This adjustable gas orifice burner is called the “V” series since some of its features are adapted from a venturi syle nozzle. This design has good flow characteristics and the reduced pressure losses in the nozzle mean greater kinetic energies are transferred to the jet stream of gas. This, combined with higher aspect ratios on the gas annulus, enhance the stability and control of velocity resulting in excellent control of flame length and flame shape.
Since gas velocity requirements vary from furnace to furnace, nozzle size selection is very important. The following sections on Gas Firing, Flame Shape Control Factors Affecting Burner Capacity, and Burner Selection will be addressed for different capacity ranges.
Burner turndown normally encompasses either 2.5:1 or 3:1 gas flow operating ranges, and allows optimum burner operation. For operating conditions not covered, consult your Eclipse Sales Engineer.
The burner design entails a simple construction for ease of burner part serviceability or replacement. Construction materials for the gas burner are of carbon steel, ductile iron, and stainless steel. Items exposed to moderate heat are made of ductile iron, while items which are directly exposed to furnace radiation are made of stainless steel.
Special features include:
• Regernative furnace application
• “Sealed-in” firing for increased burner
efficiency
• Underport, overport, and sideport burner
firing
• Improved adjustable gas orifice for flame
shape control
• Gas to 5 psig (0.4 bar)
• Oil uses atomizing air or steam to 40 psig
(2.76 bars)
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