Recent Blogs
Hydraulic Air Compressor: Static Head and Pressure Calculator | FIRGELLI
Learn the falling-water air-compression principle and compare static water head, gauge pressure, absolute pressure and ideal isothermal gas volume. Air delivery is not calculated.
Steam-driven Ventilating Fan Mechanism: How Guibal Colliery Fans Work, Parts, Diagram and Uses
Steam-driven ventilating fans cleared methane and bad air from deep coal mines. See how Guibal and Waddle fans worked, plus a worked sizing example.
Miner's Safety Lamp: Historical Gauze Component Map
Explore the historical components of a flame safety lamp and calculate ideal wire-gauze pitch, clear opening, open area and cylindrical surface area.
Box-wing Blower Mechanism: How It Works, Parts, Formula and Mining Ventilation Uses Explained
Explore the box-wing centrifugal blower: enclosed wheel passages, a central inlet and scroll outlet, with a calculator comparing shaft power at assumed efficiencies.
Water-jet Air Compressor: Ideal Head-to-Pressure Calculator
Convert a nonnegative difference between entered drop and recovery height into ideal water-column gauge pressure. Airflow and compressor efficiency are not calculated.