.~.~.~ Valve member actuated responsive to absolute gaseous motive fluid pressure or flow rate
DEFINITION
Classification: 417/115
(under subclass 109) Apparatus wherein said valve means is actuated in response to the attainment of an absolute rate of flow, pressure or other absolute condition of the motive fluid to control the flow of motive fluid injected into the pumped fluid.
SEE OR SEARCH THIS CLASS, SUBCLASS:
109, for devices having unbiased check valves in the gaseous motive fluid line which merely acts to prevent the flow of the liquid to be pumped back into the motive fluid line and which, by their nature, permit flow of motive fluid to flow therethrough whenever the pressure of the motive fluid exceeds that of the pumped fluid.
110, for those devices having motive fluid injection control valves which are controlled in response to the flow of the pumped fluid and which may also be influenced by a motive fluid condition.
117, for those devices having motive fluid injection control valves which are actuated to permit the flow of motive fluid into the pumped fluid in response to a static head build up of pumped fluid.
