Metering for sodium hypochlorite applications

The new Qdos 20 pump has been devel­oped to offer high­ly accu­rate sodi­um hypochlo­rite meter­ing in dis­in­fec­tion appli­ca­tions with flow rates to 20 litres per hours at a max­i­mum of 7 bar pres­sure. It is espe­cial­ly suit­able for appli­ca­tions at the well sites of many small­er water treat­ment plants, where oper­a­tors are often inject­ing into water lines at high­er pressure.
The pump fea­tures the same user-friend­ly inter­face and con­trol options, ensur­ing that users have con­ti­nu­ity with any exist­ing Qdos appli­ca­tions.  Offer­ing low total cost of own­er­ship, the new mod­el is designed as a drop-in replace­ment for diaphragm pumps. Qdos pumps also include the ReNu pump­head for sin­gle, no-tools maintenance.
The new pump is suit­ed for tight con­trol for chlo­rine resid­ual. Suc­cess­ful field tri­als and Sca­da data indi­cate a con­sid­er­able improve­ment in vari­a­tion of chlo­rine resid­ual com­pared to even the high­est spec­i­fi­ca­tion diaphragm meter­ing pumps. This is achieved via the twin off­set rotor design.
The Qdos 20 peri­staltic pump tech­nol­o­gy uses two tube chan­nels; where the chan­nels are oper­at­ed out of phase.  Although peri­staltic pumps are gen­er­al­ly low­er in pul­sa­tion than oth­er pos­i­tive dis­place­ment pumps, Qdos 20 reduces this pul­sa­tion even fur­ther by alter­nate tube com­pres­sions ensur­ing pul­sa­tion is bal­anced out.  This results in almost con­tin­u­al pos­i­tive flu­id dis­place­ment, and con­sis­tent meter­ing of chem­i­cal into the application.