A pressure washer is a high-pressure mechanical sprayer used to remove loose
paint, mold, grime, dust, mud, and dirt from surfaces and objects such as buildings,
vehicles and concrete surfaces. The volume of a pressure washer is expressed
in gallons or litres per minute, often designed into the pump and not variable.
The pressure, expressed in pounds per square inch, pascals, or bar (deprecated
but in common usage), is designed into the pump but can be varied by adjusting
the unloader valve. Machines that produce pressures from 750 to 30,000
psi (5 to 200 MPa) or more are available.
The basic pressure washer consists of:
A motor, such as electric, internal combustion, pneumatic or hydraulic, that
drives a high-pressure water pump
A high-pressure hose
Trigger gun-style
switch |
