Characteristics
DWS 750 VSD+ DWS 450 VSD+ Unit
Typical vibration level at inlet < 1.5 mm/s
Pump inlet flange (bolted) ISO100 -
Exhaust gas outlet
NW50
‡
-
Lubricant volume
2.8 1.8 litre
0.62 0.4 gallon
* Refer to Installation drawings
on page
80.
‡ Refer to Connect the dry pumping system to the vacuum/exhaust system on
page 86 for information relating to the exhaust size and length for DWS VSD+
dry pumping systems.
3.2. Performance data
Table 3 Performance data
Pump
Characteristics
Typical peak
pumping speed
Ultimate (shaft seal
purge only)
Maximum continuous
inlet pressure
Units
m
3
/h
cfm mbar mbar
DWS 750 VSD+ 740 436
< 1 x 10
-2
1000*
DWS 450 VSD+ 450 265
< 1 x 10
-2
1000*
* Speed may be limited.
3.3. Loading data
Refer to Installation drawings on page 80 for the centre of gravity positions for
dry pumping systems. The loading data in T
able: Loading data is for dry pumping
systems with optional levelling feet and castors.
Table 4 Loading data
Pump
Load at levelling foot position (kg)
1 2 3 4
DWS 750 VSD+ 135 152 152 135
DWS 450 VSD+ 128 138 138 128
Technical data
07/2021 - ©Atlas CopcoPage 161950840208_A
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