This pump is powered by compressed air and therefore produces no sparks, static electricity, or electromagnetic interference during operation Wide compatibility with a variety of fluids The output flow rate can be adjusted seamlessly and steplessly by simply adjusting the air source pressure or suction volume via the needle valve Separate the pneumatic chamber and working chamber to prevent contamination of the medium Designed with reasonable and simple structure, this pump is easy to install, operate and maintain, Manufacturer: Santiway