Special Features:

Positions control surface: works through combination of electromagnatic actuator and hyd servo piston; also c/o brg, springs, seals, resistors, retaining rings and misc parts

Properties:

An item which controls both the direction and the rate of flow of fluid in direct response to a primary control of comparatively low level force. It is used for positioning a linear actuating cylinder assembly, and for controlling the rate of travel of the piston. The primary control force may be mechanical, hydraulic, and/or electrical.