Abstract: A control valve for use in conjunction with the control system of water powered field irrigation equipment has a valve housing provided with an inlet opening, an outlet opening, and a flow passage connecting the inlet and outlet openings. The flow path is selectively blocked and unblocked by a valve element actuated by a pilot valve controlled remotely by an operator of the equipment in order to determine the direction of rotation of a drive motor which propels a portion of the equipment about a pivot axis as a function of the position of other portions of the equipment. A fluid actuated motor provided with an eccentrically mounted output cam permits control of the time the end unit of the equipment, which unit controls the operation of other units disposed between the end unit and the pivot axis, is on and off in order to obtain a continuous speed control of the equipment.

Abstract: A hydraulic actuated load sensing governor device for use with a wheel mounted sprinkler which is driven from an inward radial discharge type turbine. This inward radial discharge turbine has an inverse pressure-speed characteristic which is an important part of the governor operation.