GA01300_0902 - 04/2006 - © by Leybold Vacuum
24
In cyclic operation, the TRIVAC BCS should not be switched off during the
intervals between the individual working phases (power consumption is
minimal when the pump is operating at ultimate pressure), but should con-
tinue to run with gas ballast valve open and intake port closed (if possible
via a valve).
Once all vapours have been pumped off from a process (e.g. during dry-
ing), the gas ballast valve can be closed to improve the attainable ultimate
pressure.
4.2.3
Operating Temperature
Proper operation of the TRIVAC BCS is ensured in the ambient temperatu-
re range between 12 °C (55 °F) to 40 °C (104 °F).
At operating temperature, the surface temperature of the oil case
may lie between 40 °C (104 °F) and over 100 °C (212 °F), depen-
ding on the load.
There is the danger of receiving burns.
If – due to the ambient conditions – this temperature range is exceeded at
either end of the range, then the operating range of the TRIVAC BCS can
be adapted. The Leybold sales department will be pleased to answer any
questions in this matter.
4.3
Switching Off / Shutdown
Since the TRIVAC BCS pump will commonly be exposed to aggressive and
corrosive media, we recommend that you let the pump continue to opera-
te even during long non-working intervals (e.g. overnight) with the intake
line closed and the gas ballast valve open. This avoids corrosion during idle
periods and difficulties when re-starting the pump under conditions where
the lubricant has been chemically modified.
When pumping condensable media let the pump continue to ope-
rate with the gas ballast valve open and the intake line closed
before switching off (see Chapter 4.2.2).
When using PFPE as the lubricant you must note the information
given in Operating Instructions GA 07.009 when switching the
pump off or shutting it down for a longer period of time.
If the TRIVAC BCS running with mineral oil is to be shutdown for an exten-
ded period after pumping aggressive or corrosive media or if the pump has
to be stored, proceed as follows:
When pumping harmful substances, take adequate safety pre-
cautions.
Operation
Caution
Warning
Warning
