Recent Blogs
Sellers' Restarting Injector
How the Sellers' Restarting Injector feeds water into a steam boiler, why it self-restarts after a break, and how heritage railways still use it today.
Nathan Injector
Nathan Injector explained — how this steam-driven boiler feedwater pump works, real lift and delivery figures, and named locomotive applications.
Sellers' Self-adjusting Injector
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.
Metropolitan Injector
How the Metropolitan Injector lifts and forces feedwater into a locomotive boiler against 200 psig — with worked delivery numbers, troubleshooting, and design tradeoffs.
Little Giant Locomotive Injector
Little Giant locomotive injector explained — how the Gresham & Craven feedwater injector works, sizing formula, worked example for heritage steam locos.
Leader Injector
How a Leader Injector feeds water into a steam boiler against its own pressure — design rules, sizing maths, and heritage locomotive applications.
Hancock Inspirator
Hancock Inspirator explained — how this steam-driven boiler feedwater injector works, sizing math, locomotive use, and troubleshooting lift and delivery faults.
Excelsior Injector
How the Excelsior Injector feeds water into a steam locomotive boiler against its own pressure — physics, sizing formula, worked example, and failure modes.
Brownley Injector
The Brownley Injector forces feedwater into a steam boiler against its own pressure using a steam jet — used on locomotives, traction engines, and stationary...