Dry Scroll Pumps
Dry scroll vacuum pumps are positive displacement pumps that trap and compress gas molecules using two spiral-shaped scrolls—one fixed and the other revolving. These are low-maintenance, oil-free pumps that are frequently utilized in clean vacuum applications. They are an environmentally favorable option because they do not require oil for lubrication or sealing, removing the possibility of oil leaks and pollution.
At Edwards, we are dedicated to providing the most sustainable solution both today and in the future, and we are pushing our technology to their limit.
nXDSi Scroll Pumps
The fantastic new design in dry vacuum pumping is the Edwards nXDS.
The scroll vacuum technique has been advanced by the nXDS. nXDS is the best dry option because of its superior performance, outstanding pumping capacity, silent operation, and longer service intervals. Pumping speeds within the range are 6 to 20 m3/h.
nXDS20i
Our greatest peak pumping speed model in the nXDS family is the nXDS20i. Standard variants R and C, which include blanked gas ballast and corrosion resistance, respectively, are appropriate for a wide range of applications.
Part Number: A73502840
Features and Benefits
Silent operation – Improved workspace
Hermetically sealed to create a vacuum environment free of lubricants; no need to dispose of oil, no contamination during operation
Minimal power usage – Cheap ownership
Controls that are intuitive and clever – Operational flexibility
Improved management of vapor – Greater scope of use extended periods of service Increased uptime
General Product Information
| Connection Vacuum Inlet Flange | DN 25 ISO-KF (NW25) |
| Weight | 25.60 kg |
| Connection vacuum outlet flange | DN 25 ISO-KF (NW25) |
| Leak Rate | 1.000 × 10⁻⁷ Pa·m³/s |
| Power Supply Phase | 1-Ph |
| Supply Voltage | 1Ph 100-127/200-240V 50/60Hz |
| Dimension Length | 0.432 m |
| IP Rating | IP20 |
| Supply Frequency | 50 Hz
60 Hz |
| Dimension Height | 0.302 m |
| Dimension Width | 0.282 m |
| dimensionsCombinedLengthWidthHeight | 0.432 m
0.432 m 0.432 m |
| Connection Power | IEC EN60320 C14 – Male (for C13 plug on mains cable) |
| Noise Level | 52.00 db(A) |
| Cooling Method | Air Cooling (forced – fan) |
| Vibration Level Velocity (rms) | 4.500 × 10⁻³ m/s |
Performance Data
| Pressure Water Vapour Max. | 3500.00 Pa |
| Capacity Water Vapour | 6.111 × 10⁻⁵ kg/s |
| pressureUltimateWithGasBallast | 6.00 Pa |
| Pressure Ultimate | 3.00 Pa |
| Rotational Speed Nominal | 30.00 Hz |
| Power at Atmosphere | 730.00 W |
| Power at Ultimate (Quiescent) | 260.00 W |
| Power Standby Mode | 250.00 W |
| Pumping Speed Nominal | 6.111 × 10⁻³ m³/s |
| powerAtUltimateWithGb | 405.00 W |
Environmental Conditions
| Temperature Ambient Operation Max | 313.15 K |
| Temperature Ambient Operation Min. | 278.15 K |
| Temperature Ambient Storage Min. | 243.15 K |
| Temperature Ambient Storage Max. | 343.15 K |
Operation Conditions – Limitations
| Pressure Inlet Continous Max. | 5000.00 Pa |
| Altitude Max. | 2000.00 m |
| Pressure Outlet Continous Max. | 1.000 × 10⁵ Pa |
Classification
| Product Pressure Range | Medium Vacuum – 1 mbar – 1*10-3 mbar |
| High / Medium / Rough Vacuum Classification | Medium Rough Vacuum Pump |
| Dry or Wet Pump | Dry pump |
| Vacuum Pump Technology | Dry Scroll Pump |
Connectivity – Communication Interface
| Communication Interfaces Customer | RS232 (serial)
RS485 (serial) Parallel I/O USB 0-10 V (analog – input speed control) Start Stop Standby push button control |
| Connection electrical comms interface connector | DSUB 15-PIN – Male
USB type B – Female |
| Communication Interface Protocol | DX protocol |
Variants
| Variant Scroll Pumps | R – Variants without gas ballast |
| Variant Atex Category | Ex II 3 G Ex h IIB T4 Gc – internal atmospheres only |
nXDS20i – 100-127/200-240V 1Ph 50/60Hz
The nXDS20i is our standard product variant which can be operated in a wide range of applications.
| Connection Vacuum Inlet Flange | DN 25 ISO-KF (NW25) |
| Connection vacuum outlet flange | DN 25 ISO-KF (NW25) |
| Cooling Method | Air Cooling (forced – fan) |
| Pressure Ultimate | 3.00 Pa |
| Supply Voltage | 1Ph 100-127/200-240V 50/60Hz |
nXDS20iC – 100-127/200-240V 1Ph 50/60Hz
With its modifications, the nXDS20iC is now more suited for usage in vapour handling procedures and could find use in some corrosive material applications. Stainless steel fittings and Chemraz® internal valve pads are included in this chemically resistant variant.
| Connection Vacuum Inlet Flange | DN 25 ISO-KF (NW25) |
| Connection vacuum outlet flange | DN 25 ISO-KF (NW25) |
| Cooling Method | Air Cooling (forced – fan) |
| Pressure Ultimate | 3.00 Pa |
| Supply Voltage | 1Ph 100-127/200-240V 50/60Hz |
nXDS20iR – 100-127/200-240V 1Ph 50/60Hz
The gas ballast on the nXDS20iR has been blanked off to prevent accidental opening. These variations are offered for specialized uses such as rare gas pumping and recovery, gas recirculation, and other uses where it is not desired for the pumped gas to become diluted or when sealing is essential to reducing possible gas loss.
| Connection Vacuum Inlet Flange | DN 25 ISO-KF (NW25) |
| Connection vacuum outlet flange | DN 25 ISO-KF (NW25) |
| Cooling Method | Air Cooling (forced – fan) |
| Pressure Ultimate | 3.00 Pa |
| Supply Voltage | 1Ph 100-127/200-240V 50/60Hz |
Dry Vacuum Pump nXDS Scroll Pump-Instructions
Acoustic Enclosure for nXDS-XDS Scroll Pumps and EM-RV Rotary Vane Pumps-Instructions
