Changshu Kexin Automation Equipment Co., Ltd.
Changshu Kexin Pneumatic Automation Equipment Co., Ltd. We are your first choice of,pneumatic actuators in China with the tenet of "Competitive Prices with First Quality and Satisfying Services".
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THREE-POSITION PNEUMATIC ACTUATOR
The three-position actuator is mainly used for the process control of 3-way or 4-way valves or other three-position rotating devices.We provide 2 kinds of three-position actuators: 90° range (mid-position from 20° to 80°) and
180° range (mid-position from 90° to 170°)
The mid-position of three-position actuator is achieved by a set of mechanical stops from 2 auxiliary pistons and adjusting limit screws.
Position 1 (middle position)
Air source pressure enters port 2 and port D at the same time, air is discharged from port 4 and port C, port 2 moves as an internal piston, and port D is limited by the auxiliary piston push rod to limit the internal piston to be positioned at a predetermined intermediate position.
Position 2 (full open position)
The air source pressure enters port 2 and port C at the same time, the air is discharged from port 4 and port D, and the internal piston of port 2 continues to move.causing the pinion to rotate to the full open position.
Position 3 (full closed position)
Air source pressure enters port 4, air is discharged from port 2, and the internal piston moves to the middle direction to reach the full closed position.