Product Announcement from Watson Marlow Pumps Group
Nothing but the hose or tube touches the fluid, eliminating the risk of the pump contaminating the fluid, or the fluid contaminating the pump.
The most effective engineering solutions are the simplest. The peristaltic pump action is low-shear and is created by compressing the hose element between rotating rollers or shoes. In between each pass of a roller, the hose recovers to create a vacuum and draws in fluid. This simple dynamic effect requires no seal or valves and the fluid is totally contained within the hose, separated from the pump.
No other positive displacement pump offers this unique separation of pump and fluid. Watson-Marlow Bredel pumps clearly outperform other pump types, such as piston, progressive cavity or diaphragm pumps which rely on seals and valves for their operation - often a cause of air ingress, high maintenance and pump failure.
The illustration shows fluid being drawn into a pump, trapped between two shoes (in a Bredel pump) or rollers (in a Watson-Marlow pump), and finally being expelled from the pump. The gaps between the packets of fluid are shown only to help visualise the action.
The complete closure of the hose which is squeezed between a shoe and the track gives the pump its positive displacement action, preventing backflow and eliminating the need for check-valves when the pump is not running.
- There is no contamination of the pump or fluid
- Ideal for slurries, viscous, shear-sensitive and aggressive fluids
- Easy to install, simple to operate, inexpensive to maintain
- Pump design prevents backflow and syphoning without valves
- Wide range of tubing includes industrial, food-grade and medical