Abstract: An improved radiant tube heater is disclosed utilizing a burner operating with an excess of either gas or air together with the remote injection of the required air or gas to match the excess and produce a staged combustion.

Abstract: An improved immersion tube heater means is disclosed for uniformly and reliably heating oils to a temperature below the oil's critical physical breakdown temperature so as to avoid damage to the oil and coating the tube with damaged oil byproducts.

Abstract: A dual burner bidirectional radiant tube heater is disclosed utilizing single throat eductors for both the supply of combustion air to the burners and for the exhaust of the products of combustion from the burners.

Abstract: An auxiliary flue is disclosed to vent contaminants from a regenerative burner furnace during secondary operations so as to avoid damage to the burners from such contaminants.

Abstract: A burner for use in a heat regeneration system for a combustion furnace. The burner includes a burner shell having two internal chambers, wherein the first chamber is disposed on the flame axis of the burner, and the second chamber surrounds the radial perimeter of the first chamber. A gas permeable, annular regenerative bed separates the first and second chambers such that gas flow between the first and second chambers must travel through the regenerative bed in a direction which is generally radial with respect to the flame axis. The burner has "flue" and "fire" modes of operation. Valving elements are included for supplying combustion air to the second chamber under pressure when the burner is in the fire mode, and for exhausting products of combustion (POC) from the second chamber when the burner is in the flue mode. In the disclosed embodiment, the burner valving elements are annular and integral with the burner body.