(under subclass 278) Apparatus in which the feed to the distinct flame holding sections is under the control of a single valve element having one or more grooves or passages that coacts with a valve seat to control the feed to one of the flame holder sections independently of that to another.
SEE OR SEARCH CLASS
137, Fluid Handling,
625+, for an arrangement in which a multiway valve unit controls flow in a fluid handling system of more general application.
