(under the class definition) Subject matter wherein a restricted passage is provided in parallel to a main valve.
(1) Note. The usual purpose of such restricted passage is either to provide a bleed across the valve to permit a minimum flow of current when the valve is closed or to equalize pressure across the valve.
SEE OR SEARCH THIS CLASS, SUBCLASS:
118+, for valves having a material guide or restrictor in series flow relation.
SEE OR SEARCH CLASS
137, Fluid Handling, 513.3+, for direct response valves having an open bleed port, subclasses 599+ and 625.28+ for distribution systems comprising flow paths which divide and recombine, and see the search notes thereto for notes on by-passes and subclasses 629+ for sequentially progressive actuation of plural valves for pressure equalizing flow.
