Piston and Cylinder Actuated Polymer Mixing Valve
Patent, Filed 20 Apr 1998, patented 20 Jul 1999
DEPARTMENT OF THE NAVY WASHINGTON DC
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This patent discloses a valve for introducing polymer into a moving water stream prior to flowing the water stream, with the polymer therein, onto a hull surface of an underwater vehicle. The valve comprises a venturi block having therethrough a venturi passageway for flowing water therethrough, a polymer inlet tube extending through the venturi block and into the venturi passageway for introducing the polymer into the water flowing through the venturi passageway. A shut-off plunger extends through a bore in the venturi block and is axially aligned with the polymer inlet tube, the plunger being reciprocally movable in the bore between a first position in which a head portion of the plunger extends into and seals closed the polymer inlet tube, and a second position in which the head portion of the plunger is spaced from scaling engagement with said polymer inlet tube. A piston and cylinder assembly moves the plunger between the first and second positions.
- Marine Engineering
- Pumps, Filters, Pipes, Tubing, Fittings and Valves