Edwards Dry Scroll Pump nXDS20i - 16.5 Cfm

The Edwards nXDS20i series is a compact, oil-free dry scroll platform engineered for clean, dependable rough and medium vacuum across research, analytical, and pilot-scale processes. Choose the standard nXDS20i for broad utility, the corrosion-resistant nXDS20iC for aggressive vapors, or the nXDS20iR configured with a blanked gas ballast.
All variants feature DN 25 ISO-KF (NW25) inlet/outlet flanges, quiet 52 dB(A) operation with forced-air cooling, IP20 protection, and universal single-phase power (100–127/200–240 V, 50/60 Hz). Integration is simplified with CE, UL, CSA, and EAC certifications plus DX-protocol communication.

Note: Regional mains power cable sold separately. See accessories for C13/C14 options. Gas ballast and inlet filtration accessories available for optimal vapor handling.
Oil-Free Dry Scroll 52 dB(A) Quiet Universal 1-Ph Power DN 25 ISO-KF
Clean, oil-free vacuum: Hermetically sealed scrolls keep the process lubricant-free and reduce contamination risk.
Low noise & vibration: ~52 dB(A) with balanced scrolls for a comfortable lab environment and stable installations.
Lower cost of ownership: Long service intervals, low power draw, and easy user controls maximize uptime.
nXDS Instructions nXDS Brochure
Why this nXDS20i-series pump?

Quiet operation: ~52 dB(A) for a better working environment.
Oil-free, hermetically sealed design: contamination-free process, no oil to dispose of.
Low power consumption: efficient single-phase operation keeps energy costs down.
Intuitive controls & DX protocol: flexible integration with monitoring systems.
Vapor handling & variants: Standard (nXDS20i), corrosion-resistant (nXDS20iC), or R-variant with blanked gas ballast.
Get help selecting the right variant, accessories, and integration details.
Technical Specifications
Model
Edwards nXDS20i Dry Scroll Vacuum Pump
Inlet / Outlet Flange
DN 25 ISO-KF (NW25) / DN 25 ISO-KF (NW25)
Power Supply
1-Ph, 100–127/200–240 V, 50/60 Hz
Noise Level
~52 dB(A)
Cooling
Forced-air (fan)
IP Rating
IP20
Dimensions (L × W × H)
0.432 m × 0.282 m × 0.302 m
Weight
25.60 kg
Ultimate Pressure (mbar)
3.00; 6.00 with gas ballast
Leak Rate
1.000 × 10⁻⁷
Vibration (rms)
4.500 × 10⁻³ m/s
Certifications
CE; UL (61010-1 3rd); CSA (C22.2 No.61010-1-12); EAC
Motor Certification
UL (61010-1 3rd); CSA (C22.2 No.61010-1-12)
Communication
DX protocol
Operating Temperature
5–40 °C (ambient)
Storage Temperature
-30–70 °C (ambient)
Max Inlet Pressure (abs)
5000
Max Outlet Pressure (abs)
1.500 × 10⁵
ATEX Category
Ex II 3 G Ex h IIC T4 Gc X (internal atmospheres only)
Materials (vacuum-wetted)
Anodized & cast aluminum, nickel, PTFE, stainless steel, fluorocarbon elastomer seals, chemically-resistant polymers
Variants Available
nXDS20i (standard) • nXDS20iC (corrosion-resistant) • nXDS20iR (blanked gas ballast)
Analytical / GC-MS / LC-MS Pharmaceutical & Biotech Vacuum Processing Academic & Research
FAQ

What’s the difference between nXDS20i, nXDS20iC, and nXDS20iR?

nXDS20i: standard variant for general clean-vacuum service. nXDS20iC: corrosion-resistant build for chemically aggressive vapors. nXDS20iR: gas ballast blanked (no ballast) for applications where ballast is not used.
Is the pump truly oil-free?

Yes. The dry scroll mechanism is hermetically sealed, providing an oil-free process path to minimize contamination and simplify maintenance.
What power do I need?

Universal single-phase input: 100–127/200–240 V at 50/60 Hz. A compatible mains cable (C13/C14) is required and sold separately.
Can I handle vapor loads?

Yes. Use appropriate gas ballast and inlet filtration for your solvent stream. For corrosive vapors, select the nXDS20iC and consult recommended accessories.
What are typical service intervals?

The nXDS family is designed for long service intervals with low routine maintenance.