Hitachi Global Air Power Us, LLC

Don Weinkauf

Hideki Fujimoto

Jonathan D Batdorff

Christian Vaughn

A spiral valve and a screw compressor having a compressor housing and the spiral valve are provided. The spiral valve includes an actuator module having an electric motor and a gearbox mechanically coupled to the electric motor to transmit a torque from the electric motor, and a spiral valve body coupled to the gearbox to rotate in response to the transmitted torque from the electric motor. The spiral valve body has a first shutter positioned to open and close one or more of a plurality of bypass ports formed in the compressor housing based on a rotational position of the second shutter, a second shutter positioned to progressively open and close a compressor inlet transfer duct formed in the compressor housing based on a rotation position of second shutter, and a gap formed between the first and second shutters.

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Mishawaka, IN, United States of America

Don Weinkauf