Tasked with replacing ageing pumps
for disinfectant and coagulant
processes at Thames Water’s
Advanced Water Treatment Works in
Walton, engineering, consulting and
construction company Black &
Veatch opted for peristaltic pumps
from the 520 and 620 series from
Watson Marlow Pumps Group.

Offering continuous high pressure
and quick release functionality, the
620 series close-coupled units pump
inorganic polymer coagulants which
perform well with thick flocs and
offer fast sedimentation. At the
disinfection stage sodium hypochlorite
is added to contact tanks by the 520
series pumps.