Pneumatic plate lifters operate on compressed air to lift and move heavy plates. The mechanism typically involves a system of suction cups or gripping devices that create a vacuum or mechanical grip on the plate's surface. The compressed air is channeled through the pneumatic system, activating the suction cups or grips. Once the lifter establishes a secure hold on the plate, it uses air pressure to lift and transport the material. Pneumatic systems are favored in such applications because they offer high lifting capacities, are easy to control, and have relatively low maintenance compared to electric or hydraulic lifting systems.