3 • Unit description
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80116-261
2018-07
Description of function
Peristaltic pump principle The EIP 2 (Erbe Irrigation Pump) is a peristaltic pump. This operating prin-
ciple is based on pressing or squeezing a flexible pump hose at one or
more points and on movement of the squeezed point in the desired direc
-
tion of liquid flow. For this reason peristaltic pumps are sometimes re-
ferred to as peristaltic squeeze pumps. Movement of the squeezed point is
accomplished with the aid of a pump rotor that has rollers around its pe
-
rimeter. Flow is determined by rotor speed (speed of motion of the
squeezed point) and internal cross-section of the hose.
Advantages of peristaltic pumps With peristaltic pumps the medium and the pump do not come into contact
with one another. Therefore peristaltic pumps are particularly suited for
metering a very wide range of media. As opposed to other types of pump
like diaphragm pumps, with peristaltic pumps it is very easy to adapt the
material of the pump hose, or components coming into contact with the
medium, to the product being pumped. A pump hose is selected and used
that is chemically suited for the product being pumped ("milled hose").
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