Features:
- Lubricant-free within the vacuum envelope and hermetically sealed means a totally clean and dry vacuum to prevent cross contamination.
- Advanced scroll-form and tip-seal technologies deliver best in-class vacuum performance and unrivaled ultimate vacuum levels.
- Unique tip seal design significantly reduces wear to minimize maintenance and extend service life.
- Quiet operation with typical noise during operation < 52 dB(A) for minimal environmental impact.
- Advanced interface providing a variety of traditional and analogue and digital control methods enabling remote control/monitoring via RS232 or RS485.
- Integrated inverter drive with auto sensing input delivers optimized pumping performance globally.
Models Features:
- nXDS-C has been modified so that it is more suitable for use on vapour handling processes and may be used in some applications involving corrosive substances. This chemically resistant version is fitted with Chemraz® internal valves and stainless steel fittings.
- nXDS-R Version has the gas ballast blanked off so it cannot be accidentally opened. This is useful for applications such as rare gas recirculation or gas recovery.
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XDS35iE(C/R)
- Equipped with patented technology that prevents over-compression within the scroll mechanism at high operational pressure and large throughput applications.
- Twin by-pass valves release sufficiently compressed gas directly to the pump exhaust, increasing efficiency, lowering power consumption and enhancing pumping speed.
- Valve operation occurs at inlet pressures greater than 300 mbar, making this pump tailored to applications that dwell at higher pressures.
- The elimination of over-compression at high operational pressure, reduces power consumption and diminishes bearing loads, extending bearing live.
Applications:
- Backing turbomolecular pumps
- Chamber evacuation
- Chemical applications including gel dryers and solvent recovery
- Electron microscopy
- High energy physics
- Mass spectrometry
Videos

Edwards nXDS - the great new shape of dry vacuum pumping
The nXDS is up to 20 times quieter than other pumps. Its intelligent control functions and up to five year service interval offer low cost of ownership, making it the small dry pump of choice for today's most advanced technologies.
Runtime: 1:09
Specifications Table
Pump Model | nXDS6i(C/R) | nXDS10i(C/R) | nXDS15i(C/R) | nXDS20i(C/R) | XDS35i(C/R) | XDS35iE(C/R) |
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Pumping Speeds |
50 (Hz)
3.65 CFM 103 L/min 1.72 L/s 6.20 m3/hr
60 (Hz)
3.60 CFM 101 L/min 1.69 L/s 6.12 m3/hr |
50 (Hz)
6.71 CFM 190 L/min 3.17 L/s 11.4 m3/hr
60 (Hz)
6.70 CFM 189 L/min 3.15 L/s 11.4 m3/hr |
50 (Hz)
8.89 CFM 251 L/min 4.19 L/s 15.1 m3/hr
60 (Hz)
8.90 CFM 252 L/min 4.18 L/s 15.1 m3/hr |
50 (Hz)
12.9 CFM 366 L/min 6.11 L/s 22.0 m3/hr
60 (Hz)
13.0 CFM 368 L/min 6.11 L/s 22.1 m3/hr |
50 (Hz)
20.6 CFM 582 L/min 9.70 L/s 35.0 m3/hr
60 (Hz)
20.6 CFM 582 L/min 9.70 L/s 35.0 m3/hr |
50 (Hz)
20.6 CFM 582 L/min 9.70 L/s 35.0 m3/hr
60 (Hz)
20.6 CFM 582 L/min 9.70 L/s 35.0 m3/hr |
Max Water Vapor Pumping Rate (with gas ballast) |
110 g/hr | 145 g/hr | 280 g/hr | 220 g/hr | 240 g/hr | 240 g/hr |
Ultimate Pressure |
Total With Gas Ballast
5.00 x 10-2 hPA 5.00 x 10-2 mbar 5.00 Pa 3.75 x 10-2 Torr
Total Without Gas Ballast
2.00 x 10-2 hPA 2.00 x 10-2 mbar 2.00 Pa 1.50 x 10-2 Torr |
Total With Gas Ballast
4.00 x 10-2 hPA 4.00 x 10-2 mbar 4.00 Pa 3.00 x 10-2 Torr
Total Without Gas Ballast
7.00 x 10-3 hPA 7.00 x 10-3 mbar 7.00 x 10-1 Pa 5.00 x 10-3 Torr |
Total With Gas Ballast
4.00 x 10-2 hPA 4.00 x 10-2 mbar 4.00 Pa 3.00 x 10-2 Torr
Total Without Gas Ballast
7.00 x 10-3 hPA 7.00 x 10-3 mbar 7.00 x 10-1 Pa 5.00 x 10-3 Torr |
Total With Gas Ballast
6.00 x 10-2 hPA 6.00 x 10-2 mbar 6.00 Pa 4.50 x 10-2 Torr
Total Without Gas Ballast
3.00 x 10-2 hPA 3.00 x 10-2 mbar 3.00 Pa 2.20 x 10-2 Torr |
Total With Gas Ballast
2.00 x 10-2 hPA 2.00 x 10-2 mbar 2.00 Pa 1.50 x 10-2 Torr
