Low profile control valve actuator

Abstract

Abstract A control valve actuator consisting of a rectangular frame cut squarely from a rectangular steel tube. the valve is mounted adjacent the outside center of one of the longer sides of the frames. A sheet metal case is formed into a pie-plate shape and is mounted on the inner side of one of the longer sides of the frame with the flat portion of the pie-shape abutting said frame side and with the annular skirt of the pie-shape extending away from said side. A rubber diaphragm is positioned in the case and locked in by a steel ring mounted along the inner edge of the annular skirt. An adaptor is passed through a central opening in the diaphragm, and a rigid metallic disc or plate is mounted on the adaptor and locked in place to clamp the adaptor assembly to the diaphragm. An actuating rod extends from the adaptor assembly to the valve. A heavy coil spring surrounds the rod and extends from the opposite side of the frame to the disc to bias the disc and diaphragm toward the inner surface of the pie-plate case. When air under pressure is introduced to said diaphragm through vent means mounted outside the frame adjacent said case (as by an actuating signal), the diaphragm moves the disc against the spring and moves the rod to either open or close the valve. Release of the pressure allows the spring to push the disc and diaphragm back to its original non-operative position.

Inventors

• 👤 Linwood P Erickson

Bibliographic Details