Where is the orifice located on a gas furnace?
As for their location, the pilot orifice is located under the nut that is threaded into the pilot assembly at the main burner, visable center right in first picture.
What does a furnace orifice look like?
The orifice looks like a tiny brass cup. This is the orifice up close. You can see how tiny the hole in the center is.
Where is the pilot orifice located?
The pilot orifice is located at the end of the pilot supply line. This is the orifice up close. Remove the burner from the water heater. Turn the burner upside down and remove.
What is an orifice on a furnace?
The gas orifice dispenses fuel into the combustion or burner tube through a small, high precision hole. The orifice delivers just the right amount of fuel to mix with the correct amount of air, to create just the right flame for the job in your appliance.
How do I clean my furnace orifice?
Soak the orifice in alcohol. Use an air hose with a high pressure nozzle to blow it out. As a last resort, use a tooth pick or the bristles of a tooth brush to clean it.
What is the purpose of orifice?
An orifice plate is a device used for measuring flow rate, for reducing pressure or for restricting flow (in the latter two cases it is often called a restriction plate ).
What size orifice is needed for natural gas?
Propane and Natural Gas Are Supplied at Different Pressures Cooktop burners typically supply about 40,000 BTUs per hour. A propane stove orifice size is about 0.082 inches (drill size 45), but the valve on a similar stove that uses natural gas needs an orifice that is almost 0.125 inches (drill size 35).
Is a propane orifice bigger than a natural gas orifice?
Natural gas orifices are larger than propane, to allow extra fuel to flow through at lower pressure. Propane orifices are smaller, to account for the higher pressure and increased energy output.
Can you drill out a propane orifice natural gas?
Converting from LP to natural gas safely and correctly involves more than might be apparent to the typical DIYer. Frankly, it’s folly to drill out orifices. If you can get the correct orifice, don’t do it.
What does the number on a gas orifice mean?
Thus a #56 size orifice is an orifice fitting that has been drilled with a #56 drill bit. The larger the number, the smaller the drill bit. (Orifice hole size will be larger for natural gas supply models than propane because of the lower natural gas operating pressure).
What is the definition of an orifice?
: an opening (such as a vent, mouth, or hole) through which something may pass an anatomical orifice the nozzle orifice the cone built up from the cinders around the eruption orifice— R. H. Mohlenbrock.
Can I use LPG instead of natural gas?
than the normal working pressure of a natural gas appliance. Any attempt to use LPG through a unconverted natural gas appliance could result in serious injury or death. Some gas appliances are not designed or certified for use on LPG and cannot be converted to LPG.
What is orifice size?
The orifice size is the actual hole diameter in the orifice fitting. Divide the flow of the liquid by the velocity of the liquid to determine the area of the orifice in square feet. In the above example, you would divide 8 by 2. The total area of the orifice would be 4 square feet.
What is a natural gas orifice?
Orifices are responsible for the amount of gas that flows into the burners. Orifices are brass fittings that screw into (spud) or onto (hood) valves. These orifices will have various hole sizes as they determine the gas type either Propane or Natural Gas.
What pressure is natural gas?
A common operating pressure for natural gas appliances is around 7 inches of water column (WC) or re-stating this in equivalent measure, that’s 14.9 millibars or 1743 Pascals or Pa, or about 0.25 psi (pounds per square inch) or about 4 ounces of pressure per square inch. See NATURAL GAS APPLIANCE PRESSURES for details.