![]() ![]() LIGHT-DUTY pressure washers in the 1,300 to 1,700 PSI range are great for cleaning patio furniture, lawn equipment, stairs, and vehicles such as automobiles and small SUV’s. Wide range of cleaning projects requiring medium to heavy-duty power Ultimate portability – no need to locate power source or manage extension cordsīest for light to medium-sized cleaning projects Low maintenance – no need to add fuel or oil The engine of a powered pressure washer, like other gas powered equipment, does however require regular maintenance to keep it in proper working order. Gas pressure washers are also great if you are working in areas where an electrical outlet is not available. In contrast, gas engine powered pressure washers deliver higher pressure than electric powered units making them ideal for medium to heavy-duty cleaning projects. Electric pressure washers are also relatively maintenance free and don’t require oil changes or gas fill ups. Electric pressure washers are more compact and lighter in weight than their gasoline powered counterparts, and are ideal for small to medium sized residential cleaning projects. SELECTING THE RIGHT PRESSURE WASHER Broadly speaking there are two types of pressure washers designed for residential use - electric and gas powered. The higher the CC, the larger the engine and the more power it will generate. The combined number is a good overall indicator of relative cleaning effectiveness, with higher being better.ĬC: Cubic Centimeters, is a common measurement of gas engine size. Higher GPM typically means more effective cleaning.ĬU: Cleaning Units, is calculated by multiplying PSI x GPM. GPM: Gallons Per Minute, refers to the volume of water that the pressure washer uses when the spray gun is engaged. The higher the PSI, the more pressure that is being generated. PSI: Pounds Per Square Inch, is a measure of the water pressure generated by the pump. The following is a glossary of the most common terms and their definitions. Δ p = 22.5 ( m V ) 0.When shopping for a pressure washer you may come across some unfamiliar terms. Overpressure in an enclosed space is determined using "Weibull's formula": Heavily built concrete buildings are severely damaged or demolishedĬalculation for an enclosed space.Reinforced concrete buildings severely damaged or demolishedĢ0 pounds per square inch (140 kPa 1.4 bar).Injuries are universal, fatalities are widespreadġ0 pounds per square inch (69 kPa 0.69 bar).Most buildings collapse except concrete buildings.Serious injuries are common, fatalities may occurĥ pounds per square inch (34 kPa 0.34 bar).People injured by flying glass and debrisģ pounds per square inch (21 kPa 0.21 bar).Moderate damage to houses (windows and doors blown out and severe damage to roofs).Overpressureġ pound per square inch (6.9 kPa 0.069 bar)Ģ pounds per square inch (14 kPa 0.14 bar) Īn EOD suit worn by bomb disposal experts can protect against the effects of BOP. Exposure to BOP shock waves alone results in injury predominantly to the hollow organ systems such as auditory, respiratory, and gastrointestinal systems. The shock wave may be caused by sonic boom or by explosion, and the resulting overpressure receives particular attention when measuring the effects of nuclear weapons or thermobaric bombs.Īccording to an article in the journal Toxicological Sciences,īlast overpressure (BOP), also known as high energy impulse noise, is a damaging outcome of explosive detonations and firing of weapons. Overpressure (or blast overpressure) is the pressure caused by a shock wave over and above normal atmospheric pressure. For other uses, see Overpressure (disambiguation). This article is about shock waves in the atmosphere. ![]()
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