F23L SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ( firebridges with means for feeding air or steam F23M3/04; baffles or shields with air supply passages F23M9/04); VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS ; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
Introduced: September 1968
Description
F23L encompasses equipment and systems for managing air supply and draught in combustion apparatus, including specialized valves, dampers, and draught-inducing devices. It covers delivery mechanisms for air and non-combustible fluids to furnaces, boilers, and similar combustion systems, as well as physical components like chimney tops and flue terminals that regulate gas flow and prevent downdrafts. This classification excludes fuel supply systems (covered elsewhere in F23) and focuses specifically on the oxidant/air side of combustion control and ventilation management.
Title
Titles differ between systems:
IPC: SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
CPC: SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ( firebridges with means for feeding air or steam F23M3/04; baffles or shields with air supply passages F23M9/04); VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS ; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
Full Title
Full titles differ between systems:
SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ( firebridges with means for feeding air or steam F23M3/04; baffles or shields with air supply passages F23M9/04); VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS ; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
Of 12 combined children, 10 exist in both systems.
2 codes are CPC-only extensions.
Note: 2 CPC extensions are marked as secondary classification only.
2 shared codes have differing titles between IPC and CPC.
Child Classifications
Navigate with arrow keys, Enter to open
- F23L 1/00 Passages or apertures for delivering primary air for combustion (baffles or deflectors in air inlets F23M9/02) IPC+CPC Available in IPC and CPC
- F23L 13/00 Construction of valves or dampers for controlling air supply or draught IPC+CPC Available in IPC and CPC
- F23L 17/00 Inducing draught; Tops for chimneys or ventilating shafts; Terminals for flues +1 CPC IPC+CPC Available in IPC and CPC
- F23L 2700/00 Installations for increasing draught in chimneys; Specific draught control devices for locomotives 2nd only +2 CPC CPC only CPC only
- F23L 2900/00 Special arrangements for supplying or treating air or oxidant for combustion; Injecting inert gas, water or steam into the combustion chamber 2nd only +17 CPC CPC only CPC only
- F23L 7/00 Supplying non-combustible liquids or gases, other than air, to the fire, e.g. oxygen, steam +2 CPC IPC+CPC Available in IPC and CPC
- F23L 9/00 Passages or apertures for delivering secondary air for completing combustion of fuel (baffles or deflectors in air inlets F23M9/02) IPC+CPC Available in IPC and CPC
- F23L 99/00 Subject matter not provided for in other groups of this subclass since 2006 IPC+CPC Available in IPC and CPC