A pilot valve in a hydraulic system acts as a pressure-control valve allowing hydraulic fluid to pass through to another valve using either a sliding or a poppet design. If there is too much pressure on hydraulic liquid, the pilot valve will open up and let liquid pass through to diminish the pressure.Know More
Hydraulic systems make use of incompressible liquid in different-sized pistons. The systems allow for force that is exerted on a small piston to be magnified in the large piston. When force is applied to the small piston, Pascal's law states that pressure must be equal throughout the entire liquid, so pressure is built up in the larger piston which creates a magnified force because of the larger area of the chamber.
The hydraulic liquid passes through a series of valves in between the two pistons. The pilot-valve typically has a spring or electronic press on a stopper that will only open up at a certain pressure. If the pressure of the liquid exceeds the allowed pressure on the stopper, the valve will open up and allow liquid to run through it in one direction to equalize the pressure. The entire hydraulic system depends on the pilot valve, if the pilot valve opens too early or too late, then the entire system does not work properly.Learn more about Heating & Cooling
In contrast with older gas furnaces, an oil burning furnace does not use a pilot light. An oil furnace typically uses an electronic ignition switch system. to power up.Full Answer >
If the heater's sensors detect a safe atmosphere, any match or lighter can be used to ignite the heater's pilot light. If the atmosphere is not safe or the pilot is clogged, it may not light without cleaning or ventilation.Full Answer >
A boiler may not work because it doesn't have power or the water level may be too low. Other problems that may cause a boiler not to work are a malfunction of the pilot or electronic burner or a malfunction in the thermostat.Full Answer >
Generally speaking, thermostats work by using a mercury switch that is in contact with a thermometer wire to trigger a temperature-adjustment lever in response to the expansion or contraction of the wires as they are heated or cooled. The expansion and contraction of these wires triggers switch relays that control heating and cooling by triggering either a circulation fan and heater or air conditioner.Full Answer >