a positive displacement pump that has no valves, seals or glands, and the fluid contacts only the bore of the hose or tube
variable speed (flow rate) pump consisting of 8-12 rotating rollers pinching a flexible tube. Multiple channel pumps can pump several tubes at one time. Some pulsation. Used in flow injection and continuous flow techniques (amongst others).
A type of pump in which the forward movement of material inside a tube is performed in a wave-like fashion caused by the contraction and dilation of the tube in a longitudinal direction.
A self-priming pump that achieves pumping action by moving a system of rollers against a flexible tube.
A pump functioning by alternate pinching and release of tubing which drives the fluid forward in a pulsing action. The major advantage is that the peristaltic pump is noninvasive, i.e., the pump does not contact the fluid being filtered, and only the inner wall of the tubing contacts the fluid. It is used for tangential flow filtration as well as other pressure driven filters.
