Edwards nXDS Dry Scroll Pumps
Starting at: $9,147.00 Starting at: $7,134.66
Edwards nXDS Dry Scroll Pumps
With exceptional pumping capability, ultimate vacuum performance and state-of-the-art design features, the nXDS dry scroll pump is the best performing pump in its class.
nXDS improves on the original XDS pump technology by offering increased pumping speeds, combined with lower ultimate pressures, low power consumption and reduced noise. The gas ballast allows for pumping of condensable vapours, including water, solvents, dilute acids and bases. nXDS pumps feature the very latest in tip seal technology, giving a significantly longer life between tip seal changes.
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| 6i | 10i | 15i | 20i | |
| Nominal rotational speed | 1800 rpm | 1800 rpm | 1800 rpm | 1800 rpm |
| Displacement | 6.2 m3h-1 / 3.6 ft3min-1 | 12.7 m3h-1 / 7.5 ft3min-1 | 17.1 m3h-1 / 10.1 ft3min-1 | 28.0 m3h-1 / 16.5 ft3min-1 |
| Peak pumping speed | 6.2 m3h-1 / 3.6 ft3min-1 | 11.4 m3h-1 / 6.7 ft3min-1 | 15.1 m3h-1 / 8.9 ft3min-1 | 22.0 m3h-1 / 13.0 ft3min-1 |
| Ultimate vacuum (total pressure) | 0.020 mbar / 0.015 Torr | 0.007 mbar / 0.005 Torr | 0.007 mbar / 0.005 Torr | 0.030 mbar / 0.022 Torr |
| Minimum standby rotational speed | 1200 rpm | 1200 rpm | 1200 rpm | 1200 rpm |
| Speed control resolution (percentage of full rotation speed) | 1% | 1% | 1% | 1% |
| Pumping speed at minimum rotational speed | 4.1 | 7.5 | 9.9 | 10 |
| Maximum continuous inlet pressure | 200 mbar | 200 mbar | 200 mbar | 50 mbar |
| Motor power 1-ph | 260 W | 280 W | 300 W | 260 W |
| Power connector 1-ph | IEC EN60320 C13 | IEC EN60320 C13 | IEC EN60320 C13 | IEC EN60320 C13 |
| Recommended fuse | 10A, 250Vac rms | 10A, 250Vac rms | 10A, 250Vac rms | 10A, 250Vac rms |
| Weight | 26.2 kg / 58 lb | 25.8 kg / 57 lb | 25.2 kg / 56 lb | 25.6 kg / 56 lb |
| Inlet flange | NW25 | NW25 | NW25 | NW25 |
| Exhaust flange | NW25 | NW25 | NW25 | NW25 |
| Noise level | 52 dB(A) | 52 dB(A) | 52 dB(A) | 52 dB(A) |
| Vibration at inlet flange | < 4.5 mms-1 (rms) | < 4.5 mms-1 (rms) | < 4.5 mms-1 (rms) | < 4.5 mms-1 (rms) |
| Leak tightness (static) | < 1×10-6 mbar ls-1 | < 1×10-6 mbar ls-1 | < 1×10-6 mbar ls-1 | < 1×10-6 mbar ls-1 |
| Operating temperature range | 10 to 40 °C / 41 to 104 °F | 10 to 40 °C / 41 to 104 °F | 10 to 40 °C / 41 to 104 °F | 10 to 40 °C / 41 to 104 °F |
Description
Edwards nXDS Dry Scroll Pumps
With exceptional pumping capability, ultimate vacuum performance and state-of-the-art design features, the nXDS dry scroll pump is the best performing pump in its class.
nXDS improves on the original XDS pump technology by offering increased pumping speeds, combined with lower ultimate pressures, low power consumption and reduced noise. The gas ballast allows for pumping of condensable vapours, including water, solvents, dilute acids and bases. nXDS pumps feature the very latest in tip seal technology, giving a significantly longer life between tip seal changes.
The Edwards nXDS Dry Scroll Pump is a state-of-the-art, oil-free vacuum pump engineered for laboratories, industrial applications, and precision research environments requiring clean, contamination-free performance. Designed to deliver ultimate vacuum levels as low as 0.1 mbar(mXDS model) and pumping speeds up to 40 m³/h (XDS35iE model), this high-performance vacuum pump eliminates the risk of hydrocarbon backstreaming, making it ideal for sensitive processes like electron microscopy (SEM/TEM), mass spectrometry, and semiconductor manufacturing. Unlike traditional rotary vane pumps, the dry scroll pump operates without oil, ensuring zero maintenance costs for fluid changes and reducing environmental impact. Its hermetically sealed scroll mechanismguarantees reliable, maintenance-free operation for up to 5 years, with extended service intervals that minimize downtime—a critical advantage for industries prioritizing efficiency and uptime.
