Product Description | 2
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2.1 Operating Principle
The machine works on the claw principle.
The MINK is fully air-cooled thanks to an integrated fan in the drive unit.
2.2 Application
The machine is intended for the suction of air and other dry, non-aggressive, non-toxic
and non-explosive gases.
Conveying of other media leads to an increased thermal and/or mechanical load on
the machine and is permissible only after a consultation with Busch.
The machine is intended for the placement in a non-potentially explosive environment.
The machine is not capable of maintaining ultimate pressure.
– The minimum allowed ultimate pressure is to be read from the nameplate of
the machine.
– By means of process control and/or vacuum relief valves it must be made sure
that the minimum allowed ultimate pressure will not be underrun.
The machine is suitable for continuous operation up to a certain suction pressure in-
dicated below:
Machine type
Suction pressure limitation for continuous operation
MM 1202 AV
200 hPa (mbar) abs.
MM 1252 AV
MM 1322 AV
MM 1324 AV
60 hPa (mbar) abs. = ultimate pressure
The operating time of the following machines is limited to 20 minutes at ultimate pres-
sure:
Machine type
Suction pressure
MM 1202 AV
100 hPa (mbar) abs. = ultimate pressure
MM 1252 AV
MM 1322 AV
150 hPa (mbar) abs. = ultimate pressure
Cooling time:
The machine must cool for at least the same time as the ultimate pressure operation,
at a suction pressure range of 200 to 1000 hPa (mbar).
For example : 20 min of operation = 20 min of cooling time
In order to avoid reverse rotation after switching off, the machine is equipped with a
non-return valve (NRV).
Note:
The non-return valve (NRV) is no reliable means to prevent suction and shall
not be used as a non-return valve or shut-off valve for the system.
In case the machine shall be maintained after shutdown:
