Thermopak
Preferred Utilities Manufacturing Corp. developed the Thermopak line of burners to handle any fuel oil grade with rugged reliability. Thermopak burners are built with Preferred's trademark quality craftsmanship, providing perhaps the longest burner life spans in the world.
Key Features
All Thermopak burners are forced draft, heavy cast construction, and will deliver a consistently high efficiency with a significantly lower electrical consumption. Burner selection is dictated by the type of fuel oil to be fired with the essential differences being in the oil pumping, preparation, and metering systems.
Integral primary and secondary pumps
Slow speed pumps are completely submerged in a reservoir of heated oil. Positive burner restart is assured even after long periods of shut down.
"Voluvalve" oil metering system
The Voluvalve delivers a linear flow of precisely metered oil to the burner atomizer throughout the entire firing range. The system automatically compensates for variations in oil temperature, viscosity, and pressure. "Voluvalve" oil metering combined with "Vortex" combustion air control produces a consistently efficient fuel/air ratio, reduced excess air firing, and low flue gas O2.
Firing rate limiting
Maximum fuel input is actually restricted to the safe and efficient design rating of the burner and boiler. "Voluvalve" metering accuracy permits burner selection in increments of 5 gph.
Firing rate dial
This provides at-a-glance indication of fuel input. It also permits effective boiler base loading during heavy loads and accurate, anti-short cycling adjustments during light loads.
Multistage oil atomization system
Thermopak burners use three stages of atomization. Oil is first sent through a pressure tip. It is then jettisoned out onto a high-speed rotating distributor head where it is shattered into equal-sized droplets. The final stage uses high velocity annular air to blast a controlled volume of high static pressure air directly into the oil. Even the heaviest fuel oil is reduced to microscopic particles without the use of power-consuming, maintenance-prone air compressors.
Self-cleaning, clog-free atomizer
The atomizer is large ported and is cooled and purged of any oil residue after each firing cycle.
Self-cleaning igniter
A premix type gas/electric pilot burner produces a hotter, more stable flame while using only 1/2 cubic feet of natural gas per burner light-off. For maximum reliability, it is air-jet cooled and cleaned during the entire firing cycle.
Safe and rugged
Thermopak burners feature a heavy cast iron, multi-ported, circular firing ring. For added protection during oil firing, the ring is imbedded in refractory and kept clean and cool by a barrier of air.
Fuel changeover
Alternate fuel firing requires the mere positioning of an electric switch. Automatic changeover is available when required. Content