.~ With control of flow by a condition or characteristic of a fluid {6}
11
.~.~ For regulating boiler feed water level
DEFINITION
Classification: 137/11
(under subclass 2) Processes in which one or more conditions or characteristics of a fluent material is determined and used to control the flow of boiler feed water.
SEE OR SEARCH THIS CLASS, SUBCLASS:
94, for fuel control devices for boilers responsive to boiler or water system conditions.
156+, for gas pressure discharge of liquid feed traps to boilers.
386+, for liquid level responsive or maintaining systems.
SEE OR SEARCH CLASS
122, Liquid Heaters and Vaporizers, 451+, for boiler feeders combined with boilers, and subclasses 412+ for boiler feed heaters.
