cleaning performance is achieved, however this simply is not the case. Pressure cleaners delivering 10 liters of water per minute at an operating pressure of 1600 PSI will clean a lot better in less time while achieving greater results than a machine delivering 7 liters a minute at 2000 PSI. The story with a pressure cleaner is really about the water flow rate.

The second thing to look at is pressure which is needed to remove whatever substance you are trying to clean e.g dirt, grease, mould. Whilst water flowrate is paramount in ones consideration of a pressure cleaner, it is the combination of flowrate and pressure which gives you the better cleaning result. A pressure cleaner delivering a flowrate of 10 liters per minute at 1500 PSI will not clean as well as pressure cleaners delivering 10 liters at 2000 PSI which is different again to the previously mentioned example machine delivering a flowrate of 7 liters at 2000 PSI.

The next thing to consider is how much work you have for the high pressure cleaner for example cleaning around the house car and boat or in a business using the pressure washer three or four hours a day. This is where the manufacturing parts of the motor and pump need to come into consideration so you get what is suitable to you.

Typically, there are two types of motors which are used on most machines. There is the brush motor and the induction motor. Brush motors are generally found in smaller machines which suit light application use and should only be used for small periods at a time. If you are looking to use a machine for heavy application, an induction motor is a must.

Pump construction is another that should be looked at closely. There are generally three different types of pump constructions found within the industry.
Constructions to consider are

Motor type and size e.g brush motor or induction motor
Brush motor for small domestic use
Induction motor for more heavier usage e.g large concrete areas and industrial use

Pump construction
Fibre anti lime – light domestic use
Alluminium – heavier usage
Brass – industrial

Be sure to buy the right machine for the right application not just on price.


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