A valve in the steam-pipe of a boiler for controlling the flow of steam to any apparatus, more particularly such a valve placed in the eduction-pipe of a steam-engine. (noun)
The Century Dictionary (Public Domain)
Use "throttle-valve" in a sentence
"As the top of the bellows _cc_ rises, it lifts up the throttle-valve _d_ (regulated by the wire _m_) which prevents the ingress of any more compressed air by _bb_."
"The engine-driver shut his throttle-valve with a jerk."
"We have no boiler, no feed pump, no stuffing-boxes to attend to -- no water-gauges, pressure-gauges, safety-valve, or throttle-valve to be looked after; the governor is of a very simple construction; and the slide-valves may be removed and replaced in a few minutes."