Recent Blogs
Feeding Pulverized Fuel: Interactive Process Diagram | FIRGELLI
Follow grinding, classification, coarse return and primary-air transport. Compare entered velocity, air/fuel ratio, fineness and moisture alongside the animation.
Feed-Water Heater: Heat and Steam-Ratio Calculator | FIRGELLI
Compare ideal heat input, condensing-steam mass ratio and terminal temperature difference for a closed feed-water heater. Includes an animated tube cross-section.
Exhaust Steam Head: Baffle and Passage-Area Calculator | FIRGELLI
Explore the baffle, vent and drain in an exhaust steam head. Compare ideal inlet, outlet and annular passage areas without assuming a pressure-loss rating.
Exhaust Jet Condenser: Injection-Water Calculator | FIRGELLI
Calculate an ideal jet-condenser water balance from steam flow, enthalpy and water temperatures. Explore mixed discharge and saturation-pressure reference.
Excelsior Injector: Steam and Water Pressure Calculator | FIRGELLI
Follow an Excelsior injector valve sequence and compare static suction pressure, water vapour pressure and a specified delivery-pressure target.
Ejector Condenser Mechanism: How It Works, Parts, Diagram, and Uses Explained
Explore a multi-jet condenser cutaway and compare cooling-water flow, equivalent nozzle bore and mixed discharge under an assumed complete-condensation condition.
Edwards Air Pump Mechanism: How It Works, Parts, Diagram and Sizing Formula for Steam Condensers
See the Edwards pump’s solid conical bucket, inlet ports and head valves. Estimate bore-swept volume and compare factor-adjusted flow with demand.
Eclipse Return Tubular Marine Boiler Mechanism: How It Works, Parts, Diagram & Evaporation Formula
Trace the Eclipse boiler’s direct and return gas passes. Calculate steam mass flow and heat output from measured heating surface, evaporation and enthalpy rise.
Eccentric-rod Disengaging Device Explained: How It Works, Parts, Diagram & Uses in Steam Valve Gear
Explore Brown 186 manual eccentric-rod release with a moving hand lever, an illustrative lifting cam and a calculator for gab lift and valve-pin clearance.
Dow Steam Turbine Mechanism: How It Works, Parts, Diagram, Formula and Uses Explained
Explore the Dow turbine’s fixed and rotating grooved disks. Enter diameter, shaft speed and inspection radius to calculate surface speed and acceleration.
Double-Slide Piston Rotary Engine: Radial Slides and Ovoid Chambers
Explore two opposed radial slides in an ovoid rotary-engine casing. Calculate slide travel, guide engagement and static chamber volume for a selected ellipse.
Disengaging Device (modification 3) Mechanism Explained: Parts, Diagram, and How It Works
Explore a hand lever and link lifting an eccentric rod off its valve pin. Compare gab clearance, handle travel and ideal effort against an assumed...
Manual Eccentric-Rod Disengaging Device: Brown188 Gab Release
Explore Brown 188 manual gab release with its hand pivot behind the valve pin. Compare lift, notch clearance and handle travel using an illustrative circular...
Manual Eccentric-Rod Disengaging Device: Brown187 Gab Release
Explore a manual eccentric-rod gab release. Compare hand rotation, cam lift and pin clearance using an illustrative circular cam with the engine connection at rest.
Direct-acting Centrifugal Governor: How It Works, Parts, Formula & Uses Explained
Explore radially sliding governor weights, steel ribbons and a spring-loaded collar. Compare ideal collar lift at three speeds for the stated example geometry.
Dion Vehicle Boiler: Concentric Drums, Water Tubes and Grate-Area Comparison
Explore the Dion boiler’s concentric drums and inclined water tubes. Compare grate area for a steam demand using two measured grate-area evaporation rates.
Differential-Seat Safety Valve: Linked Heads, Pressure Areas and Spring-Force Comparison
Explore a differential-seat valve cutaway and compare projected pressure areas with spring loading. An educational mechanism model, not a safety-valve sizing tool.
Differential Governor Mechanism: How It Works, Parts, Diagram and Calculator for Steam Engines
Explore a weighted-rope differential governor. Compare drive and fan rim speeds, weight movement, ideal rope tensions and required shaft torques.
Diagonal Twin-screw Engine Mechanism: How It Works, Parts, Diagram and Marine Uses Explained
Watch crossed connecting rods drive two inclined-cylinder slider-crank trains. Calculate cylinder-axis projections and compare the space tradeoff as inclination changes.
De Laval Steam Turbine: How It Works, Nozzle Diagram, Parts, Formula & Uses Explained
Explore a single-stage De Laval impulse turbine and its velocity components. Compare ideal blade-speed ratio, utilization and optimum speed for an entered nozzle angle.
Davies' Disc Engine Mechanism Explained: How the Wobble Disc Rotary Steam Engine Works
Explore a nutating disc inside conical heads and a spherical case. Calculate rim-height range, projected diameter, crank orbit and cycle frequency.
Cross-head Slide Mechanism: How It Works, Parts, Diagram, and Side-Thrust Calculator
Explore a guided crosshead and calculate ideal side thrust, connecting-rod force and load per simultaneously loaded guide surface from axial force and rod angle.
Crank-shaft Governor Mechanism: How It Works, Parts, Diagram & Steam Engine Speed Control Explained
Explore a spring-balanced crank-shaft governor with a compound eccentric. Compare steady equilibrium, stop positions, weight forces, spring tensions and eccentric throw.
Crank-pin Lubricator Mechanism: How Centrifugal Big-End Oiling Works, Parts, and Diagram
Explore centrifugal crank-pin lubrication. Calculate ideal pressure difference and equivalent oil head between two radii from shaft speed and oil density.
Corrugated Expansion Coupling Mechanism: How Bellows Absorb Steam Pipe Thermal Expansion
Explore a corrugated bellows coupling and calculate axial pressure thrust from effective bellows diameter and gauge pressure. Includes equations and a worked example.