Watson Marlow 620UN/R Peristaltic Pump 265RPM Watertight Module 620N
***Preowned with minimal wear from normal use. 620UN powers on but we are unable to fully test this unit due to missing pump head. 30-day warranty included with purchase. See photos for details.
(Please be advised that any warranty/guarantee/return policy provided from the seller is between the buyer and the seller only. Bid on Equipment is not and cannot be held responsible in any way. Please reference our Terms and Conditions for further information.)
The Watson-Marlow 620UN is a peristaltic pump manufactured by Watson-Marlow Fluid Technology Group. Peristaltic pumps are positive displacement pumps that use rotating rollers or shoes to compress a tube or hose, thereby pushing fluid through the system.
The Watson-Marlow 620UN is commonly used in industries such as pharmaceutical, biotechnology, food and beverage, and environmental. It offers precise flow control, gentle pumping action (which is beneficial for shear-sensitive fluids), and is suitable for handling a wide range of fluids, including corrosive and abrasive materials.
Some key features of the Watson-Marlow 620UN include:
Single-channel design
Easy tube loading and replacement
Accurate flow rates and dosing capabilities
Compatibility with a variety of tubing materials for different applications
Compact and robust construction
Low maintenance requirements
Peristaltic pumps are the simplest pump, with no valves, seals or glands to clog or corrode. The fluid contacts only the bore of a tube, eliminating the risk of the pump contaminating the fluid, or the fluid contaminating the pump. Peristaltic pumps can run dry.
How they work
A compressible tube is squeezed between a roller and a track on an arc of a circle, creating a seal at the point of contact. As the roller advances along the tube, the seal also advances. After the roller has passed, the tube returns to its original shape, creating a partial vacuum which is filled by fluid drawn from the inlet port.
Before the roller reaches the end of the track, a second roller compresses the tube at the start of the track, isolating a packet of fluid between the compression points. As the first roller leaves the track, the second continues to advance, expelling the packet of fluid through the pump's discharge port. At the same time, a new partial vacuum is created behind the second roller into which more fluid is drawn from the inlet port. Backflow and siphoning do not occur, and the pump effectively seals the tube when it is inactive. No valves are needed. The principle may be demonstrated by squeezing a soft tube between thumb and finger and sliding it along: fluid is expelled from one end of the tube while more is drawn in at the other. Animal digestive tracts function in a similar way.
Suitable applications
Peristaltic pumping is ideal for most fluids, including viscous, shear-sensitive, corrosive and abrasive fluids, and those containing suspended solids. They are especially useful for pumping operations where hygiene is important.
Peristaltic pumps operate on the positive displacement principle. They are particularly suitable for metering, dosing and dispensing applications. Pumps are easy to install, simple to operate and inexpensive to maintain.
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