Water pressure washers are perhaps the most powerful cleaning machines available today. If you conduct a search on the internet, you may come across several varieties of commercial and industrial pressure washer machines, such as cold water, hot water, or steam pressure cleaning machines. Some of the classifications are easy to understand, while others may be a bit more difficult.

The first thing that needs to be understood about these machines is how they work.

How do Pressure Washers Work?

Pressure washing systems pump water onto hard and semi hard surfaces to wash away the dirt, dust, and other impurities present on the surface. One of the most important aspect of these machines is the pressure level, which determines the overall power of the system. Pressure is created by a pump that ejects water through a nozzle on a trigger gun.

The pump is usually powered either by an electric motor or by a propane or gasoline engine. For indoor cleaning jobs, an electric pressure washer is preferred, as it generates no exhaust or toxic fumes. For outdoor cleaning applications, propane or gas pressure washers are generally recommended, as they do not require use near an electrical outlet. However, if used indoors, a gas pressure washer requires proper ventilation due to its production of exhaust.

The following are some of the vital specifications of pressure cleaning machines.

Pressure Level

Pressure level is expressed in pounds per square inch (psi). This indicates the overall power exerted by the machine. The output pressure level of commercial Pressure washers and industrial pressure washers usually varies from 500 psi to 8000 psi. Higher pressure levels are suitable for more demanding applications.

Flow Rate

Flow rate is another important specification of water pressure washers. It specifies the amount of water being emitted from the machine, measured in gallons per minute (gpm). The flow rate varies from 0.5 gpm to 8 gpm.

A higher flow rate normally indicates a higher power. It also indicates increased use of water. A low flow rate is preferred for many cleaning jobs where water waste and drainage must be considered, especially auto detailing. In addition, if water is not abundantly available and the place does not have sufficient drainage facilities, cleaning professionals prefer a pressure washer machine with a low flow rate.

Temperature

Pressure washer systems can provide an output temperature of up to 330 degrees Fahrenheit. These machines are placed into three categories, based on the output temperature: cold water, hot water, and steam pressure cleaning machines.

Cold water machines provide water at inlet temperatures. Hot water devices can provide an output temperature of 210°F, while steam pressure washer machines can provide an output temperature of 330°F.

Steam pressure cleaners provide the greatest cleaning power by dissolving the most stubborn stains and residues; but the high temperature makes them unsuitable for use on heat-sensitive surfaces. The latest models of pressure washer machines offer all three types of output in a single machine. These are called tri-mode systems, enabling operators to reap the benefits of all three temperature options for varying applications.

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