Product Description
Use
The vacuum pump is intended for
–
the suction
of
–
air and other dry, non-aggressive, non-toxic and non-explosive
gases
Conveying media with a lower or higher density than air leads to an in-
creased thermal and/or mechanical load on the vacuum pump and is
permissible only after prior consultation with Busch.
Max. allowed temperature of the inlet gas: 40 °C
Standard-version:
The gas shall be free from vapours that would condensate under
the temperature and pressure conditions inside the vacuum pump.
Version “Aqua”:
The vacuum pump features the corrosion protection coating CPC
and is capable of conveying water vapour (
Ú
page 8: Conveying
Condensable Vapours). Conveyance of other vapours shall be
agreed upon with Busch. Conveyance of water or other liquids in
liquid phase increases the power consumption and shall therefore
be avoided (risk of drive overload).
The vacuum pump is intended for the placement in a non-potentially
explosive environment.
Vacuum pumps MM 1324 AV standard-version are thermally suitable
for continuous operation down to ultimate pressure.
Vacuum pumps MM 1324 AV Version “Aqua” are thermally suitable
for continuous operation at intake pressures down to 200 hPa abs
(200 mbar abs). By means of process control and/or vacuum relief
valves it must be made sure that the minimum allowed intake pressure
will not be underrun.
Vacuum pumps MM 1202 AV, MM 1200 AV, MM 1252 AV and
MM 1250 AV are thermally suitable for continuous operation at intake
pressures down to 100 hPa abs (100 mbar abs). By means of process
control and/or vacuum relief valves it must be made sure that the mini-
mum allowed intake pressure will not be underrun.
Vacuum pumps MM 1322 AV and MM 1320 AV are thermally suitable
for continuous operation at intake pressures down to 150 hPa abs
(150 mbar abs). By means of process control and/or vacuum relief
valves it must be made sure that the minimum allowed intake pressure
will not be underrun.
Version “Aqua”:
The safety valve on the vacuum pump protects the vacuum pump
against overheating only. It is not designed for frequent use and
must therefore not be used as a system pressure regulating valve.
Principle of Operation
The vacuum pump works on the claw principle.
The components are dimensioned such, that on the one hand there is
never contact between the two claws or between a claw and the cylin-
der, on the other hand the gaps are small enough to keep the clear-
ance loss between the chambers low.
In order to avoid the suction of solids, the vacuum pump is equipped
with a screen (715) in the suction connection.
In order to avoid reverse rotation after switching off, the vacuum
pump is equipped with a non-return valve (n, 714).
The vacuum pump compresses the inlet gas absolutely oil-free. A lubri-
cation of the pump chamber is neither necessary nor allowed.
MM 1324, 1202, 1252, 1322, 1200, 1250, 1320 AV
Product Description
0870133276 / 070328
page 3
a
Eye bolt
b
Terminal box
c
Directional arrow
d
Cooling air outlet
e
Oil sight glass
f
Oil drain plug
g
Suction connection (with in-
let air filter)
h
Inlet air filter (optional)
i
Cooling air inlet
j
Position of condensate drain
cock (optional for version
“Aqua”)
k
Gas discharge
l
Acoustic enclosure
m Cylinder
n
Rotor
o
Non-return valve
p
Suction connection (without
inlet air filter)