Total Without Gas Ballast
1.00 x 10-2 hPA 1.00 x 10-2 mbar 1.00 Pa 8.00 x 10-3 Torr |
Total With Gas Ballast
4.00 x 10-2 hPA 4.00 x 10-2 mbar 4.00 Pa 3.00 x 10-2 Torr
Total Without Gas Ballast
3.00 x 10-2 hPA 3.00 x 10-2 mbar 3.00 Pa 2.25 x 10-2 - 3.00 x 10-2 Torr |
Motor Power HP (kW) | 0.35 ( 0.26 ) | 0.38 ( 0.28 ) | 0.40 ( 0.30 ) | 0.35 ( 0.26 ) | 0.80 ( 0.60 ) | 0.70 ( 0.52 ) |
Inlet Flange | KF25 |
KF25 |
KF25 |
KF25 |
KF40 |
KF40 |
Exhaust Flange | KF25 |
KF25 |
KF25 |
KF25 |
KF25 |
KF25 |
Noise db(A) | 52.0 | 52.0 | 52.0 | 52.0 | 57.0 | 57.0 |
Compression Stages | 1 |
1 |
1 |
1 |
2 |
2 |
Weight Lbs (kg) | 58.0 ( 26.2 ) | 57.0 ( 25.8 ) | 56.0 ( 25.2 ) | 56.0 ( 25.6 ) | 105 ( 48.0 ) | 105 ( 48.0 ) |
Dimensions in. (mm.) | 17.0 x 10.4 x 11.3 (432 x 265 x 286 ) | 17.0 x 10.4 x 11.3 (432 x 265 x 286 ) | 17.0 x 10.4 x 11.3 (432 x 265 x 286 ) | 17.0 x 10.4 x 11.3 (432 x 265 x 286 ) | 18.7 x 13.1 x 15.6 (476 x 333 x 397 ) | 18.7 x 13.1 x 15.6 (476 x 333 x 397 ) |
Lubrication Type | Dry |
Dry |
Dry |
Dry |
Dry |
Dry |
Technology Type | Scroll |
Scroll |
Scroll |
Scroll |
Scroll |
Scroll |
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Ordering Table
(Click column headers to sort data)
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Pump Model | Inlet Flange | Voltage & Phases | Manual | Description | Part Number | Price | In Stock | Add To Cart | Accessories | |
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Pump Model | Inlet Flange | Voltage & Phases | Manual | Description | Part Number | Price | In Stock | Add To Cart | Accessories | |
XDS35i(C/R) | KF40 | 100-240 VAC, 50/60 Hz, 1-Ø |
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PUMP, |
A73001983 | $16,583.00 |
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XDS35iE(C/R) | KF40 | 100-240 VAC, 50/60 Hz, 1-Ø |
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EDWARDS XDS35iE SCROLL PUMP, |
A73003983 | $17,743.72 |
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XDS35i(C/R) | KF40 | 100-240 VAC, 50/60 Hz, 1-Ø |
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SCROLL PUMP, |
A73006983 | P.O.R. |
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XDS35iE(C/R) | KF40 | 100-240 VAC, 50/60 Hz, 1-Ø |
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EDWARDS XDS35iE-NGB SCROLL PUMP, |
A73007983 | P.O.R. |
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XDS35iE(C/R) | KF40 | 100-240 VAC, 50/60 Hz, 1-Ø |
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EDWARDS XDS35iCE SCROLL PUMP, |
A73008983 | $18,472.30 |
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nXDS6i(C/R) | KF25 | 100-240 VAC, 50/60 Hz, 1-Ø |
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PUMP, |
A73501983 | $7,808.00 |
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nXDS6i(C/R) | KF25 | 100-240 VAC, 50/60 Hz, 1-Ø |
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PUMP, |
A73502983 | $8,490.71 |
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nXDS6i(C/R) | KF25 | 100-240 VAC, 50/60 Hz, 1-Ø |
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SCROLL PUMP, |
A73503983 | P.O.R. |
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nXDS10i(C/R) | KF25 | 100-240 VAC, 50/60 Hz, 1-Ø |
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PUMP, |
A73601983 | $9,759.00 |
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nXDS10i(C/R) | KF25 | 100-240 VAC, 50/60 Hz, 1-Ø |
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PUMP, |
A73602983 | $10,445.00 |
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nXDS10i(C/R) | KF25 | 100-240 VAC, 50/60 Hz, 1-Ø |
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SCROLL PUMP, |
A73603983 | P.O.R. |
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nXDS15i(C/R) | KF25 | 100-240 VAC, 50/60 Hz, 1-Ø |
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PUMP, |
A73701983 | $11,715.00 |
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nXDS15i(C/R) | KF25 | 100-240 VAC, 50/60 Hz, 1-Ø |
