Double Diaphragm pump is used at the coating field in more higher safety required. for example, the general paint coating, PU paint, UV special paint etc. all can be transferred, furthermore,can be connected with air spray gun, electrstatic spray gun & auto spray gun etc.,directly, meanwhile, the double diaphragm pumps also can be used to circulate ink for painting. the pumps are being with compact, equal & transferred with farge volume etc.