Watson Marlow Fluid Technology Group recently launched the latest addition to its Qdos chemical metering pump range. The Qdos Conveying Wave Technology (CWT) is the next level in high performance chemical metering pumps, which delivers all the benefits of a peristaltic pump but with significantly extended service life compared to traditional tube designs. The Qdos CWT offers superior accuracy in chemical metering and dosing applications and eliminates the need for expensive ancillary equipment.

CWT is based on the peristaltic principle to operate a unique fluid contact element whereby alternating compression and relaxation of the hose or tube element draws media in and then propels it out. The Qdos CWT employs an ethylene propylene diene monomer (EPDM) rubber element rather than a tube, which acts against a polyetheretherketone (PEEK) track. This innovative combination results in very low stress levels between the fluid contact elements, giving the Qdos CWT a significantly longer service life than a traditional pump.

Source: Watson Marlow

Additional benefits associated with CWT include the elimination of gas locking, stable performance even with temperature and pressure fluctuations, and mechanical compensation that facilitates high accuracy for the life of the pump.

Watson Marlow’s well-established Qdos drive technology offers a wide range of communication and connection options as well as leak detection software and failure alarm capabilities. The fully sealed pump-head not only ensures chemical containment but minimizes operator exposure to chemicals. The pump-head can be safely changed tool-free in less than a minute.

Qdos CWT pump consistently doses chemicals such as sodium hypochlorite with a high level of accuracy, eliminating the need to overdose to ensure reliable treatment. The pump is not affected by ambient temperature variations and the IP66 NEMA 4X rated casing ensures resilience in harsh operating environments. The Qdos CWT delivers flow rates up to 500 ml/min at up to 7 bar (100 psi).