Manufacture of actuators and control valve assemblies

An actuator, comprising:

• a housing comprising a plurality of walls secured to one another with fasteners to form an interior cavity;
• a torque hub disposed in the interior cavity, the torque hub comprising a hollow cylinder and a pair of flat plates that are releasably engaged with one another via fasteners, the flat plates having an aperture to receive the hollow cylinder, each of the hollow cylinder and the flat plates having interfacing geometry that defines flats interior to aperture and exterior to the cylinder that engage with opposing flats on the other, the hollow cylinder having a longitudinal axis and the flats are disposed circumferentially about the longitudinal axis;
• and
• a load generator coupled with the torque hub.