Recent Blogs
Disc Valve for Large Gas Pipes
Disc valves shut off and throttle large gas pipelines using a rotating disc. Learn sizing, Cv, torque, and failure modes for transmission and utility service.
Throttle Valve
How a Throttle Valve regulates fluid flow in engines, hydraulics, and HVAC — working principle, sizing formula, worked example, and failure modes from FIRGELLI.
Pinch Valve
Pinch valves seal fluid by squeezing a flexible elastomer sleeve. Learn how they work, where mining and pharma teams use them, and how to size...
Gate Valve
Gate Valve explained — how the wedge seals, where it beats ball and globe valves, sizing math, and named applications across pipelines, refineries, and water...
Diaphragm Valve
How a Diaphragm Valve works, with sizing math, real applications in pharma and water treatment, and troubleshooting tips from FIRGELLI's engineering team.
Butterfly Valve
Butterfly valve explained — disc geometry, torque calculation, seat selection and sizing for water, HVAC, oil & gas, and process pipelines.
Rotary Valve
Rotary Valve explained — how the spinning port directs flow, sizing math, and real applications in 2-stroke engines, pneumatics, and pharma powder dosing.