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PULSE Installation, Commissioning and Servicing Manual - Revision 19
8
BENNETT PUMP UNIT
The Gallagher PULSE uses the Bennett T140 high fl ow pumping unit on commercial
Ultra High Flow pump applications.
In order to maintain Warranty and avoid premature pump failure, belt damage and
fuses blowing, Service and Install Technicians must be aware of the following:
The pump must NEVER be run dry for periods exceeding 5 minutes as the fuel is
necessary for cooling. Should 5 minutes of running dry occur, the pump must be
allowed to rest for a minimum of 30 minutes.
The pump is not to be used to clean supply lines and should NEVER be operated
without the strainer fitted.
The pump is fitted with an integral check valve. Although it is standard practice
to fit a check valve at the base of the pumping unit, this is not required with the
Bennett Pump. The adding of an external check valve decreases the available lift.
Correct belt tension (155N) is necessary for maximum belt life and optimum pump
operation. A belt tension gauge is the only accurate way to measure tension.
Best performance is achieved with a lift of no more than 3m. Greater lifts will see
an increase in pump noise, vibration and a decrease in flow rate.
Excessive cavitation/vibration (due to a blocked filter on the suction side, high
suction lift or an air leak) must be avoided and may result in pump or belt failure
and/or motor fuse tripping.
The by-pass pressure setting of the unit should be no more than 34.5 KPa higher
than the operating pressure at full flow.
When attaching the inlet flange the maximum depth of available thread
engagement in the pump casting is 13mm. Fasteners longer than this will cause
irreparable damage to the pumping unit.
4 x M8 Bolts
Figure 6�
Bennett Pump Unit
