TM057917
Drain hole in motor flange
If twin-head pumps are used for pumping liquids with
a temperature below 0 °C (32 °F), condensed water
may freeze and cause the coupling to get stuck. You
can solve the problem by installing heating elements.
Whenever possible, install the pump with the motor
shaft in horizontal position. See figure Automatic air
vent.
Observe the conditions in section
Operating conditions.
8.1 Pipes
Fit isolating valves on either side of the pump to avoid
draining the system if the pump needs to be cleaned
or repaired.
The pump is suitable for pipeline mounting, provided
that the pipes are adequately supported on either
side of the pump.
Single-head pumps are designed for pipeline
mounting only.
Twin-head pumps are prepared for installation on a
mounting bracket or base plate.
When installing the pipes, make sure that the pump
housing is not stressed by the pipes.
The inlet and outlet pipes must be of an adequate
size, taking the pump inlet pressure into account.
To avoid sediment build-up, do not fit the pump at the
lowest point of the system.
Install the pipes so that air locks are avoided,
especially on the inlet side of the pump.
TM002263
Correct pipes on the inlet side of the pump
The pump must not run against a closed
outlet valve as this will cause an increase
in temperature or formation of steam in the
pump, which may cause damage to the
pump.
If there is any risk of the pump running against a
closed outlet valve, ensure a minimum liquid flow
through the pump by connecting a bypass or a drain
to the outlet pipe. The drain can for instance be
connected to a tank. A minimum flow rate of 10 % of
the flow rate at maximum efficiency is needed at all
times.
Flow rate and head at maximum efficiency are stated
on the pump nameplate.
13
English (GB)
To Next Page
Loading...
