LEYBOLD VARODRY VD65 - Connect the Pump

5.2.1 Non-conforming use
The pump is not suited for pumping of:
▪ Radioactive substances
▪ Explosive substances
▪ Ignitable gas mixtures
▪ Pyrophoric gases
▪ Liquids
▪ Media in signicant amounts condensing in the pump (Except from
water)
▪ Solids
▪ Corr
osive gases
▪ Toxic gases
5.3 Connect the pump
Remove the caps. We recommend that you retain the caps for
decommissioning of the pump.
▪ During installation work on the intake and discharge lines do not
subject anges to any excessive stresses.
Intake side
▪ At the intake side, connect the pipework to the vacuum chamber.
▪ The intake line must be clean. Deposits in the intake line can degas
and impair the vacuum. The connecting anges must be clean and
undamaged.
Note:
Do not allow the ingestion of any objects (screws, welding beads, nuts,
washers, pieces of wir
e, etc.) through the intake port of the pump.
Exhaust line
DANGER:
The operator must check, whether the pumped gases will lead to safety risks on the
environment if the pump is operated without an exhaust line (i.e. risk of suf
focation,
risk of slipping due to condensing vapours, etc.).
CAUTION:
Smaller cross sections may cause an undesirable overpr
essure within the system. Do
not start the pump with a constricted or blocked exhaust. Ensure that any valves or
blocking devices in the exhaust line are open. Clogged exhaust lines will reduce the
available pumping speed, increase temperature and cause overloading of the pump
motor or a dangerous overpressure within the system. There is the risk of bursting.
The pump can generate pressures up to 1.5 bar (g) at the exhaust, when the
discharge line is shut.
▪ Connect the exhaust line with a hose/pipework to the pump, or when
operating the pump without a connected exhaust line, operate the
pump only in a well ventilated room.
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300766038_002_C3 - 09/2021 - © Leybold
Installation