EP-CMW series oil-free scroll air compressor technical parameters

CMW High Pressure Oil-Free Scroll Compressor 1.2 MPa | 174 PSI

CMW high pressure oil-free scroll compressor, 1.2 MPa (174 PSI), 3–27 kW, 210–2160 L/min, 49–63 dB(A). For nitrogen generation, laser assist gas & industrial process. Class 0.

Category:

Description

CMW Series High Pressure Oil-Free Scroll Air Compressor — 1.2 MPa / 174 PSI

3 kW – 27 kW  ·  210 – 2160 L/min (7 – 76 cfm)  ·  49 – 63 dB(A)  ·  ISO 8573-1 Class 0  ·  1/2″ – 1″ outlet

At 1.2 MPa (174 PSI), the CMW series enters territory that single-stage piston compressors typically cannot reach cleanly — and where oil-free operation becomes even more critical, because the contamination risk concentrates as the gas is compressed. This pressure tier is specified when the process genuinely requires it: nitrogen generation feed air at higher inlet pressure (to reduce PSA or membrane generator size), laser cutting assist gas at elevated supply to accommodate long distribution runs, industrial process applications where a 1.0 MPa supply falls short after system losses, and specialty chemical or testing applications with specific high-pressure instrument air requirements.

The 1.2 MPa CMW series offers eight models, from CMW3.0-1.2 (3 kW, single head, 210 L/min) to CMW27-1.2 (4.5 kW × 6 heads, 2160 L/min). The minimum motor power at entry level shifts to 3 kW (vs 2.2 kW in the 0.8 and 1.0 MPa series), reflecting the additional compression work at the higher pressure ratio. From CMW9-1.2 onward, each head is 4.5 kW — consistent with the 1.0 MPa multi-head architecture.

Gas production at 1.2 MPa is lower than at 0.8 or 1.0 MPa for the same motor power — an unavoidable consequence of the higher compression ratio. The CMW27-1.2 (27 kW, 6 heads) delivers 2160 L/min at 1.2 MPa versus 2460 L/min from the equivalent CMW27-1.0 at 1.0 MPa. When specifying, always confirm that your flow requirement is stated at the actual working pressure — not at a lower reference pressure — to avoid under-sizing the system.

CMW Series Technical Parameters — Full Product Line

CMW series high pressure oil-free scroll compressor 1.2 MPa 174 PSI technical parameters — all models

CMW series complete parameter table · 0.8 / 1.0 / 1.2 MPa configurations

1.2 MPa Series High Pressure Oil-Free Scroll Air Compressor— Key Performance Data

1.2 MPa
174 PSI — highest pressure in the CMW scroll series; single-stage oil-free compression
210–2160 L/min
Gas production range at 1.2 MPa across 8 models — 7 to 76 cfm
49–63 dB(A)
Same quiet operating profile as lower-pressure CMW variants — no penalty for higher pressure
ISO Class 0
Oil-free at source — no oil to concentrate as pressure increases
3 kW → 27 kW
From compact single-head to 6-head multi-unit — scales with your process demand

CMW Series 1.2 MPa — Complete Model Specifications

Pressure adjustable 0.2–1.2 MPa (29–174 PSI). Gas production at rated 1.2 MPa. Noise ±3 dB(A). L×W×H in mm.

Model Power
kW / HP		 Pressure
MPa / PSI		 Output
L/min		 Output
cfm		 Noise
dB(A)		 Air outlet
inch		 Weight
kg		 Dimension
L×W×H mm
CMW3.0-1.2 3 / 5 0.2–1.2 / 29–174 210 7 49±3 1/2″ 132 665×630×940
CMW4.5-1.2 4.5 / 6 0.2–1.2 / 29–174 360 13 52±3 1/2″ 150 660×665×990
CMW6.0-1.2 3×2 / 8 0.2–1.2 / 29–174 420 15 52±3 1/2″ 150 800×670×1190
CMW9-1.2 4.5×2 / 12 0.2–1.2 / 29–174 720 25 58±3 1″ 185 880×670×1190
CMW13.5-1.2 4.5×3 / 18 0.2–1.2 / 29–174 1080 38 61±3 1″ 300 1400×800×1280
CMW18-1.2 4.5×4 / 25 0.2–1.2 / 29–174 1440 51 61±3 1″ 350 1400×800×1280
CMW22.5-1.2 4.5×5 / 30 0.2–1.2 / 29–174 1800 64 63±3 1″ 600 1400×800×1870
CMW27-1.2 4.5×6 / 36 0.2–1.2 / 29–174 2160 76 63±3 1″ 650 1400×800×1870

Output Comparison Across Pressure Series — Same Frame Size

Choosing the right pressure rating starts with understanding the flow trade-off. The table below shows gas production at rated pressure for the 6-head flagship model in each pressure series:

Model Rated Pressure Motor Power Gas Production Output vs 0.8 MPa
CMW22-0.8 0.8 MPa / 116 PSI 3.7×6 = 22.2 kW 2490 L/min Baseline
CMW27-1.0 1.0 MPa / 145 PSI 4.5×6 = 27 kW 2460 L/min −1.2%
CMW27-1.2 1.2 MPa / 174 PSI 4.5×6 = 27 kW 2160 L/min −13.3%

The 13% output reduction from 0.8 to 1.2 MPa at equivalent motor power is the cost of the higher compression ratio. If your process requires 1.2 MPa but your flow demand is close to the output of a given model, size up to the next model to ensure adequate pressure under all operating conditions.

