How A Pressure Washer Works

We are talking, after all, of a simple machine both in its operation and in its use. Below we explain its secrets.

You saw it used by your neighbour and you got curious. That strange machine that sprays water under high pressure is a good pressure washer. What good is it you got there well: its purpose is to clean dirt, but not just any. The pressure washer comes into play, especially when secure manners are needed. Think of the oil stains left on the garage floor or the driveway by your car, or the excrements “gently” issued by the birds, and still the moss that grows on the walls. In all these cases and many others, the pressure washer performs effective and fast work.
Of course, not all of them are the same. There are the less powerful ones, the more powerful ones, the hobby ones and those suitable for professional use. In short, whatever your need, there is the right pressure washer. But before going to buy one, just because you have seen it used by the neighbour and maybe even having fun, let’s try to understand something more.


The characteristics

The core of our article wants to be an understanding of how it works, but first of all, it is better to know its most essential features. Great attention must be paid to two values which are flow rate and pressure. Let’s start with the flow: its value is expressed in l / h, and in practice, it concerns the quantity of water supplied in 60 minutes. The pressure, however, involves the power of the water jet; in this case, we speak of bars. These two characteristics are the main ones to consider when choosing the model to buy.

But what does the high-pressure jet generate? A pump powered by an engine; this can be electric or petrol. It is also essential to know that high-pressure cleaners can emit a jet of cold and hot water. The latter is even more effective against dirt, especially against oily dirt. Hot water high-pressure cleaners are widely used in the professional sector, but hobbyist models capable of heating the water are also available. Many models also offer the possibility of using detergent.

The effectiveness of the pressure washer passes from the appropriate use of the accessories. There are models well equipped from this point of view, while others require separate purchase. We mention some of the most common accessories. The various types of nozzles, brushes, gun, lance, floor washers, accessories for unclogging pipes and sandblasting are useful for removing paint and rust. Those models equipped with wheels should be taken into serious consideration because they are more comfortable to move.


The operation

The pressure washer is not a complex machine in operation. The engine has the task of running a pump that puts the water under pressure thanks to pistons that can be made of steel or ceramic. There is a regulating valve which, as the name suggests, gives the possibility to regulate the quantity of water to be recycled in the head.
But in the case of hot water high-pressure cleaners, how does heating occur? Thanks to the coil of a boiler. The path of the water is as follows: the liquid, pushed by the high pressure, passes along a tube to reach the spear or the gun and therefore to exit from a nozzle.


Some possible applications

The pressure washer is for cleaning; let’s assume there is no doubt about this. But what are the possible applications? Different from telling the truth, even in the domestic sphere. The only recommendation is to be careful not to overdo it in the sense that some surfaces could be damaged, for example too high pressure could remove the paint, just for example.
Recommendations aside, you can use the pressure washer to wash the car, not only the bodywork but also the engine. It is excellent for cleaning the floor of the garage or a mechanical workshop as it has remarkable effectiveness against oil and grease stains. In these cases, if the jet of water is not only hot, it is also better. For professional uses, we think of a car wash but also of cleaning large sheds. But the pressure washer also allows alternative methods, we believe of sandblasting. Do you need to unblock a pipe? With a pressure washer and the right accessory, you can do it.


How many bars

For domestic use, how many bars are enough? It depends on the type of dirt. For example, in the case of fresh mud and generic dirt, 120 bars are sufficient. If the clay is now dry, encrusted, there is mould, moss etc., then it is good that the bars are 160. If this dirt mentioned above must be removed by agricultural vehicles or otherwise intended for work, then at least 200 bars are needed.

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