Mechanisms — valve travel

Recent Blogs

Valve Gear (form) diagram
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.
Single D Slide Valve diagram
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.
Joy’s Valve Gear — schematic of the mechanism.
Joy’s Valve Gear: Connected Animation and Valve-Travel Calculator
Follow Joy’s connecting-rod-driven valve gear through a complete crank cycle. Adjust guide inclination and compare piston position, valve displacement and valve travel.
Bremme Valve Gear diagram
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.