The pneumatic diaphragm valve has the advantages of small negative foroe, large flow, no leakage,

convenient and reliable. fireprool and explosion- prool, and it is wid ely used in the strong acid, strong alkall,

strong corrosion and high viscosiby in indusrial automation system, with the use of corrosionresistant valve

and corro sion resistant diaphr agm. non packing structure, and throttle element for elastic d laphragm and

smooth flow channel, The flow regulation of media containing spikelets, fibers and toxic and non polluling

media.