Recent Blogs
Sellers' Restarting Injector: How It Works, Parts, and Locomotive Feedwater Uses Explained
Explore the fixed tubes and concentric overflow checks in the Sellers restarting injector. Compare throat areas and a selected static delivery-pressure threshold.
Steam Pump Mechanism: How Direct-Acting Duplex Pumps Work, Parts, Formula & Uses
How a Steam Pump works, with formulas, a worked example sizing a duplex feedwater pump for a textile mill boiler, and real-world applications.
Return Steam Trap: Historical Principle and Float-Trap Comparison
Compare the Blessing-pattern return trap with a float-trap level illustration. Adjust display positions and ripple speed; the tool does not calculate trap capacity.
Pressure-Reducing Valve: Ideal Static Force Ledger
Pressure Reducing Valve explained — how it works, sizing formula, worked steam example, troubleshooting, and real applications in steam plant and process industries.
Eberman Injector Mechanism: How the Steam Lifting Injector Works, Parts, and Cone Geometry
Explore the Eberman injector’s sliding combining tube and overflow check. Calculate ideal steam-and-water mass flow and feedwater heating with an animated cutaway.
Standard Injector Mechanism Explained: How It Works, Parts, Diagram & Calculator
Standard injector explained — how a steam-driven feedwater injector works, sizing formula, worked example for heritage boilers, and troubleshooting failures.
Spring Steam Trap Mechanism: How It Works, Parts, Diagram and Sizing Calculator
How a Spring Steam Trap works in heritage steam plant — balanced-pressure thermostatic operation, sizing formula, worked example, and failure diagnostics.
Sellers' Self-adjusting Injector Mechanism: How It Works, Parts, Diagram, and Uses Explained
Sellers' self-adjusting injector explained — steam-driven boiler feedwater pump that auto-recovers from breaks in flow. Used on 19th-century locomotives and mill engines.
Penberthy Injector: Historic Automatic Flow Path
Explore the historic Penberthy automatic injector. Follow steam admission, suction, combining, overflow and delivery through an interactive passage diagram.
Peerless Automatic Injector: Historic Flow Path
Explore the Peerless automatic injector’s lifting and forcing sections. Follow steam admission, water entrainment, combining and delivery in a staged cutaway.
Park Injector: Hiscox Double-Tube Control Sequence
Explore the Park injector’s tandem lift and force tubes, separate handle commands and automatic overflow check in an interactive component-state diagram.
Moran Flexible Steam Joint: Articulation Geometry
Explore Moran's globular flexible joint and calculate endpoint lateral offset, axial setback, arc travel and displacement from arm length and articulation angle.
Metropolitan Injector: Components and Static-Head Comparison
Explore the Metropolitan injector components and compare entered boiler and delivery pressures with the hydrostatic head associated with a suction lift.
Leader Injector: Historic Double-Tube Sequence
How the historic Leader Injector uses a three-stage hand-lever sequence to control its lifting nozzle, force valve, overflow and double-tube paths.
Globe Valve: Liquid Cv Calculator and Flow Path | FIRGELLI
Calculate simplified liquid Cv demand, rated-capacity utilization, Cv margin and hydraulic power loss. Explore a globe valve’s plug-and-seat motion.
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.
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.
Centrifugal Exhaust Head Mechanism: How It Works, Parts, Diagram and Calculator
See a fixed tangential-entry exhaust head separate liquid into a drain. Calculate liquid carryover and total outlet flow using an entered removal percentage.
Bundy Steam Trap: Weighted Bowl Mechanism and Batch-Cycle Calculator
Explore the historical Bundy weighted-bowl return trap, see its operating sequence, and estimate cycle time from batch volume and filling/discharge rates.