Remotely-controlled variable-orifice valve used to adjust back pressure in tests of flow of air in duct. Disk with holes rotated on fixed disk with similiar holes to adjust cross sectional area available to flow. Features include compactness and reduction of perturbation. Moved easily from one flow-test facility to another.
Remotely-Controlled Variable-Orifice Valve
NASA Tech Briefs ; 14 , 6
1990-06-01
Miscellaneous
No indication
English
Pressure variable orifice for hydraulic control valve
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