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PUMP, |
A73702983 | P.O.R. |
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nXDS15i(C/R) | KF25 | 100-240 VAC, 50/60 Hz, 1-Ø |
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SCROLL PUMP, |
A73703983 | P.O.R. |
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nXDS20i(C/R) | KF25 | 100-240 VAC, 50/60 Hz, 1-Ø |
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PUMP, |
A73801983 | P.O.R. |
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nXDS20i(C/R) | KF25 | 100-240 VAC, 50/60 Hz, 1-Ø |
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SCROLL PUMP, |
A73802983 | P.O.R. |
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nXDS20i(C/R) | KF25 | 100-240 VAC, 50/60 Hz, 1-Ø |
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SCROLL PUMP, |
A73803983 | P.O.R. |
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Accessories Table
Description | For Pump Model(s) | Accessory Type | Part Number | Price | In Stock | Add To Cart | |
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Description | For Pump Model(s) | Accessory Type | Part Number | Price | In Stock | Add To Cart | |
Auto-Soft Flow Actuated Check Valve (KF40) | XDS35i, XDS35iC, XDS35iE |
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Clamping Kit, For QF25 Flange, Including Aluminum Clamp and FKM Centering Ring | nXDS10i(C/R), nXDS15i(C/R), nXDS20i(C/R), nXDS6i(C/R) |
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Clamping Kit, For QF40 Flange, Including Aluminum Clamp and FKM Centering Ring | XDS35i(C/R), XDS35iE(C/R) |
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KJLC 300 Convection Enhanced Pirani, KF16 | All nXDS Series Pumps |
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Power Supply, KJLC 275i or 300, US Plug End | All nXDS Series Pumps |
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Mains Cable with flying leads for single phase pumps, 2m length | All nXDS Series Pumps |
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Mains Cable with NEMA 5-15 (N.A. / Japan) Plug for single phase, 2m length | All nXDS Series Pumps |
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Mains Cable with CEE 7.7 Plug (Northern Europe) for single phase pumps, 2m length | All nXDS Series Pumps |
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Mains Cable with Type G (UK) Plug for single phase pumps, 2m length | All nXDS Series Pumps |
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Edwards exhaust silencer for nXDS and XDS pumps (KF25 Flange) | All nXDS Series Pumps |
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Edwards Gas Ballast Adaptor Kit for nXDS Pumps | All nXDS Series Pumps |
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Edwards Pump Extension Cable, 2m Length | All nXDS Series Pumps |
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Edwards nXDS Tip Seal Replacement Kit | All nXDS Series Pumps |
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Edwards exhaust silencer for nXDS and XDS pumps (KF25 Flange) | XDS5 & XDS10 |
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Tip Seal Kit | XDS5 & XDS10 | — |
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Edwards exhaust silencer for XDS35i (KF40) | XDS35I |
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Tip Seal Kit | XDS35I | — |
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Mains Cable with flying leads for single phase pumps, 2m length | All XDS Series Pumps |
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Mains Cable with NEMA 5-15 (N.A. / Japan) Plug for single phase, 2m length | All XDS Series Pumps |
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Mains Cable with CEE 7.7 Plug (Northern Europe) for single phase pumps, 2m length | All XDS Series Pumps |
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Mains Cable with Type G (UK) Plug for single phase pumps, 2m length | All XDS Series Pumps |
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