Valve Collection

Illustration of triode valve

Person's hands adjusting valve on oxygen tank
Adjusting, Adult, Caucasian Appearance, Close-Up, Healthcare and Medicine, Human Hand, Medical Oxygen Equipment, Men, One Person, Oxygen Tank, Part Of, Pen and Ink, Valve, Watercolour Painting

Human heart and chest, illustration
Human heart with vessels, bronchial tree and cut rib cage. On white background

Worker Turning a Large Valve

Man Working at an Oil Refinery

Cross section of human heart and, bottom left, coronary system with aorta, coronary arteries, coronary vein and blood vessels

Gate valve, red wheel handle

Unlock the bleed valve on a radiator, container underneath radiator

Illustration of shut valve stopping backward flow of blood

Illustration of open valve with arrow showing direction of blood flow

Cartoon of human ileum represented as twisted pipes and valves with food passing through digestive system

Illustration of the workings of an engine

Hoover Tunes In
circa 1928: Herbert Hoover (1874 - 1964), Republican Party candidate for the Presidency of the United States of America, listening to a one valve radio set

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