VARISCO GS Series, Operating And Maintenance Manual

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Pompa ad ingranaggi - Serie GS, GK
Gear pump - GS, GK Series
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4.6.3 Fastening screw torques
The fastening torque for the screws of our pumps shall be:
- for M6 screws 11÷12 Nm
- for M8 screws 20÷22 Nm
- for M10 screws 38÷40 Nm
For more detailed information, contact our Technical Department.
5. COMMISSIONING, OPERATION, SHUTDOWN
5.1 DOCUMENTATION
Operating and maintenance manual
5.2 PUMP PREPARATION FOR STARTUP
5.2.1 Filling / discharge
To prevent gears from running dry, before starting the pump for the first time or after long
stationary periods it is advisable to fill the gear spaces with oil or liquid being pumped
through one of the nozzles and rotate the driving shaft by operating manually with a screw-
driver on the motor cooling fan. This also makes it possible to check for even and smooth
movement of rotary components and excessive friction.
The pump discharge, in case of toxic, noxious or, in any case, dangerous fluid, shall take
place according to all the necessary cautions. In particular, the pump body shall be emptied
according to proper operating maneuvers.
5.2.2 Electrical connections
It is necessary to choose wires which satisfy the operating conditions required by the Cus-
tomer (e.g. voltage, current, electric shock protection, bundle of cables) and can support ex-
ternal influences (e.g. ambient temperature, presence of water or corrosive substances, me-
chanical stresses, fire hazards). Moreover, we remind that wires must be properly sized to
ensure the voltage drop from the power supply inlet to the point of load application does not
exceed 4%.
5.2.3 Verifying the direction of rotation
Open the intake and discharge valves. To verify the direction of rotation run the motor for a
while only to check that the pump rotates in the direction marked by the arrows.
5.3 SAFETY DEVICES
5.3.1 Mechanical safety devices (guards for rotating parts)
The hazardous area, represented by the projecting sections of pump side and motor side
shafts and the coupling, shall be protected against accidental contact using bellhousing,
which must be firmly secured both to the motor and to the pump or using a duly shaped
strong metal coupling guard, which must be firmly secured to the baseplate.