NASA NTRS · 19910000662
Lock For Valve Stem
Abstract
Simple, cheap device locks valve stem so its setting cannot be changed by unauthorized people. Device covers valve stem; cover locked in place with standard padlock. Valve lock made of PVC pipe and packing band. Shears, drill or punch, and forming rod only tools needed.
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Burley, Richard K., Guirguis, Kamal S.. 1991-12-01. Lock For Valve Stem. https://ntrs.nasa.gov/citations/19910000662
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