Recent Blogs
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.
Single Eccentric Reversing Gear: How It Works, Diagram, Parts, Formula and Uses Explained
Single Eccentric Reversing Gear explained — how Stephenson-era engineers reversed steam locomotives with one eccentric, slip-link, and gab hook. Diagrams, math, examples.
Stephenson Valve Gear Explained: How It Works, Parts, Cutoff Formula and Uses in Steam Locomotives
Stephenson valve gear explained — how the link motion controls steam admission, cutoff, and reverse on locomotives, with worked sizing example and tradeoffs.
Slide Valve Mechanism Explained: How It Works, Diagram, Parts, Port Timing & Steam Engine Uses
Explore D slide-valve admission and exhaust connections, and calculate nominal full-port travel, eccentric throw and linear advance from selected port and lap dimensions.
Slide Valve: Port-opening and Lap Calculator
Compare valve half-travel, steam lap and port width to calculate maximum edge exposure. Entered lead is reported separately; valve timing and cut-off are not calculated.
Steam Engine Valve Chest Mechanism Explained: D-Valve Parts, Lap, Lead and Port Opening Diagram
Steam engine valve chest explained — how the slide valve admits and exhausts steam, port sizing, lap and lead, and worked examples from heritage marine...
Single Eccentric Variable Valve Throw Mechanism: How It Works, Parts, and Diagram
Single Eccentric Variable Valve Throw explained — how shifting one eccentric on a steam engine alters valve travel, cutoff, and power across operating range.
Single Eccentric Valve Gear Mechanism: How It Works, Diagram, Parts, Timing & Uses Explained
Single Eccentric Valve Gear explained — how it drives the slide valve on stationary steam engines, with formulas, worked example, and design tradeoffs.
Single D Slide Valve Mechanism: How It Works, Parts, Lap and Lead Diagram
See how a D-slide valve alternates admission and exhaust through three passages. Compare selected eccentric radius, throw and opening-span dimensions.
Meyer Cut-off Valve: Right-and-Left Screw Adjustment
Explore the Meyer riding cut-off plates and calculate their symmetric spacing change from opposite-hand screw lead and adjustment turns.
Marshall Valve Gear: Suspension-Link Topology and Eccentric Motion
Explore Marshall radial valve gear and its suspension link. Calculate the driving eccentric center displacement, speed and acceleration; valve events are excluded.
Bremme Valve Gear Mechanism Explained: Parts, How It Works, Formula, and Marine Steam Engine Uses
Explore Bremme’s suspension-link valve gear. Adjust the support and compare valve travel, opening beyond lap and speed through one shaft revolution.
Allan Straight-link Valve Gear Explained: How It Works, Parts, Diagram and Uses
Explore Allan straight-link valve gear and its opposing reversing adjustments. Compare input shares while distinguishing them from physical valve lead and steam cutoff.