 The
principle of the peristaltic hose pump is based on the alternating contraction
and relaxation of the hose forcing the contents through the pump and
into the discharge piping. A smooth wall, flexible hose is fitted in
the pump casing and is completely squeezed between two shoes on the rotor
and the inside of the pump casing. The rotating action moves the product
through the hose at a constant rate of displacement without slip. The
hose restitution after the squeeze produces an almost full vacuum that
draws the product into the hose from the intake piping. The pump casing
is half-filled with lubricant to cool the pump and lengthen the service
life of the shoes and hose. Since the product only contacts the hose
and not the internal pump components, this pumping technology is very
suitable for abrasive and corrosive applications.
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