Air operated double diaphragm pump for dosing and transferring a wide variety of fluids. for OEM applications and industrial processes with lower flow rates. The unbalanced spool valve air motor requires lower start up pressure, for finer flow adjustment using regulating air pressure. The pump’s wetted materials are compatible with the most aggressive fluids and are suitable for use in corrosive environments. The air motor (directional air valve and air chamber covers) is made from polypropylene. This is a fully groundable ATEX certified pump, which are available for use in potentially explosive atmospheres (Ex II2 GD IIB/IIC 95°C)