Abbey Machinery Slurry Tanker, Maintenance, Operating Instructions And Spare Parts List, Page: 39 / 72

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7.0 THE VACUUM PUMP (Con’d)
7.1.4 OIL REGULATION FOR LUBRICATION
To regulate the oil fall, as from the above mentioned table, on the pump with force feed lubrication it
is sufficient to operate on the regulation unit nut “A” (Fig. 5) after having loosened the nut “B”.
Fig.5 Fig.6
When the regulation is finished clasp again the nut”B”.
Oil delivery regulation, on the automatic, lubrication is made in our factory during final test of the
vacuum pump.
7.1.5. OVERPRESSURE AND VACUUM CONTROL VALVES
Pressure: The max. pressure allowed is 1.5 BAR on the pump.
To keep this valve and to obtain a lower max.pressure Abbey have fitted a dimensional overpressure
valve to release the air capacity in excess of 0.5 BAR.
CAUTION: This valve is factory set but should be checked at regular intervals to ensure the max.
pressure isn’t exceeded. See section 8 for setting.
Vacuum: Too high a vacuum can cause ovalization and waving of the body or vane breakage. For this
reason we suggest the use of a vacuum control valve.
7.1.6. RUNNING TIME
The max. running time we suggest is not over 6-8 minutes.
A longer utilisation time without interruption can cause overheating and also vane damage.
If the utilisation time is extended owing to the density of material to suck, it is necessary to thin or
mix the material.
7.1.7. Hydraulic Drive oil flow rates
The oil flow requirement for an hydraulic driven Vacuum pump is:

64Ltr/min for Mec9,000 to reach 12000rpm

107Ltr/min for Mec11,000 & Mec13,500 to reach 1200rpm
Overpressure Valve
Vacuum Control Valve