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In case of very long connection lines it is advisable to use larger line sizes in order to
avoid a loss of efficiency. Seek advice from your Busch representative.
5.2.1 Suction Connection
WARNING
Unprotected suction connection.
Risk of severe injury!
• Do not put hand or fingers in the suction connection.
NOTICE
Intruding foreign objects or liquids.
Risk of damage to the machine!
In case of the inlet gas contains dust or other foreign solid particles:
• Install a suitable filter (5 micron or less) upstream the machine.
Connection size:
– DN150 PN16, EN 1092-1
Depending on the specific order, other connection dimensions may apply.
If the machine is used as part of a vacuum system:
• Busch recommends the installation of an isolation valve in order to prevent the oil
from flowing back to the vacuum system.
5.2.2 Discharge Connection
CAUTION
The discharge gas contains small quantities of oil.
Risk to health!
If air is discharged into rooms where persons are present:
• Make sure that sufficient ventilation is provided.
Connection size:
– DN125 PN16, EN 1092-1
Depending on the specific order, other connection dimensions may apply.
• Make sure that the discharged gas will flow without obstruction. Do not shut off or
throttle the discharge line or use it as a pressurised air source.
Unless the aspirated air is discharged to the environment right at the machine:
• Make sure that the discharge line either slopes away from the machine or provide a li-
quid separator or a drip leg with a drain cock, so that no liquids can flow back into the
machine.
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