Non electric ball valve is also called fabric electric ball valve, which is commonly used at the inlet and outlet of blower and induced draft fan. The flexible ring belt is generally composed of canvas, glue coated canvas and ceramic canvas. With the development of the fan industry, the shortcomings of aging resistance, corrosion resistance and weather resistance are gradually exposed. The flexible materials often used by electric ball valve manufacturers before can no longer meet the requirements of modern industrial environment. According to the modern wind turbine factory and the use environment, our company added fireproof cloth, glass fiber cloth, alkali free asbestos cloth, tetrafluoro cloth, tetrafluoro film and ethylene propylene diene monomer (EPDM) materials to the previous flexible materials, and added the features of waterproof, anti-corrosion and good sealing that the flexible ring belt did not have in the past. Non electric ball valves now account for a large part of the electric ball valve products. The overall electric ball valves are classified into: pipe electric ball valves and non electric ball valves. Generally, pipe electric ball valves are used for pressure pipelines. However, non electric ball valves are generally used in low pressure air and flue gas pipelines. Non electric ball valves have incomparable advantages over electric ball valves. In recent years, the use of non electric ball valves in the domestic market and various foreign-funded enterprises has been growing steadily. Our design engineers and supervisors of the Quality Inspection Department have developed a variety of non electric ball valves on the premise of ensuring the quality, increasing the scope of use of non electric ball valves. At the same time, our company has expanded its scale and reduced its cost, so that our products can be sold at home and abroad and get consistent praise. Customer satisfaction is the driving force for the continuous development of our enterprise. We hope that engineers who need non electric ball valves will come to inspect the factory and promote our long-term cooperation.