Edwards XDS35iC 25cfm Chemical-Resistant Scroll Pump w/ silencer

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UL, CSA, CE, ATEX certified, 110V/220V switchable. 8 micron ultimate vacuum, adjustable gas ballast, 520 watts


SKU: 842 Categories: ,


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.


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

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.



Power 100-120V or 200-230V switchable
Displacement / peak pumping speed (50/60Hz) 43 m3h-1 / 25 ft3min-1
35 m3h-1 / 21 ft3min-1
Ultimate vacuum (Total pressure)
Max continuous inlet pressure
1 x 10-2 mbar / 8 x 10-3Torr
35 mbar / 23 Torr
Max water vapour pumping rate – GB I / GBII 70 gh-1 / 240 gh-1
Max continuous outlet pressure 0.2 bar gauge / 2.9 psig
Max allowed inlet and GB pressure 0.5 bar gauge / 7 psig
Motor power / speed 0.52kW / 1750 rpm
Power connector IEC EN60320 C19
Weight 48 kg / 105 lb
Inlet flange / Exhaust flange NW40 / NW25
Noise and vibration 57 dB (A),  <4.5mms -1 (rms)
Leak tightness (static) <1 x 10-6 mbar ls-1
Operating temperature range 10 to 40 °C / 50 to 104 °F
Compliance CE, UL, CSA, ATEX



What is included in this package

 Part description


Part image

 Edwards XDS35iC oil free scroll vacuum pump (KF40 inlet & KF25 outlet)
1 pc

 KF40 quick clamp & centering ring x 2, KF25 quick clamp & centering ring x 1
3 sets

 KF40 flexible stainless steel bellow – 3.3 ft
1 pc  
 Stainless steel KF40 to KF25 adatper 1 pc
 Edwards silencer for XDS35iC or XDS46iC (KF25 connection)
1 set

 Power cord
1 pc
 User’s manual in a CD
1 pc

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