Pneumatic diaphragm pump has four materials: plastic, aluminum, cast iron, stainless steel. Diaphragm pumps are based on different liquid medium were nitrile rubber, neoprene, fluorine rubber, PTFE, polyhexamethylene. To meet the needs of different users. Placed in a variety of special occasions, used to pump a variety of conventional pump can not be aspirated medium, have achieved satisfactory results. More Keyword Search : Diaphragm Pumps JINAN SENDO AIR CONDITIONING CO.,LTD , https://www.sendohvac.com