Electric Motor Installation; Flexible Joint Coupling; Check And Change The Direction Of Rotation; Design Data Check - OBL X9 Series Operating Manual

X9 Series metering pumps
6.5

ELECTRIC MOTOR INSTALLATION

Unless otherwise agreed, the pumps are always supplied complete with an electric motor.
For pumps explicitly ordered without motor ("M0" pump code ending) technical requirements to be met are defined during negotiations.
NON ATEX pumps supplied without a motor (pump code ending in "M0"), it is the end user's responsibility to
install a motor with power, rotational speed and coupling type that meet the technical requirements.
For ATEX pumps supplied without a motor (codes ending in "M0"), in addition to the above, it is the end user's
GB
responsibility to verify and install a suitable motor for the zone classification and characteristics of flammable
substances present in the plant.
OBL DISCLAIMS ALL RESPONSIBILITY FOR DAMAGES TO PERSONS OR PROPERTY CAUSED BY
IMPROPER INSTALLATION OF MOTORS.
6.5.1

Flexible joint coupling

Motor coupling on the pump is performed by means of a BoWex flexible joint. Clean the end of the shaft, lubricate it with oil and then
carefully proceed to assemble the half-coupling without banging and with maximum caution.
6.5.2

Check and change the direction of rotation

At first start-up of the pump, the direction of rotation of the motor should be checked by authorised, experienced and qualified
personnel. An arrow on the motor indicates the correct direction of rotation.
To reverse the direction of rotation of the motor, exchange the two motor power phase cables. Re-check the
motor direction of rotation after this activity.
6.6

DESIGN DATA CHECK

Make sure that pump is suitable for working in the actual operating conditions by checking the following:
6.6.1

Environmental conditions

a) ambient temperature: check that the actual ambient temperature is consistent with pump characteristics
b) altitude: pump suction performances could be influenced by atmospheric pressure. Check the real NPSH(a) available (of the
plant) in relation to the NPSH(r) required of the pump.
6.6.2

Installation conditions

a) pump installation and operation should only be carried out under the conditions defined at time of order.
b) for ATEX pumps: pump classification (group and category) and the temperature class must be suitable for the installation
area classification.
Special operating conditions, differing from normal conditions, must always be defined at time of the order, to
prevent the pump from working under conditions which may affect proper functioning and compromise safe operation.
6.7

START-UP

Carry out the first start-up with stroke adjustment at 20% and with the lowest discharge pressure possible; maintain these conditions
for at least 5 minutes. Gradually increase the adjustment up to 100%, then place it in the condition required by the process.
During this initial phase, check with a pressure gauge (see "Discharge pipeline - Pressure gauge") the actual pump working pressure.
Such value (pointer max. oscillation) must never exceed the maximum pressure value indicated on the pump nameplate.
6.7.1

Checks before start-up

Before starting up the pump check the following:
a) that there are no product leakages from pump connections nor pipelines plant, especially along the discharge side
b) the lubricant oil conditions by means of the oil level indicator, see "Lubricant oil check"
c) the hydraulic oil systems conditions by means of the tank cover, see "Hydraulic system oil check"
d) the direction of rotation of the motor and that it is protected as provided for by regulations, see "Electric motor installation"
e) in case of power supply via inverter, that pump has been purchased for said use and that the actual power frequency range
complies with the range of frequency from 30Hz to 80Hz allowed and defined by OBL
f) correct installation of all possible accessories and their proper operation
g) that ON-OFF valves along the discharge and suction pipelines are open or closed depending on their function
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Operating manual
File: UT-4336 – Rev.0