NASA NTRS · 19660000254
Flow ring valve is simple, quick-acting
Abstract
Two porting rings, one within the other, control gas or liquid flow by using seal buttons as the sliding valve closers. Multiporting within the ring allows close control of the flow by the slight rotation of the outer porting ring.
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Lindfors, J. A.. 1966-06-01. Flow ring valve is simple, quick-acting. https://ntrs.nasa.gov/citations/19660000254
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