.~ With control fluid connection at desired liquid level
DEFINITION
Classification: 137/393
(under subclass 386) Apparatus wherein the level to be controlled is in a pressure tank, as a boiler, and a separate control chamber is provided to control a liquid inflow or outflow line of the tank. The control chamber is provided with a connection to the tank at the desired liquid level so that when the liquid is above this level the chamber is filled with liquid by the tank pressure and when the liquid is below the desired level the liquid in the control chamber
is drained to the pressure tank. The presence or absence of liquid in the control chamber causes the control of the liquid inflow or outflow line of the tank.
SEE OR SEARCH THIS CLASS, SUBCLASS:
158, for other liquid level devices of this type which further control the application of a gas pressure to a feed trap to discharge the same to a boiler.
