Tubes {shunt, machine}| allow fluid to flow between two cavities or tubes.
Tubes {syringe}| can have a fitted piston to pull liquid by suction or push liquid by pressure.
Tubes can trap vapor that can slow fluid flow {vapor lock}|, when temperature makes fuel vapor pressure equal to liquid gravity or vacuum pressure.
Cylinders with a narrow part {Herschel Venturi tube} {Venturi tube, fluid}| can attach to a large tube in which fluid flows, to measure flow rate.
Tubes can have devices {valve, tube}| that prevent flow in one direction or flow in both directions.
A hollow ball can float on water surface and an attached rod opens and closes a fluid valve {ball cock}| {float cup}.
Valves {ball valve}| can have a ball that seals tube opening.
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Date Modified: 2022.0225