Water & Wastewater Asia January/February 2022

HOTSEAT
if needed. To successfully manage the
The reinforced construction of the
challenges of wastewater treatment,
peristaltic hose and its use of rubber
the pump’s hose and inserts need
compositions – such as natural rubber,
to offer the highest level of material
ethylene propylene diene monomer
compatibility, while also being able to
(EPDM), Buna-N, and more – that
reliably deliver the millions of pumping
have been specially designed for the
cycles that are required during their
stresses within the peristaltic hose
lifetimes.
allow for the optimum lifecycle and
performance.
A critical consideration when
selecting the hose material
For more than two decades,
is its “fatigue resistance”.
peristaltic hose pump technology
This trait defines how resistant to
– as epitomised by the standard-
failure the hose material is as it runs
setting operation of the Abaque
through its millions of pumping cycles.
Peristaltic Hose Pump family – has
solid-laden slurries, and waterthin,
shear-sensitive and viscous
Above: HD65
peristaltic hose
pump from Abaque
A hose material that is susceptible
to developing cracks and holes
early in its operational life is not as
offered the performance and reliability
that can make it an ideal pumping
option for wastewater treaters who
materials.
desirable as a material that can reliably
crave highly reliable, environmentally
MAKING THE CASE
Peristaltic hose pumps stand out
because their operation is based
on the alternating contraction and
Below: Construction
of a peristaltic hose
pump
handle the demands of the repeated
contraction and relaxation of the
hose, especially when particulateladen
liquids are being pumped.
friendly, low-maintenance pump
operation.
Sebastien Brosse is team leader at Abaque.
relaxation of the hose, which forces
the contents to move through
the pump and into the discharge
piping. The smooth-wall, flexible
hose is squeezed between shoes
on the rotor and the inside of the
pump casing. This rotation moves
the product through the hose at a
constant displacement rate. The hose
restitution after the squeeze produces
an almost full vacuum that draws
more product into the hose from the
intake piping. The pumped product
only contacts the hose and inserts,
making this pumping technology
suitable for abrasive and corrosive
applications.
Peristaltic hose pumps also maintain
volumetric consistency, making them
ideal for the strict dosing and 24/7
operating cycles that can be required
in wastewater treatment applications.
They are also easy to operate and
maintain, and their reversible operation
allows for pumping in both directions,
WATER & WASTEWATER ASIA | JANUARY/FEBRUARY 2022 53