
2.5 Direction of rotation
• In its standard configuration, the MOUVEX P BI series
pump is supplied as reversible and with counterclock-
wise rotation.
NOTE :
THE VIEWS CONTAINED IN THIS INSTRUCTION MANUAL
SHOW PARTS IN THE STANDARD DIRECTION OF ROTATION.
The rule governing the inlet side and the direction of
rotation is as follows :
• The inlet will be on the left side of the pump if the direc-
tion of rotation is counterclockwise (seen from the shaft
side).
• The inlet will be on the right side of the pump if the
direction of rotation is clockwise.
The direction of rotation can be reversed :
• On request at the time the order is placed. In this case,
the pump will be supplied with clockwise rotation.
• Manually, by referring to the relevant §.
It is also possible to order a reversible-direction MOUVEX
P BI series pump which can be operated in either direction.
REGARDLESS OF THE INTERNAL DESIGN OF THE PUMP,
THE DIRECTION OF ROTATION SHOULD NOT BE CHAN-
GED UNTIL THE PUMP HAS COME TO A COMPLETE STOP.
2.6 Protecting the system against overpres-
sure
It is recommended that a safety device be used to pro-
tect the system from overpressures.
The standard pump is supplied fitted with a single
bypass to protect the system in one operating direction.
This is to say that its orientation is a function of the ope-
rating direction of the pump (see § BYPASS).
It is also possible to order the following options :
• Bypass clamp : the pump then has no other integrated
safety device. In that case, it is strongly recommended
to install a pressure switch to limit any overpressure.
• Double bypass : Here, the pump is fitted with an inte-
grated safety device to protect the system in both
directions of operation.
If the pump is to be used in both directions of rotation
(whatever the operating conditions), it is recommended
that a device (pressure switch, double bypass, etc.) be
used to protect the pump from overpressures, whatever
the direction of operation.
2.7 Cleaning
Since the pumps are delivered well greased, they must
be cleaned before starting them up (especially when
transferring food products, for example).
Cleaning can be done either by circulating an appropria-
te liquid, or by removing the front cover of the pump and
carefully cleaning the internal parts (to do so, refer to the
section on pump maintenance).
Counterclockwise direction of rotation
WARNING
INCORRECT SETTINGS OF THE PRES-
SURE RELIEF VALVE CAN CAUSE PUMP
COMPONENT FAILURE, PERSONAL INJURY,
AND PROPERTY DAMAGE.
Hazardous pressure
can cause
personal injury
or property damage.
WARNING
FAILURE TO INSTALL ADEQUATELY SIZED
PRESSURE RELIEF VALVE(S) CAN CAUSE
PROPERTY DAMAGE, PERSONAL INJURY
OR DEATH.
Hazardous pressure
can cause
personal injury
or property damage.
CAUTION
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NT 1008-D00 08 18 P BI series e
2. INSTALLATION (continued)