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SAH (01)
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Suitability
The units SAH are suitable for use in the industrial field i.e. the protection equipments corresponds to EN DIN 294 table 4, for people
aged 14 and above.
SAH models can be operated as vacuum pumps or compressors. They are suitable for use with air of a relative humidity up to 90 % but not aggressive
gases. Gas tight versions are available. The tightness of each unit depends on the shaft seal. The shaft seal lifetime relates directly to the operating
conditions.
Dangerous mixtures (i.e. inflammable or explosive gases or vapours), water vapour or aggressive gases must not be handled.
Handling of inflammable or aggressive gases and vapours is only possible with special versions, if the safety instructions XE 1 are noted.
Operation in potentially explosive areas is not permissible.
The ambient and suction temperatures must be between 5 and 40° C. For temperatures outside this range please contact your
supplier.
For less aggressive media an internal protection coating can be utilised.
The maximum permissible pressure difference for vacuum or pressure depends upon the motor rating. This is indicated on the data plate (N) and
is shown in the data sheet for standard voltages and frequency:
SAH 25, SAH 45, SAH 55, SAH 75, SAH 95 see data sheet D 556/ 1 or D 656/ 1
SAH 155, SAH 215, SAH 235 see data sheet D 556/ 2 or D 656/ 2
SAH 275, SAH 355, SAH 505 see data sheet D 556/ 3 or D 656/ 3
Operating above these pressure differences the motor would be overloaded. As well as considering the maximum allowable pressure difference,
the amperage should also be checked against the data plate (N).
The loading of each unit depends on the specific gravity of the gas handled. Therefore when handling gases other than air, there are other pressure
difference limits to be considered. Please contact the supplier for further advice.
If it is possible for the flow to be throttled more than the allowed limits, then the use of vacuum or pressure limitation valves (optional extras) should
be considered.
The maximum permissible internal pressure is 3.5 bar(abs). With this pressure the performance is reduced.
For all applications where an unplanned shut down of the blower could possibly cause harm to persons or installations, the
corresponding safety backup system must be installed.
Handling and Setting up (pictures
Pumps that have reached operating temperature may have a surface temperature at position (Q) of more than 70° C. WARNING! Do
Not Touch.
The blower, especially when the units are built-in, the cooling air entries (E) and the cooling air exits (F) must have a minimum distance of 10 cm
from any obstruction. The discharged cooling air must not be re-circulated.
SAH units can be operated in different positions.
SAH (01) models can be installed on a solid floor without bolting down. When installing SAH (02) models, i.e. motor vertically upwards, you must
secure against torque reaction on start-up. When fitting onto framework we recommend using anti-vibration mounts.
For installations that are higher than 1000 m above sea level there will be a loss in capacity. For further advice please contact your
supplier.
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SAH (02)
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