How do they work?
Pumping performance is achieved through positive displacement. A screw shaped rotor is placed within a stationary stator, to form a number of cavities containing fluid. These cavities are progressed forward through the pump by the rotating action of the rotor, creating a continuous flow.
As such, the pumps are constructed from of a large number of consumable parts—a rotor, a stator, a coupling, a drive shaft, a mechanical seal.
Limitations are the large footprint of the design and the significant downtime require for maintenance due to the large number of moving parts over other pump types.
Why choose peristaltic technology over PC pumps?
Progressive cavity (PC) pumps cannot run dry, so users must avoid delays in the fluid reaching the rotor/ stator, or manually prime the pump before use.
By comparison, WMFTS peristaltic hose and tube pumps can run dry without damage and are self-priming.
Additionally, PC pumps rapidly suffer component wear if the pumped fluid contains abrasive particles or solids in suspension. Rotor and stator replacement is a skilled task requiring long downtime and expensive spare parts.
Fluid in a WMFTS peristaltic pump passes through an abrasive-resistant tube or hose. There are no other components in the fluid path. When needed, changing a hose or tube can be done in minutes, without special tools or skilled labour and with the pump remaining in-situ.
WMFTS pumps features include
- Easy to install, simple to operate and inexpensive to maintain
- Low shear, gentle handling up to 108 cubic metre/hr, pressure to 16 bar
- No ancillaries needed for installation or running
- Superior flow stability and metering accuracy