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US 8,758,693 B2Granted
Electric valve left mechanism
AssigneeMegtec Systems, Inc.
InventorMichael P. Bria
Life of this patent
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AssigneeMegtec Systems, Inc.
InventorMichael P. Bria
Estimating the term…
A valve lift mechanism for actuating a valve in the vertical direction, and a regenerative thermal oxidizer including the valve and lift mechanism is disclosed. The valve is allowed to move vertically and oscillating rotary motion is possible. Vertical movement is achieved using the valve lift mechanism without the use of compressed air. In certain embodiments, the valve lift mechanism includes a torque motor. Preferably, a non self-locking screw jack is used to adjust the vertical height of the valve. Vertical movement can reduce the torque needed to rotate the valve, and also facilitates servicing of the valve. For example, if the valve experiences high temperature, and consequently expands, rotating the valve against the mating seal plate can be difficult, if not impossible. By lowering the valve slightly, the frictional forces between the valve and the mating seal plate are reduced, allowing freer rotational movement of the valve.
A regenerative thermal oxidizer comprising at least first and second heat exchange columns each in communication with a combustion zone, a valve for directing gas flow into and out of said columns, said valve in contact with a seal plate, and an electric valve lift mechanism for actuating said valve, adapted to hold said valve in contact with said seal plate, wherein said electric valve lift mechanism comprises a motor and a non self-locking screw jack.
Dependencies are inferred from the claim text.