Manual butterfly valve in aluminium alloy compressed air pipeline is a kind of valve made of aluminium alloy material, which is specially used to control the flow of compressed air in pipeline. Manual Butterfly Valve operates the rotation of the butterfly plate through the handle, so as to realise the on/off control of the medium in the pipeline.Manual Butterfly Valve has the advantages of simple structure, light weight, small size, easy installation, flexible operation, etc., which is especially suitable for the on/off control of the medium in the low-pressure pipeline. Aluminium alloy as the material choice, endowed Manual Butterfly Valve with light weight, corrosion resistance, good thermal conductivity and other characteristics, so that it has been widely used in compressed air piping system. Aluminium alloy manual butterfly valve not only has good sealing performance, but also has a long service life, easy maintenance, is an indispensable and important component in compressed air piping system.