| DEWALT Pressure Washer DP3900 Heavy Duty Gas Powered Pressure Washer with 3750 PSI 13HP Honda GX |
| DEWALT Pressure Washer DP3750 Heavy Duty Gas Pressure Washer with 3750 PSI Commercial Grade |
| DEWALT Pressure Washer DP3100 Heavy Duty Pressure Washer Machine with a PSI of 3100 & 2.8 GPM 6.5 Gross HP Honda GX200 |
| DEWALT Pressure Washer DP3400 Heavy Duty Gas Powered Pressure Washer with 3400 PSI 9.0 HP Honda GX |
| A pressure washer is a mechanical device that uses high-pressure water to remove mold, grime, dust mud and dirt from surfaces and objects such as buildings, vehicles and concrete road surfaces. Equipment can be rented or bought that produces pressures of 4000 PSI (around 276 bar) or more. The most basic pressure washer consists of: a motor which directly drives a water pump high pressure hose trigger gun Just like a garden hose nozzle is used to increase the outflowing pressure of the liquid, this machine adds its own power to force high pressure, when a regular nozzle would slow the flow, due to its restricting nature. Note that the pump does not draw more water from the pipe to which the washer is connected than that source can provide; therefore, the water supply must be adequate for a given machine to be connected to it: its flow must be equal, and should be superior, to that of the washer, so that the pump never be starved (which can damage it, see Cavitation). Several different types of nozzles are available, each useful for a particular application. Some nozzles cause the water jet to be ejected in a triangular plane, while others emit a pencil-thin jet of water, which spirals around rapidly. Most nozzles attach directly to the trigger gun. Some pressure washers, in combination with a particular nozzle, allow detergent to be introduced into the water stream, assisting in the cleaning process. Two types of chemical injectors are available, a low-pressure injector and a high pressure injector. Pressure washers are dangerous tools, and should be operated with due regard to safety instructions. The water pressure near the nozzle is powerful enough to strip flesh from bone. Objects in the water supply can be ejected from the nozzle at great velocities. The cleaning process can propel objects from the surface being cleaned, also at great velocities. Pressure washers have a tendency to break up asphalt if aimed directly at it, due to high pressure water entering cracks and voids in the surface. Most readily available consumer units (commonly found either online or at hardware stores) are electric or gas powered. The electric ones plug into a normal outlet, and use/produce cold water. Some models can generate hot water, which can be ideal for loosening and removing oil and grease In its extreme high pressure form it is used in many industrial cleaning applications requiring surface layers removed from some materials as well as dust free cutting of some metals and concrete. High pressure water at medium pressures with the aid of special chemicals aids in the removal of graffiti. This process (especially when the water is hot) is used as a quick rinser of the softened graffiti. Sometimes people use a pressurized mixture of air/sand or water/sand to blast off the surface of the vandalized area thus etching the surface making it extremely difficult for anyone to ever use high pressure cleaning as a follow up process. Sandblasting when used in graffiti removals often overcleans a surface and is capable of leaving a permanent scar on the building surface. Compare to sandblasting Pressure Washer BUYING GUIDE Pressure washer are available for all levels of use, from the weekend handyperson to heavy-duty commercial applications. Before you purchase, decide: What are you planning to clean? Grills, outdoor furniture, decks, cars, houses, driveways and dog kennels are all candidates for pressure washing. However, each does not share the same cleaning requirements. Cold or hot? Cold water pressure washers are less expensive, but not as effective for cleaning extremely dirty or greasy spots. How often will you use the pressure washer? An occasional weekend cleanup does not require the long-term durability of a regular user. Are mobility and portability important? Where will you be using the pressure washer? Gas-powered pressure washers are more portable but must be used outside. If you’ll be using the washer indoors or in an unventilated area, use an electric washer. Gas-powered units can produce carbon monoxide in lethal doses. Is time a factor? A heavy-duty pressure washer cuts some cleaning times in half. Do you have adequate storage space? A heavy-duty pressure washer requires more space than a compact unit. Speaking the Language - Some Definitions for Comparison Shopping An electric pressure washer is the only choice for indoor or unventilated use. Pounds Per Square Inch (psi) is the measurement of water pressure. The greater the psi, the better the cleaning efficiency. Gallons Per Minute (GPM) refers to the water flow rate. Look for a combination of psi and GPM to deliver cleaning power. High pressure with little water flow is not effective. Cleaning Unit (CU or UCE) is the water pressure multiplied by the water flow. A higher number means more power. Gasoline engines are measured in horsepower (HP). Electric motors are measured in amperage (amps). More HP or amps means more power. Pressure washers are available in a choice of two pump drive methods: direct drive and belt-driven. Heavy-duty belt-driven pumps offer more durability and efficiency. The core of any pressure cleaning system is the high-pressure pump. Some pressure washers use plunger type pumps because of their high-pressure capability and compactness. More plungers result in smoother flow. The actual cleaning is done by the nozzle or tip of the washer. The spray angle of the nozzle is adjustable to fit the cleaning need. The wider the spray, or fan, the lower its ability to cut through dirt. A zero-degree nozzle provides intense power. Fan angles of 15 to 25 degrees cover larger areas, combining stripping and washing power. Fans of 40 degrees or more are generally used for simple washing. Rotating nozzles are used for some cleaning applications Depending on what you’re cleaning, each application has its own specific procedure. Here are some general things to remember: Always use the right nozzle. Using a nozzle that concentrates too much power can harm some surfaces, especially wood. Use the chemical recommended by the manufacturer. Most manufacturers have detergents and waxes approved for use in their equipment. Different formulas are available for houses, decks, degreasing, and car washing/waxing. Cleaning a house is best done from ground level, rather than on a ladder. Use accessories such as spray arm extensions and brushes for this type of project. Cleaning results vary based on: Whether or not you use detergent. How far you are from the surface being cleaned. How high the water pressure is. How wide you set the spray angle. Pressure washers are equipped with safety features designed to reduce pressure buildup. Unloaders and thermal relief valves prevent heat and water pressure from reaching dangerous levels. An oil-level indicator ensures that the washer stays properly lubricated. |
| DEWALT Power Tools Online |
| Sponsored Links For Dewalt Pressure Washers |
| Sponsored Links For Dewalt Pressure Washers |