Electronic capacity control valve for portable screw compressor

A screw compressor comprising:

• a compressor housing defining a compression chamber;
• a female compression screw disposed within the compression chamber;
• a male compression screw disposed within the compression chamber and interfacing with the female compression screw;
• a plurality of bypass ports formed in the compressor housing and providing fluid communication through the compressor housing;
• a spiral valve comprising:
• an actuator module disposed adjacent an exterior of the compressor housing, the actuator module comprising:
• an electric motor;
• a gearbox mechanically coupled to the electric motor to transmit a torque from the electric motor;
• a shutter coupled to the gearbox to rotate in response to the transmitted torque from the electric motor, wherein the shutter is positioned to open and close one or more of the plurality of bypass ports formed in the compressor housing based on a rotational position of the shutter,
• wherein a compression length of the screw compressor may be controlled by controlling the opening and closing of the one or more bypass ports of the plurality of bypass ports.