Yamada’s AODD Pumps are air powered double diaphragm pumps and are used for many industrial purposes. These are just a few of there pump series” NDP-5, DP-10 / DP-15, NDP-15, NDP-20, NDP-25, NDP-32, NDP-40, NDP-50 & NDP-80. Yamada also offers drump pump models as well as models with an array or construction materials for your specific needs.