DWS 200 without motor, for IEC motor 50 Hz (e.g. Europe), water-cooled

Atlas Copco DWS 200 – robust screw vacuum pump for industry

The DWS 200 reaches a pumping speed of up to 210 m³/h and an ultimate pressure below 0.05 mbar(a). At ultimate pressure it draws 4.1 kW, at full pumping capacity 6.4 kW (motor 5.5 kW, IE3). Dimensions 1163 × 497 × 567 mm (L × W × H, water-cooled; air-cooled 1610 mm long), inlet DN 63 ISO-F, outlet DN 40 ISO-KF.

Tapered screws with variable pitch

The heart of the DWS range is two dry-running screw rotors whose profile combines parallel and tapered sections. The gas is compressed gradually along the rotors; this lowers power consumption and temperature and makes the pump insensitive to particles and liquid from the process. Shaft seal purge and gas ballast provide additional protection and extend the service intervals.

Applications of the range

Atlas Copco lists the manufacture of lithium-ion batteries and solar cells, plastics extrusion, automotive painting, heat treatment and brazing, pharmaceuticals, freeze drying, the coating of industrial glass and thin-film processes.

Variants of the DWS 200

The DWS 200 is available from Ehrler & Beck as a water-cooled and as an air-cooled version for the markets Europe and China (400 V 50 Hz, IEC), USA (230/460 V 60 Hz, cUL/UL), Asia (200/380 V 50 or 60 Hz) and Canada (575 V 60 Hz, cUL/UL), and also without motor with IEC motor flange (50 Hz) or NEMA motor flange (60 Hz, North America). With the matching adapter it becomes the backing pump of a DRB or ZRS booster pump.

Features of the DWS range

• Tapered screw rotors with variable pitch (hybrid profile of parallel and tapered sections): high pumping capacity with a small footprint and low energy demand
• Dry, oil-free pumping chamber – no contaminated oil that has to be disposed of
• Robust water cooling system; DWS 200 and 300 also available air-cooled (indirect cooling)
• Shaft seal purge and gas ballast with atmospheric air extend the service intervals where particles and condensate are present
• Directly flanged motor, versions for all regions; also available without motor
• Dedicated accessories: silencers, non-return valves, transmitters and brackets for DRB and ZRS booster pumps
• Protection class IP54, ATEX-certified variants also available (on request)

Pumping speed 50Hz	210
Pumping speed 60Hz	210
Ultimate pressure	0.05
Length	116.3
Width	49.7
Height	56.7
Inlet connection flange	DN 63 ISO-F
Outlet connection flange	DN 40 ISO-KF
Noise level	72 dB(A)
Cooling method	Air cooling, Water cooling
Oil type	PRIME 100

Additional technical data