The cylinder is one of the main components of pneumatic drive, and it can be divided into single acting cylinder and double acting cylinder according to its action mode. Single acting cylinder refers to the movement of the piston rod in one direction of the cylinder driven by compressed air, and in the other direction driven by spring to reset. Double acting cylinder is the cylinder driven by compressed air in both directions of the piston rod. The cylinder can be divided into three types according to its motion mode: linear motion cylinder, rotating cylinder, and air claw The linear motion cylinder drives the actuator to perform linear reciprocating motion; The rotary cylinder drives the actuator to rotate back and forth; The pneumatic gripper drives the actuator to perform opening and closing movements, mainly used for gripping and clamping workpieces or products According to ordinary cylinders, waterproof cylinders, and clean cylinders, they can be divided into ordinary cylinders, waterproof cylinders, and clean cylinders. Ordinary gas cylinders are suitable for general working environments; Waterproof gas cylinders are suitable for environments with water mist and certain humidity; Clean gas cylinders are mainly used in the working environment of clean rooms.