Actuators are mechanical devices that are used to open and close
valves, dampers and vents in all types of processes. They
convert energy - a burst of air, electricity, or a liquid - and
trigger a controlled reaction. Solenoid actuators are three-
dimensional coils or loops of wire that convert energy into
linear motion to trigger a pneumatic or hydraulic (fluid) valve.
In addition to use in furnaces, solenoid actuators are used in a
number of applications including electric bell assemblies,
automotive starter systems, industrial air hammers, and other
devices where a sudden burst of power is necessary. Blowers and
damper vents in home heating furnaces use actuators to open and
close them which allows hot air into the house and sends gases
outside. A signal is sent from the thermostat to the actuator
which energizes it and opens the damper. The actuator is de-
energized once the damper is open and remains idle until the
correct temperature has been reached. Upon reaching the
necessary temperature, the operation