This positive displacement, bellows type metering pump with Bel-O-Just crank for adjustable flow rate dial

Infinite speed adjustments from 12 to 60 rpm. Speed control and bellows stroke length offer both pulse rate and dispensing versatility. Flow range from 3.9 to 409 mL/ min. Polypropylene bellows provide excellent corrosion resistance, is self-priming, generates no friction, moves air or pulls a vacuum. Self flushing, conical Viton poppet valve prevents backflow through pump. 3/8" swivel elbow connectors on inlet/outlet.