Gardner Denver RFL Series, Owner'S Manual

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RFL-7-500 Page 22
7.2.2 Ventilation Valve
The ventilation valve is the regulator for a vacuum system.
When the preset vacuum is reached, it opens and allows the vacuum pump to draw in additional atmospheric air.
We recommend the installation of the vacuum meter on the suction port.
Check weekly for proper functioning by observing the vacuum meter on the suction port or the compressor/vacuum pump.
7.2.3 Checking Intervals
The vacuum must not fall below the operating vacuum for continuous operation!
7.3 Possible Operating Errors
Operating errors can lead to machine failure.
The following must be avoided:
•
Rotation speeds too high or too low (see section 7.2 or Rating Plate),
•
Pressure too high (see section 7.2 or Rating Plate),
•
Expelling the entire volume via the safety valve when the pressure line is closed,
•
Vacuum too low (see section 7.2 or Rating Plate),
•
Compressed air temperature too high (see section 7.2 ),
•
Poor cooling (cooling air supply blocked),
•
Clogged vacuum intake filter,
•
Blocked exhaust silencer,
•
Intake of fluids,
•
Intake of water as a result of failing to drain the condensate from safety vessels according to the maintenance schedule
(danger of freezing in winter),
•
Insufficient lubricating oil,
•
Inappropriate lubricating oil.
Checking Intervals
See Section During operation
every 10-20 mins After each
operation Daily Weekly
Operating Rotation Speed 7.2
•
Operating Pressure/Vacuum Rating Plate
•
Air Discharge Temperature 7.2
•
Drain Condensate (contains oil!) 7.2
•
Silencer/Oil Separator
•
•
Safety Tank
•
Check Oil Level 7.2, 6.7
•
Activate Safety Valve 7.2.1
•
Check Ventilation Valve 7.2.1
•
Clean Machine
•
Clean Inlet/Outlet Openings for
Cooling Air
•
Check grilles for any blockages
•