Engineered for versatility, the nXDS pump series includes multiple configurations, such as the nXDS6i, nXDS10i, and chemical-resistant nXDS-C model, tailored for handling aggressive vapors in applications like chemical processing or pharmaceutical production. The gas ballast control feature allows users to optimize pumping performance for water vapor, solvents, or other condensables, ensuring consistent vacuum levels even in challenging conditions. With quiet operation below 52 dB(A)—quieter than a typical office environment—the nXDS is perfect for noise-sensitive labs, hospitals, or academic facilities. Its compact, field-serviceable design simplifies repairs and part replacements, while low power consumption (compatible with 100-240 VAC) reduces operational costs.
For researchers and engineers seeking a low-noise vacuum pump with ultra-clean operation, the Edwards nXDS excels in critical applications such as turbopump backing, analytical instrumentation, and vacuum coating systems. The KF25 and KF40 flange options ensure compatibility with standard vacuum components, while the anti-vibration mounts (sold separately) enhance stability in high-precision setups. Laboratories working with helium leak detection or cryogenic systems will appreciate the nXDS’s ability to maintain stable vacuum pressures under fluctuating loads.
Technical specifications for the Edwards nXDS Dry Scroll Pump include a maximum inlet pressure of 1,100 mbar, ultimate vacuum of 0.1 mbar (mXDS), and IP44-rated enclosures for durability in harsh environments. The nXDS-C variant adds corrosion-resistant coatings and fluoropolymer seals for pumping aggressive gases, making it a robust choice for chemical labs or industrial etching processes. All models comply with CE, RoHS, and global safety standards, ensuring reliability for OEMs and integrators.
Maintenance and service are streamlined with user-replaceable parts like scroll sets, filters, and seals. High Vac Depot offers comprehensive support, including on-site servicing, preventive maintenance plans, and 24/7 technical assistance to maximize pump lifespan. For facilities requiring continuous operation, the nXDS’s high-duty cycle and thermal protection systems prevent overheating, even during prolonged use.
Pair your nXDS pump with accessories like exhaust filters, silencers, or customizable control modules (compatible with RS-485 communication) to tailor the system to your workflow. Download the nXDS datasheet for detailed performance curves, dimensional drawings, and installation guidelines, or request a quote for bulk orders and institutional pricing.
Whether you’re upgrading a research lab, industrial vacuum line, or medical imaging suite, the Edwards nXDS series combines oil-free technology, ultra-quiet operation, and low total cost of ownership to outperform traditional pumps. Explore why leading universities, aerospace manufacturers, and biotech firms trust the nXDS scroll pump for mission-critical applications—contact High Vac Depot today to schedule a demo or consult with our vacuum experts.
- Oil-free operation (hermetically sealed, no contamination)
- Ultimate vacuum of 0.1 mbar (mXDS model) and speeds up to 40 m³/h (XDS35iE)
- Quiet operation (<52 dB(A)) and low power consumption
- Gas ballast control for vapor handling (e.g., water, solvents)
- Mass spectrometry, SEM/TEM, turbopump backing, chemical processes
- Field-serviceable design with extended service intervals (up to 5 years)
- Used in high-energy physics labs
No contamination and no oil to dispose of: the pumps are hermetically sealed for a lubricant and contamination-free vacuum.
Full On-board Controller
Valve operation occurs at inlet pressures greater than 300 mbar, making this pump tailored to applications that dwell at higher pressures.
Unique tip seal design significantly reduces wear to minimize maintenance and extend service life.
… and for more convenient operation a remote control interface.
Backing turbomolecular pumps
The nXDS comes as standard with a manual, easy to use, gas ballast port, allowing you to effortlessly switch from closed to open position allowing you to follow the best practices of primary vacuum pump operation.
Electron microscopy
Improved performance, exceptional pumping capability, quiet operation and extended service intervals make nXDS the ultimate dry choice!
Mass spectrometry
The nXDS takes scroll vacuum technology to the next level:
XDS35iE(C/R)
Quiet while in use: with low noise power level of 52 dB(A) the nXDS makes for a better work environment and low environmental impact.
nXDS dry scroll pumps
Chamber evacuation
Quiet operation with typical noise during operation < 52 dB(A) for minimal environmental impact.
