Method and flow control device for delivering fuel oil to a...

Details Method and flow control device for delivering fuel oil to a... Method and flow control device for delivering fuel oil to a...

F - Mech Eng,Light,Heat,Weapons

23

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F23D 11/46 (2006.01) F23D 11/00 (2006.01) F23D 11/10 (2006.01) F23D 11/24 (2006.01) F23D 11/36 (2006.01) F23K 5/22 (2006.01)

Patent

CA 2332673

A method for delivering fuel oil from a pressurized fuel oil source to an airblast atomizer subassembly on a low firing rate fuel oil burner includes providing a flow control device having a body defining a bore extending between and inlet end of the bore and an outlet end of the bore. The flow control device includes a rod disposed coaxially within the bore in a close fitting relationship. At least one of the bore and the rod is threaded (i.e., includes a groove extending along a helical path) to define a passageway extending along a circuitous, helical path intermediate the input and output ends of the bore through which the fuel oil must pass in flowing from the input end to the output end. The passageway has a size and shape adapted to achieve a desired rate of flow of the fuel oil to the airblast atomizer subassembly (e.g., less than 1.0 gallons per hour and typically less than 0.5 gallons per hour). The method proceeds by delivering the fuel oil through the passageway in the flow control device. One embodiment of the flow control device has a threaded bore. Another has a threaded rod. Yet another is adapted to attach directly to the atomizer subassembly, while still another has fittings enabling placement in a fuel oil line apart from the atomizer subassembly.

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