1.Pneumatic,air operated 2.Adjustable speed 3.Simple operation 4. Explosion proof pneumatic crane 1. A pneumatic hoist is the most optimum lifting device in the world and has been widely used in industrially developed countries, because that it takes the following advantages over a motor hoist: First, the pneumatic hoist cannot generate electric spark, so it completely solves the anti-explosive problem. Explosion-proof grade: 1 Hazardous area,Including 2C,Group T5 and below. Second, the pneumatic hoist the 100% work system, so as to make the required conditions for high-efficient continuous jobs. Third, the pneumatic hoist sees a fast operating speed which is 2-3 times more than the motor hoist, and the first one can present the nonpolar variable speed. Fourth, the pneumatic hoist features endurance on acid, alkaline, steam and high-powder dust. Fifth, the pneumatic hoist is small in size and operated easily; and it is only 1/3~1/8 of the weight of a motor hoist whose specification is same. 2. Based on the abovementioned characteristics, the pneumatic hoist is widely used in the areas of petroleum, chemical industry, coal, textile, machinery production, ship and ammunition.