HARD COATED SUPPLY BIASED SPOOL VALVES
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United States of America Patent
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app pub date -
Jan 31, 2017
filing date -
Nov 8, 2013
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Abstract
Hard coated spool valves are disclosed. An example spool valve includes a sleeve and a spool to be positioned within the sleeve. The sleeve and the spool are made of a corrosion resistant material. The spool valve includes a wear resistant coating on at least one of the spool or the sleeve.
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