Pneumatic Actuator Air Torque Quarter Turn EX Explosion Proof Double Acting Pneumatic Rotary Actuator For Ball/Butterfly Valve

Product Overview

Description

The scotch yoke type cylinder is a stroke piston type actuator suitable for closing or metering control of 90 ° angle valves (such as ball valves, butterfly valves, and plug valves).The scotch yoke type cylinder usually refers to the structure of a "single cylinder double piston variable torque scotch yoke type" pneumatic actuator.

Working principle of scotch yoke type cylinder:

Compressed air enters the cylinder and pushes the piston in a straight line motion.The piston utilizes the U-shaped groove design of the piston pin and shift fork to convert the linear motion of the piston into the rotation of the shift fork. The rotation of the fork drives the output shaft to rotate, thereby achieving control of the valve.

Product classification of scotch yoke type cylinders:

According to the different types of actions, it can be divided into single acting scotch yoke type cylinders and double acting scotch yoke type cylinders.The opening and closing actions of the actuator are all driven by an air source, which is a double acting scotch yoke type pneumatic actuator; Only opening action is driven by the air source, while the closing action is a spring return single action scotch yoke type pneumatic actuator.

According to different structures, scotch yoke type cylinders can be divided into single cylinder piston type and double cylinder piston type.

According to the different main materials, the scotch yoke type cylinder can be divided into aluminum alloy type, stainless steel type, carbon steel type, etc.

When the torque requirement is higher than 7000Nm, rack and pinion actuators are usually not cost-effective. Therefore, when choosing a fork type cylinder, it is generally recommended to choose a high-power scotch yoke type pneumatic actuator, which can provide higher torque output.

The symmetrical and inclined steel fork mechanisms of high-power shift fork cylinders allow for two torque output characteristics. The inclined steel fork mechanism has high starting torque and low operating torque, making it suitable for controlling butterfly valves; The symmetrical steel fork mechanism has a more balanced torque curve and is mainly suitable for valve control of ball valves and cocks.