OMAC B Series, Installation, Operation And Maintenance Manual

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1. INTRODUCTION
This handbook contains the necessary instructions for the right use and maintenance of the OMAC lobe pumps.
Before installing the pumps, you should read and respect carefully the following rules in order to avoid mistakes which
may compromise the performance. For special applications, not covered by these rules, our technical office is at your disposal
for further suggestions.
2. PRELIMINARY CHECKS
1 - Remove the possible protection caps, arranged on the outlet and inlet ports.
2 - Disassemble the front cover and check that inside the pumping body there are no foreign bodies or dust.
3. - Choose the running direction for a right pump positioning. In standard versions the direction is reversible, i.e.: by
inverting the rotation direction the outlet becomes inlet.
4. - Be sure on installation you have respected all the safety measures in use concerning the protections of the running
parts and of the heated parts above 60
°
C with "overheated area" indication. Check also the protections of the "dangerous
area" are no sparking.
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3. INSTALLATION
3.1 - POSITIONING
1 - If the pump is delivered in bareshaft version, the coupling with the motorization should be entrusted to qualified
staff. A joint misalignement can cause a damaging stress, that may produce vibration in the pipeline and accelerated
pump wear.
2 - In choosing the speed, at which the pump must run, consult carefully the chart, given by manufacturer, about
medium viscosity (see technical handbook and table at page 46).
3 - If the pump is delivered with motor, coupling and base, the assembling has been carried out at our works. Anyway
check to see that no damage has occurred during transit.
4 - Where possible we advise you to fix the base to floor; after bolting down, re-check the alignement pump-motor
and correct it, if necessary, by introducing shims under the base.
5 - In some applications height adjustable feet are normally used, because they allow a regular cleaning under the
base.
3.2 - PIPING SYSTEM
1 - OMAC pump suction and discharge are sized to suit passage of even very viscous medium; consequently the
piping should not be necessarly proportionate to them.
2 - The suction and discharge piping should be sized according to the calculus in the technical handbook, considering
the expected capacity, viscosity and friction losses.
3 - The lobe pumps can work with great friction losses in outlet, but not in inlet, where we advise as large and short
piping as possible in order to have a lower NPSH that the available one.