It is admitted to the engine by a valve similar to the throttle valve on an engine.
The engine speed may always be maintained by the throttle under a constant varying load, by adjusting the throttle valve.
What should be done in case the throttle valve stem became disconnected while the valve is closed?
It is the most perfect form of throttle valve, as it causes the gases to open directly into the center of the outgoing pipe.
Instantly Knight pulled the throttle valve open, and the locomotive started forward with a jerk.
With great27 presence of mind he opened the throttle valve an instant, and putting on all steam drove his engine forward.
Stay close to the throttle valve and watch the governor closely.
Steam dome changed from rear of boiler forward to a part over what was called the "man-hole," and throttle valve placed therein.
The engine is regulated by an ordinary Porter governor actuating the throttle valve, O.
This method involves a total loss of part of the head at the sluice or throttle valve.