Recent Blogs
Disc Valve for Large Gas Pipes: Port Alignment, Gear Drive and Geometry Calculator
Explore a pinion-driven ported disc valve. Calculate geometric port overlap and an ideal covered-port pressure force using an illustrative four-port layout.
Counter-weighted Gas Holder Mechanism: How It Works, Parts, Formula and Calculator
Explore a water-sealed gas holder with two counterweights. Calculate the ideal static pressure balance and whether the entered bell mass needs counterweights or ballast.
Wet Gas Meter Mechanism: How the Rotating Drum Measures Gas Volume, Parts, Diagram and Uses Explained
Explore wet gas-meter drum speed and flow conversions. The water-level indicator is hypothetical and must not be used as a calibration correction.
Underfeed Stoker: Ideal Screw-volume and Heat Comparison
Explore screw feeding beneath a fuel bed. Compare ideal swept volume and heat using fixed density and heating-value assumptions; furnace performance is not predicted.
Siemens Electric Gas Furnace Mechanism: How the LMV Burner Controller and SQM Servos Work
How a Siemens electric gas furnace works — burner control, ignition sequencing, and modulation logic for industrial heating, with sizing math and real examples.
Petroleum Furnace: Declared Air-Flow Accounting
Petroleum furnaces burn oil to fire steam boilers and process heaters. Learn the burner physics, atomisation specs, and real refinery applications.
Petroleum Burner: Fuel-Rate Energy Accounting
Petroleum burner explained — how atomising oil burners work, key components, sizing formula, and real applications in marine boilers, kilns, and asphalt plants.
Ore Roasting Furnace: Multiple-Hearth Rabble Principle
Explore a multiple-hearth ore-roasting furnace and its rotating rabbles. Calculate feed and sulfur masses and an assumed maximum sulfur-dioxide equivalent.
Open-Top Electric Furnace: Ideal Aperture Radiation Calculator
Estimate ideal net radiation through an open furnace aperture from area, temperatures and effective emissivity. Compare this single term with entered bank power.
Oil-Burning Melting Furnace: Hiscox Item 701
Explore the casing, firebrick lining, oil burner and removable hopper in Hiscox item 701. Calculate clear section diameter from casing size and lining thickness.
Hot-water House Boiler: Heat-Rate Arithmetic and AFUE Limits | FIRGELLI
Compare heat-input and output scenarios with assumed constant efficiencies. Learn why AFUE is an annual measure and this calculator cannot determine boiler size or capacity.
Flame-Heated Incubator: Enclosure Heat-Loss Calculator | FIRGELLI
Explore a historical thermostat and damper arrangement and calculate enclosure heat transmission from area, resistance and temperature difference.
Gas Pressure Regulator: Droop Illustration | FIRGELLI
Explore a spring-loaded regulator and an assumed linear droop calculation. Compare gauge pressures while understanding the limits of the model.
Gas Furnace: Air Injector and Heat-Balance Calculator
See how an air jet draws fuel gas into a mixing tube and feeds a furnace. Compare useful heat, required fuel input and a heat-duty...
Gas Crucible Furnace: Heat-Input Calculator | FIRGELLI
Explore crucible-furnace heat flow and estimate average fuel input, propane use and charge throughput from stated thermal assumptions.
Garbage Furnace: Drying Hearth and Flow Calculator
Follow refuse over a curved drying hearth toward two grates. Compare nominal gas volume and the division of an entered undergrate air flow.
Fuel Gas Burner: Relative Orifice-flow Calculator | FIRGELLI
Compare gas-orifice diameter and pressure-drop ratios under equal gas conditions. Interpret relative firing rate, area and equivalent pressure without selecting burner settings.
Fire Extinguisher: Valve Animation and Charge-Mass Calculator
Explore the parts and valve action of a generic stored-pressure dry-chemical extinguisher. Calculate average mass rate and released or remaining mass from entered values.
Electric Thermostat: Bimetal Strip Animation and Deflection Calculator
Explore a bimetal thermostat contact and calculate free-strip deflection, end rotation and first-contact temperature rise from geometry and flexivity.
Electric Heater Mechanism Explained: Joule Heating, Parts, Uses, Formula and Worked Example
See a tubular immersion heater and estimate power for a fixed water batch from mass, temperature rise, heat-up time, delivery factor and average tank loss.
Electric Gas Lighter: Piezo Striker Animation and Pulse Calculator
Follow a push-button piezo lighter’s spring, latch and striker. Compare measured voltage, electrode gap and pulse energy without predicting ignition success.
Electric Furnace Mechanism Explained: How It Works, Parts, Diagram, and Power Sizing Calculator
Explore a resistance-heated crucible furnace and estimate pure-aluminum charge energy, melting heat and average power from mass, temperature rise, time and losses.
Dry Gas Meter Mechanism: How It Works, Diaphragm Parts, Tangent Linkage, and Uses Explained
See diaphragm chambers and changeover valves meter gas volume. Calculate raw volume, corrected reference volume and average flow from calibrated cycle counts.
Crude Petroleum Burners Mechanism: How Steam Atomizing Oil Burners Work, Parts and Uses
Explore a conceptual external-mix oil atomizer. Compare entered oil and steam speeds, their ratio and difference, and constant-speed travel over 10 ms.
Cowles Electric Furnace Mechanism Explained: Diagram, Parts, Operation and Carbothermic Smelting Uses
Explore the Cowles resistance furnace and calculate electrical power, equivalent bed resistance and average current density from voltage, current and round shank diameter.