Pressure Washers

Pressure Washers Make Short Work Of Surface Dirt

Pressure washers can reasonably be said to have changed the face of heavy duty surface cleaning forever. The first commercial cleaning unit to make use of a high pressure jet of water for clearing a surface of dirt was introduced more than 60 years ago when, in 1950, Alfred Kärcher perfected and launched a working design. Since then, there have been huge advances in this powerful cleaning technology but the simple principle behind the operation of these innovative devices remains largely unchanged.

Typically, pressure washers employ some means of compressing water stored in a chamber and then forcing it through a rod-like structure with a narrow exit nozzle that is used to direct an extremely high pressure jet on to a surface that needs cleaning. The pressure of water alone, in most cases, is quite enough to dislodge most types of dirt and saves a great deal of time and energy when compared with purely manual scrubbing techniques.

The rod-like structure or lance, to use its correct name, allows the jets of pressure washers to be directed very precisely. This means that they can readily penetrate spaces that, quite likely, would be very difficult, if not impossible, to access using other cleaning tools.

Tool for Every Task

One of the most common domestic tasks for which these devices are regularly used is washing the family car. For a mud-caked RV, this offers the ideal solution, as the powerful jet is well able to wash away the thick mud and grime with all the ease of a hot knife cutting butter. Industrial strength pressure washers make it possible for large commercial vehicles such as lorries and bulk liquid tankers or even buses and railway rolling stock to be cleared of all surface dirt in a mere fraction of the time that would normally be required for this type of mammoth task.

At home the same device used to smarten up the much-loved 4x4 is just as capable of cleaning up the garden path, clearing junior’s artistic efforts from the brickwork or clearing oil stains from the garage floor.

As the tasks get tougher, pressure washers with certain extra features come to the rescue. For many of the heavy duty cleaning jobs such as factory floors and other workspaces, it is often enough to just use a machine that has a bit more pressure to call upon.

In the Kärcher range, there are units that can supply water jets at pressures ranging from between just 3 to 20 bar right up to an incredible 250 bar. In case you may have any doubts about their effectiveness, it may be worth mentioning that certain pressure washers can generate sufficient power in their water jet to actually lift the asphalt from a road surface when used without regard for the recommended precautions.

Models similar to those in domestic use are often employed in commercial car washes. These tend to be higher pressure models with a larger capacity and may even offer the means to introduce detergent directly into the high pressure stream – just the job for a full-house valet job that includes an engine shampoo.

The performance of pressure washers can often be even further improved by use of hot water rather than cold. Some cold water models may accept warm water feeds at temperatures of up to about 60°C but the purpose built hot-water models provide a means to heat the water internally, in lower powered models, to 80°C which is hot enough to clean most deeply-soiled surfaces and also to cause scalding so a little extra care may need to be taken.

This is far from being the limit for hot water pressure washers which, in the heavy duty models, can get up to around 155°C. This is made possible by heating the water under the higher pressure conditions prevailing in the compression chamber.

Mobile or Stationary

While some machines are meant to remain fairly stationary during use, other situations may call for mobile units and these will normally need larger capacities also. To cover a huge expanse of factory floor in a reasonable time will obviously require such a large capacity, mobile unit and, in the event that it may need to be used in an area without mains electricity a petrol-driven model would be the ideal choice.

Power and versatility are the hallmarks of quality pressure washers. The wide range of models and wider range of applications makes careful selection vital.

Cold Water High Pressure Cleaners For Power

Pioneered by Kärcher, cold water high pressure cleaners made first appeared in 1950. Since then, the company has gone on to become the industry leader in this field. Today, users may choose from a wide range of models that may be stationary or mobile. In the latter case one may choose form electrically driven and petrol or diesel driven models while some units have also been designed to deliver a high pressure jet of pre-heated water for use where the cleaning demands may be tougher.

The introduction of cold water high pressure cleaners actually revised the whole modern approach to cleaning a wide range of surfaces, particularly in the industrial arena where the depth and extent of soiling tends to be far greater than that likely to be found in the average home. Nevertheless smaller, entry-level units, based on the very same principle are now widely used on the domestic scene for such common tasks as cleaning the family car, washing down garden paths or brickwork and cleaning the garage floor.

A Flexible Force

There are many uses for cold water high pressure cleaners and no other cleaning procedure offers such a high degree of flexibility of use. One of the greatest advantages of using a jet of water under pressure to clean a surface is that it is able to penetrate into places that other cleaning machines simply can’t.

As there is no physical contact between the operator and the soiled surface, the spread of germs and any resulting risk of infection are also much reduced when using this type of machine. Despite operating at far higher pressures, cold water high pressure cleaners actually use less water than the average garden hose. This is because the far narrower nozzles employed actually add to the water pressure while, at the same time, lessening the actual flow rate and thus using far less water over the same period of time than a conventional hose with its much wider nozzle.

Much of these machines’ versatility lies in the wide array of pressures that are offered by the various models in our extensive Kärcher product range of cold water high pressure cleaners. These start at a substantial 120 bar and extend all the way up to a massive 250 bar – an incredible cleaning force that should cope in most situations. For those times when pressure alone may not be enough, some of the models provide for the introduction of detergent into the water jet.

One of the biggest single advantages of this approach to surface cleansing is the fact that it avoids the use of chemicals that could prove harmful to the operators and to the environment. Consequently, when using cold water high pressure cleaners, should detergents prove necessary, they should be both non-toxic and biodegradable.

Although primarily designed for cold water cleaning, these units are able to handle feed temperatures of up to 60°C should a little bit of extra cleaning power proves necessary. For higher temperatures, models with built-in heating facilities are available.

A Powerful Cleaning Tool for the Professionals Also

Increasingly, today, many companies are choosing to employ third party cleaning services. For any operator that is engaged in this type of work, cold water high pressure cleaners can prove to be a very sound investment that can not only save a lot of time but also eliminate the cost of expensive and often hazardous cleaning chemicals. Time saved then becomes time free to service more clients with a resulting improvement in income.

Suitable for almost any surface you can think of and over a wide range of pressures that in some of the models may be adjusted by means of a simple control built into the handle cold water high pressure cleaners offer their owners truly exceptional cleaning power, unequalled flexibility and great economy as well as being highly environmentally friendly.

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