PeriBest Pumps I12, Руководство пользователя

Страница: 12 / 29

MANUAL PERIBEST I12 – I17 – I21
12 | 29
The pump hose liner material should be chemically resistant with the product to be pumped.
Dependent on the specific requirements of your application a corresponding pump hose must be
selected. For each pump model various hose types are available. The material of the inner liner of
the pump hose determines the hose type. Each hose type is marked by a unique colour code.
Hose type Material Colour code
NR Natural Rubber Red
NBR Nitrile Rubber White
EPDM EPDM Blue
HYPALON CSM Green
The PeriBest pump hoses have been carefully machined, therefore there are minimum tolerances in
wall thickness. It is very important to guarantee the correct compression of the pump hose, because:
-
When the compression is too high, it creates a too high load of the pump and pump hose,
which may result in a reduction of the life of the pump hose and bearings.
-
When the compression is too low, this will result in loss of yield and backflow. Backflow
results in a reduction of the life of the pump hose.
In order to achieve optimal life of the pump
hose, the compression force of the pump
hose can be adjusted by placing several
shims under the pressing rollers.
The shims are fitted between the rotor and
the pressing roller.
The number of shims will vary for each
counterpressure situation.