Integrated Non-return valve
The nXDS features an integrated non-return valve to protect your system from being vented in case of an electrical or power supply failure. In addition, the non-return valve will also protect you from mechanical failure which would normally go undetected by purely solenoid isolation valves.
Why select the nXDS?
A no-gas-ballast ‘R’ variant is available for specialist applications such as gas recirculation, rare gas pumping and recovery or other applications where the dilution of the pumped gas in undesirable, or where sealing is integral to minimising potential gas loss.
Final Pressure
Applications:
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.
Features:
Chemical applications including gel dryers and solvent recovery
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.
Advanced interface providing a variety of traditional and analogue and digital control methods enabling remote control/monitoring via RS232 or RS485.
Models Features:
Your Turbo’s Best Friend
Chemical, Atex, Gas Recirculation
The elimination of over-compression at high operational pressure, reduces power consumption and diminishes bearing loads, extending bearing live.
The nXDS allows a wide range of control and communication options. Parallel remote from your own control system via the 15 way d-sub connector giving you the sane START, STOP and STANDBY with the option of analogue speed control.
Hermetic Bellows
Simple to operate: with intelligent and easy to use controls.
Edwards nXDS Dry Scroll pump provides excellent vacuum levels, vapour pumping capability while being quiet and offering ultra-low maintenance intervals that even the customer can carry out. Overall it provides superior performance and reliability together with very low running and maintenance costs. The nXDS is a smart investment combining great performance with low overall running and maintenance costs.
Advanced scroll-form and tip-seal technologies deliver best in-class vacuum performance and unrivaled ultimate vacuum levels.
The nXDS incorporates Edwards’ patented and long established, truly dry, hermetically sealed mechanism of the XDS series. Hermetic sealing ensures that the vacuum environment is not contaminated by bearing lubricant and, conversely, the bearings are not contaminated by process gas being pumped.
A perfect companion for your turbomolecular pump, the nXDS keeps things dry while providing excellent backing pressures and backing capacities for your turbo pump to deliver it’s best performance. its integrated non-return valve will protect modern turbos from electrical or mechanical failures. And thanks to the “auto-run” feature, you can activate an option for the dry backing pump to re-start automatically in case of a momentary power supply failure to your system.
Equipped with patented technology that prevents over-compression within the scroll mechanism at high operational pressure and large throughput applications.
Quicker process thanks to superior vapour handling, making the nXDS suitable to an even wider range of applications!
Gas Ballast & Gas Recirculation
Its intelligent control functions and up to five years service interval ensures low cost of ownership, making it the small dry pump of choice for today’s most advanced technologies.
nXDS is a dry scroll pump offering pumping speeds of 6-20 m3h-1, combined with lower ultimate pressures, lower power consumption and lower noise levels than other pumps.
The nXDS integrates a fully capable on-board controller with a local control panel, allowing options such as start-stop, speed-pressure control, stand-by mode, auto-run for backing turbos and LED lights to indicate when the next service is due. The service intervals are optimised and calculated from a combination of run-hours, number of starts, operating pressure and temperature parameters, to give you prolonged and more accurate recommended service intervals.
6, 10, 15, 20 m3/h
Special Versions
Easy to use manual control buttons including a standby speed control button for efficient process tuning.
Lubricant-free within the vacuum envelope and hermetically sealed means a totally clean and dry vacuum to prevent cross contamination.
The onboard pump controller allows for:
nXDS pumps are designed to be completely field serviceable.
Twin by-pass valves release sufficiently compressed gas directly to the pump exhaust, increasing efficiency, lowering power consumption and enhancing pumping speed.
Low cost of ownership due to the combination of long service interval and low power consumption.
Integrated inverter drive with auto sensing input delivers optimized pumping performance globally.
Pumping Speeds
For more aggressive applications, ‘C’ variants are available which feature Chemraz internal valves and stainless steel fittings for extra protection from the pumped media.
High energy physics
Serial communication remote through RS232 or RS485 with a choice of Edwards‘ proprietary ‘DX’ protocol or industry standard Modbus protocol. Edwards software provides customers additional diagnostics and monitoring options, as well as the possibility to see when the next recommended service is due. Communication is also possible through Labview.
Remote Communication
nXDS
Wide range voltage input with automatic selection.
Up to 7×10-3 mbar
Brand
Edwards
