What is the difference between heavy duty pneumatic actuator and rack pinion pneumatic actuator

The HXY series heavy duty pneumatic actuator and JAT series rack pinion pneumatic actuator are all manufactured by Zhejiang Jimai Auto-tech Co., Ltd. These two pneumatic actuators are compatible with quarter-turn valves, including butterfly valves and ball valves. The output torque of the double-acting JAT series pneumatic actuator is limited to 6512NM when operating at 4 bar air pressure. The output torque of the HXY heavy duty pneumatic actuator is greater than that of the JAT series rack pinion pneumatic actuator. Under 4 Bar air pressure, the spring return type of the HXY series pneumatic actuator can generate an output torque of 30,000 NM, while the double-acting type can generate an output torque of 10,7847 Nm under the same conditions. This enables the HXY series pneumatic actuator to be employed with larger valves.

The HXY series heavy duty pneumatic actuator operates on the principle that the piston is propelled in a straight line by compressed air entering the cylinder. The scotch yoke's U-shaped groove design and piston pin enable the piston to transform its linear motion into the scotch yoke's rotational motion. The output shaft is rotated by the rotation of the scotch yoke, which in turn regulates the valve.Concurrently, the output torque can fluctuate in accordance with the angle due to the scotch yoke transmission structure. The torque value is at its highest in the open or closed position of the valve, which is in accordance with the valve's pattern and does not result in torque waste. Consequently, the necessary cylinder diameter can be reduced.

The JAT series pneumatic actuator operates on the principle that compressed air enters the actuator body and acts on the piston portion, causing the piston to move. This movement then causes the rotating shaft to rotate in either a clockwise or anticlockwise direction, resulting in the valve being opened or closed.