Edwards Dry Scroll Pump nXDS6i - 4.0 cfm

The Edwards nXDS6 series is a compact, oil-free dry scroll platform ideal for laboratories and process lines that demand clean vacuum, low maintenance, and consistent uptime. Choose from the standard nXDS6i, the corrosion-resistant nXDS6iC, or the nXDS6iR variant configured without gas ballast.
Each model features NW25 (DN 25 ISO-KF) inlet/outlet flanges, quiet 52 dB(A) operation with forced-air cooling, and universal single-phase power. UL/CSA/CE/EAC certifications make integration straightforward for research, analytical, and pilot-scale environments.
With IP20 protection, balanced scrolls, and DX-protocol communication interface, the nXDS6 family offers dependable rough vacuum performance across a wide range of applications.

Confirm electrical plug style and clearance using the dimensions table below before ordering. Cables and certain accessories (e.g., gas ballast, inlet filters) are selected separately.
Dry Scroll Pump NW25 Inlet/Outlet 52 dB(A) Quiet UL / CSA / CE / EAC
Clean, oil-free vacuum: Dry scroll mechanism protects samples and instruments—no oil back streaming.
Quiet & compact: 52 dB(A) with forced-air cooling and small footprint for benchtop or rack installs.
Built for uptime: IP20, DX protocol, global 100–240 V input, and certified to UL/CSA/CE/EAC.
nXDS Instructions nXDS Brochure
Why these nXDS6 pumps?

Oil-free performance — dry scroll technology eliminates oil changes and contamination risk.
Lab-friendly acoustics — only 52 dB(A) with forced-fan cooling for 24/7 operation.
Universal power — 1-Ph, 100–127/200–240 V, 50/60 Hz with IEC C14 inlet.
Certified & safe — UL 61010-1 (3rd Ed.), CSA C22.2 No. 61010-1-12, CE, EAC.
Pick your variant — standard (nXDS6i), corrosion-resistant (nXDS6iC), or R variant without gas ballast (nXDS6iR).
Technical Specifications
Specification
nXDS6i
nXDS6iC
nXDS6iR
Connection Inlet Flange
DN 25 ISO-KF (NW25)
DN 25 ISO-KF (NW25)
DN 25 ISO-KF (NW25)
Connection Vacuum Outlet Flange
DN 25 ISO-KF (NW25)
DN 25 ISO-KF (NW25)
DN 25 ISO-KF (NW25)
Weight
26.20
26.20
26.20
Leak Rate
1.000 × 10⁻⁷
1.000 × 10⁻⁷
1.000 × 10⁻⁷
Power Supply Phase
1-Ph
1-Ph
1-Ph
Power Supply Voltage
1Ph 100–127/200–240V 50/60Hz
1Ph 100–127/200–240V 50/60Hz
1Ph 100–127/200–240V 50/60Hz
IP Rating
IP20
IP20
IP20
Power Supply Frequency
50 / 60 Hz
50 / 60 Hz
50 / 60 Hz
Dimension Length
0.432
0.432
0.432
Dimension Height
0.302
0.302
0.302
Dimension Width
0.282
0.282
0.282
Connector (Electrical Power)
IEC EN60320 C14 (male for C13)
IEC EN60320 C14 (male for C13)
IEC EN60320 C14 (male for C13)
Noise / Sound Level
52.00 dB(A)
52.00 dB(A)
52.00 dB(A)
Cooling Method
Air cooling (forced fan)
Air cooling (forced fan)
Air cooling (forced fan)
Vibration Level Velocity (rms)
4.500 × 10⁻³ m/s
4.500 × 10⁻³ m/s
4.500 × 10⁻³ m/s
Product Certifications
CE; UL 61010-1 (3rd Ed.); CSA C22.2 No.61010-1-12; EAC
CE; UL 61010-1 (3rd Ed.); CSA C22.2 No.61010-1-12; EAC
CE; UL 61010-1 (3rd Ed.); CSA C22.2 No.61010-1-12; EAC
Accessories / Scope of Supply
Mains power cable not included; select by region. See gas ballast and filter accessories for reliable operation.
Dimension Comments
Length/width/height describe outer shape in typical orientation; verify 2D drawings and 3D models for detailed fit.
Certification Motor
UL 61010-1 (3rd Ed.); CSA C22.2 No.61010-1-12
UL 61010-1 (3rd Ed.); CSA C22.2 No.61010-1-12
UL 61010-1 (3rd Ed.); CSA C22.2 No.61010-1-12
Performance Data
Pressure Water Vapour Max
3500.00
3500.00
3500.00
Capacity Water Vapour
3.056 × 10⁻⁵
3.056 × 10⁻⁵
3.056 × 10⁻⁵
Pressure Ultimate with Gas Ballast
5.00
5.00
5.00
Pressure Ultimate
2.00
2.00
2.00
Nominal Rotational Speed
30.00
30.00
30.00
Power at Atmosphere (Continuous)
270.00
270.00
270.00
Power at Ultimate
260.00
260.00
260.00
Power in Standby Mode
170.00
170.00
170.00
Pumping Speed Air/N₂ (@50Hz or max default)
1.722 × 10⁻³
1.722 × 10⁻³
1.722 × 10⁻³
Power at Ultimate with Gas Ballast
260.00
260.00
260.00
Operation Conditions – Limitations
Pressure Absolute Inlet (Continuous Max)
20000.00
313.15
313.15
Altitude Max
2000.00
278.15
278.15
Pressure Absolute Outlet (Continuous Max)
1.500 × 10⁵
243.15
243.15
Environmental Conditions (reference)

