VARISCO GS Series Operating And Maintenance Manual Download Page 66

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Pompa ad ingranaggi - Serie GS, GK

Gear pump - GS, GK Series

If you have any doubt concerning the operation limits of the pump, please contact:

VARISCO S.r.l.
Via Terza Strada, 9 - 35029 PADOVA - ITALY
Tel. +39 049 8294111
Fax +39 049 8294373
E-mail:

PRELIMINARY REMARK

Here below we will also briefly outline some advice which, even if it does not directly concern
the pump and/or the pump unit, nevertheless can affect, sometimes significantly, its right oper-
ation.

It is clear that the Manufacturer neither can foresee the numberless possible applications in which
pumps can be involved, nor can take into account, in particularly complicated installations, all the
possible interactions that the malfunction of any component can have on the pump operation.
The User, on the basis of the information given by the Manufacturers of the single components (or
of the sub-assemblies) shall however carry out a careful assessment of the

plant risks

and take the

proper further safety measures where they need.

WARNINGS

All  operations  concerning  installation,  commissioning  and  maintenance  must  be  done  by  expert
personnel authorized by the Customer to work on such equipment.
It is Customer’s care, on the basis of the process fluid characteristics, to adopt all the measures in-
cluding  use  of  suitable  Personal  Protective  Equipment  (PPE)  so  that  maintenance  operators  can
work in full safety conditions.

Installation, commissioning, operation

Carefully check that marks stamped on the nameplates of electric motors, of pumps and, if any, of
speed reducers or of hydraulic speed variators, correspond with the category and the tempera-
ture class required.

Read carefully the instructions of the operating handbook of the pump, these supplementary in-
structions and further possible instructions provided by the Manufacturers of the mechanical seal
or magnetic coupling, of the flexible coupling, of the electric motor, of the speed reducer or of the
hydraulic speed variator.

Attend to the connection of motors and pumps to the earth circuit. In case, use the arrangements
fitted on the motor frame and on the rear cover of the pump (yellow screw).

Check the right alignment between pump and electric motor, following the instructions of the op-
erating handbook of the pump and the warnings of the Manufacturer of the flexible coupling or of
the magnetic coupling.

Be sure that pipes have proper inner diameters (on the suction side, in particular, inner diameter
must not be less than the nominal value of the pump connection), there is no syphon in piping at
suction side and there are not air admissions.

Wherever foreseen, check the connection of the thermocouples and of their related accessories
with detecting equipment and with alarm signal and stop device of the pump and of the motor

We remind you that every protection device, safety component and safety, control and regulat-
ing device installed by the Customer, must be in accordance with requirements of the directive

ATTENTION