Edwards Vacuum A73001983 XDS35i Small Dry Scroll Pump NGB 100-120/200-230V 1 ph 50/60Hz set to 230V

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Scroll pumps are an excellent alternative to rotary vane pumps where oil free pumping is desirable. The XDS pumps in particular use an innovative bearing shield to isolate the vacuum environment from all forms of lubricant not only making them totally dry, but also protecting the bearing from any process gases. Vapour handling is enabled by an adjustable gas ballast; this allows the range of pumps to satisfy many applications that were previously off limits to other scroll pumps.

Technical Data

Displacement 50 or 60Hz
43 m3h-1 / 25 ft3min-1
Peak pumping speed 50 or 60Hz
35 m3h-1 / 21 ft3min-1
Ultimate vacuum (Total pressure)
1 x 10-2 mbar / 8 x 10-3 Torr
Max inlet pressure for water vapour
35 mbar / 23 Torr
Max water vapour pumping rate – GB I
70 gh-1
Max water vapour pumping rate – GB II
240 gh-1
Max allowed outlet pressure
0.2 bar gauge / 2.9 psig*
Max allowed inlet and GB pressure
0.5 bar gauge / 7 psig
Motor power
Power connector
IEC EN60320 C19
Nominal rotation speed
1750 rpm
48 kg / 105 lb
Inlet flange
Exhaust flange
Noise level
57 dB (A)
-1 (rms)
Leak tightness (static)
-6 mbar ls-1
Operating temperature range
10 to 40 °C / 50 to 104 °F

* 1 bar gauge / 14 psig for short period of time only

Features and Benefits

Lubricant-free within the vacuum envelope and hermetically sealed means a totally clean and dry vacuum to prevent cross contamination.
No atmosphere to vacuum shaft seals means bearings are completely isolated, this prevents process attack and enable the bearings to run cooler and last longer.
No oil to change eliminating cost of contaminated oil disposal.
Simple single sided scroll design allows maintenance to be done in minutes for low cost of ownership and maximum up‑time.
Inverter drive for consistent pumping speeds worldwide.
Pump range includes 35 and 40 m3h-1.
  • £8777.00

XDS scroll pumps have become industry standard when dry pumping is essential, proving to be a robust and clean vacuum pump solution in a range of applications and processes.

The XDS35i pump has an innovative bearing shield that isolates the vacuum environment from all forms of lubricant, making it not only lubricant-free but hermetically sealed. XDS35iNGB variant has had the gas ballast feature removed for applications such as rare gas recirculation and gas recovery.

The XDS46i shares many of the same features of the XDS35i but with a peak speed of 40 m3h-1. The pump has been optimised for maximum pumping speed at inlet pressures between 1 mbar and 10 mbar, making it ideally suited for LCMS and ICPMS applications requiring higher pumping speeds.

The C variant has been modified so that it is more suitable for use on vapour handling processes and may be used in some applications using corrosive substances. The C version is fitted with Chemraz® internal valve pads and stainless steel exhaust port.

Chemraz® is a registered trademark of Greene Tweed



Scroll pumps use intermeshing fixed and orbital scrolls to form non-contacting, crescent shaped gas pockets that are continuously compressed by the orbiting action. This means that, unlike oil-sealed rotary pumps, there is no sealant or lubricant required in the swept volume of the pump.


• Automotive; brake line and air conditioning evacuation
• Backing turbomolecular  pumps
• Chemical applications including gel dryers and solvent recovery
• Coating systems
• High energy physics
• Mass spectrometry
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  • Manufacturer
    Edwards Vacuum
  • Country of Origin
    Czech Republic