343.15
343.15
Temperature Ambient Operation Max
313.15
Temperature Ambient Operation Min
278.15
20000.00
20000.00
Temperature Ambient Storage Min
243.15
2000.00
2000.00
Temperature Ambient Storage Max
343.15
1.500 × 10⁵
1.500 × 10⁵
Classification
Product Pressure Range
Medium Vacuum: 1 mbar – 1·10⁻³ mbar
Medium Vacuum: 1 mbar – 1·10⁻³ mbar
Medium Vacuum: 1 mbar – 1·10⁻³ mbar
Rough Vacuum Range
1000 mbar – 1 mbar
1000 mbar – 1 mbar
1000 mbar – 1 mbar
Vacuum Pump Class
Rough Vacuum Pump
Rough Vacuum Pump
Rough Vacuum Pump
Dry or Wet
Dry
Dry
Dry
Vacuum Pump Technology
Dry Scroll Pump
Dry Scroll Pump
Dry Scroll Pump
Connectivity / Interface
Communication Interface Protocol
DX protocol
DX protocol
DX protocol
Variants
Variant Scroll Pump
standard
C
R
Notes
Standard variant
C – Corrosion resistant
R – Variant without gas ballast
ATEX Category
Ex II 3 G Ex h IIC T4 Gc X (internal atmospheres only)
Ex II 3 G Ex h IIC T4 Gc X (internal atmospheres only)
Ex II 3 G Ex h IIC T4 Gc X (internal atmospheres only)
Materials of Construction
General MoC
Steel, copper, hydrocarbon lubricant and chemically resistant polymers
Steel, copper, hydrocarbon lubricant and chemically resistant polymers
Steel, copper, hydrocarbon lubricant and chemically resistant polymers; special sealing polymers to improve corrosion resistance
Materials Exposed to Vacuum
Anodised aluminium, cast aluminium, nickel, PTFE, stainless steel, fluorocarbon elastomer seals, chemically resistant polymers
Anodised aluminium, cast aluminium, nickel, PTFE, stainless steel, fluorocarbon elastomer seals, chemically resistant polymers
Anodised aluminium, cast aluminium, nickel, PTFE, stainless steel, fluorocarbon elastomer seals, chemically resistant polymers
Rotor Material
Aluminum anodised
Aluminum anodised
Aluminum anodised
Stator Material
Aluminum anodised
Aluminum anodised
Aluminum anodised
Analytical Instruments Pharmaceutical Chemical Sciences Academic & Research
FAQ

What are the differences between nXDS6i, nXDS6iC, and nXDS6iR?

nXDS6i is the standard model. nXDS6iC uses corrosion-resistant materials/seals for aggressive vapors. nXDS6iR is supplied without gas ballast for applications that do not require vapor handling.
Do these pumps need oil changes?

No. They are dry scroll designs—no oil in the vacuum path—reducing maintenance and contamination risk.
What does the gas ballast do?

Gas ballast improves handling of condensable vapors (e.g., water). If you frequently pump moisture or solvents, choose nXDS6i or nXDS6iC and add the appropriate ballast accessory.
Are cables and filters included?

Power cable is not included and must be selected for your region. Inlet filters and foreline accessories are optional.