Product Description
Three Wire Incremental. Magnetic Clutch Provides constant output force for positive closeoff of valves, and protects motor in stall conditions. Durable Construction Provides a longer cycle life. Unique Yoke Design Easy field mounting to valves reduces installation and stroke adjustment time. Selectable Direct/Reverse Action Eases setup and installation. The VA-715x Series synchronous motor-driven actuator provides incremental (three wire), incremental with feedback, or proportional control of valves with up to 3/4 in. stroke in heating, ventilating, and air conditioning applications. This compact, non-spring return actuator has a 90 lb force minimum and responds to a variety of input signals. The VA-715x Series can be easily field mounted or ordered factory coupled to VT Series terminal unit valves, VG7000 Series valves, or VBC Series bronze cage trim valves. In addition, this actuator can be field mounted to 1/2 in. flare valves. Refer to the VT, VBC, VG7000, and VTF Series bulletins for available configurations. Incremental Control--VA-7150 A controller provides 24 VAC to the Up, Down, and Common terminals depending upon the desired movement of the valve stem. This signal causes the motor to rotate in the proper direction. The gear train and drive screw move the valve stem up or down. When the controller stops sending a signal, the valve stem is held in place and remains in position until the next control signal is sent.. Johnson Controls. Johnson Controls. VA-7150-1001.