NASA NTRS · 19850020972
Linear motion valve
Abstract
The linear motion valve is described. The valve spool employs magnetically permeable rings, spaced apart axially, which engage a sealing assembly having magnetically permeable pole pieces in magnetic relationship with a magnet. The gap between the ring and the pole pieces is sealed with a ferrofluid. Depletion of the ferrofluid is minimized.
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Chandler, J. A.. 1985-06-18. Linear motion valve. https://ntrs.nasa.gov/citations/19850020972
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