Applications That Specify 1.2 MPa Oil-Free Scroll Compression

High pressure oil-free scroll compressor 1.2 MPa for chemical fiber textile industry — process air and pneumatic control

Chemical fiber and textile — false-twist spinning and high-speed winding require elevated pressure instrument air; oil-free supply prevents fiber contamination and eliminates carbon filter maintenance.
Nitrogen Generation Feed Air

PSA nitrogen generators and membrane nitrogen systems both have higher productivity when supplied at elevated inlet pressure. A high pressure oil-free scroll compressor for nitrogen generation at 1.2 MPa increases nitrogen generator output for a given membrane or sieve bed size — effectively reducing the generator capital cost per unit of N₂ produced. Oil-free feed air is essential: oil contamination irreversibly damages molecular sieve beds, and even membrane systems show accelerated degradation with oil-containing feed. The CMW3.0-1.2 through CMW13.5-1.2 covers the feed air range for laboratory to mid-scale nitrogen generation.

Laser Cutting Assist Gas Supply

CO₂ and fibre laser cutting systems use compressed air as an assist gas for cutting mild steel, aluminium, and non-metallic materials at feed pressures of 0.6–1.0 MPa at the cutting head. When the laser is located at significant distance from the compressor room (50–100 m piping), supply pressure of 1.2 MPa accounts for distribution losses and maintains cutting head pressure under full flow. Oil-free supply also prevents lens contamination and nozzle fouling — oil carryover on optics causes focal point drift and cutting quality degradation. The CMW 1.2 MPa scroll compressor 174 PSI models CMW9-1.2 through CMW22.5-1.2 match common laser cutting system air demand.

Chemical Fiber & Textile

High-speed false-twist texturing machines and POY spinning lines use instrument air at 0.8–1.0 MPa working pressure for tension control actuators and guide roller positioning systems. With distribution losses in a large texturing hall (often 150–200 m long), 1.2 MPa supply maintains pressure at the machine even when all positions are active simultaneously. Oil-free air is a quality and operational requirement — oil contamination on yarn causes breakage, roller slippage, and downstream dyeing defects.

Specialty Industrial Process

Pressure testing, leak detection, component cleaning, and calibration gas applications that require precise pressure up to 1.2 MPa from a clean, oil-free source. The CMW3.0-1.2 (210 L/min, 132 kg, 665×630×940 mm) is compact enough for workshop or test bench installation where a larger screw compressor would be impractical. Its 49±3 dB(A) noise output is low enough for near-operator working environments without hearing protection requirements.

High pressure oil-free scroll compressor 174 PSI for chemical fiber spinning and texturing — oil-free process air

Texturing and POY spinning lines — instrument air at 1.2 MPa supply covers distribution losses in large halls while maintaining actuator performance at all machine positions.

High pressure oil-free scroll compressor for beverage production — PET pre-blow and instrument air at 1.2 MPa

Beverage production — large PET bottling plants with extensive pipework benefit from 1.2 MPa supply to maintain adequate pre-blow pressure at remote filling positions; oil-free air protects product quality.

CMW6.0-1.2 — The Dual 3 kW Head Configuration Explained

The CMW6.0-1.2 uses two 3 kW heads (3×2) rather than a single 4.5 kW head, delivering 420 L/min at 1.2 MPa — compared with 360 L/min from the single-head CMW4.5-1.2. The dual-head architecture provides the same head redundancy benefit as in other multi-head CMW models: one head can be maintained while the other continues to supply air at 210 L/min (half capacity).

For applications where continuous air supply is required but the flow demand is modest — a nitrogen generator fed at 1.2 MPa, a small laser machine with long distribution pipework, a test bench requiring sustained clean air — the CMW6.0-1.2 offers redundancy at a capacity that a single larger head would over-specify. At 150 kg and 800×670×1190 mm, it also fits in spaces that the larger 1400 mm footprint models cannot.

Model Selection Guide — 1.2 MPa Series

  • CMW3.0-1.2 (210 L/min / 7 cfm): Single laboratory instrument at 1.2 MPa, small N₂ generator feed, pressure testing bench
  • CMW4.5-1.2 (360 L/min / 13 cfm): Single laser cutter (small), 2–3 laboratory instruments, small membrane N₂ generator
  • CMW6.0-1.2 (420 L/min / 15 cfm): As CMW4.5-1.2 with head redundancy — preferred for critical N₂ generation or laser operations
  • CMW9-1.2 (720 L/min / 25 cfm): Medium laser cutter, small chemical fiber texturing line instrument air, mid-scale N₂ generator
  • CMW13.5-1.2 (1080 L/min / 38 cfm): Large laser machine, pharma or chemical plant central instrument air at extended distribution
  • CMW18-1.2 (1440 L/min / 51 cfm): Multiple laser cutters, large texturing line, industrial campus instrument air with 1.2 MPa requirement
  • CMW22.5-1.2 (1800 L/min / 64 cfm): Large industrial plant central high-pressure clean air supply, major N₂ generation system
  • CMW27-1.2 (2160 L/min / 76 cfm): Campus-scale high-pressure oil-free air, large N₂ generation, multi-line laser facility

Which Pressure Series Is Right for Your Application?

Criterion 0.8 MPa (116 PSI) 1.0 MPa (145 PSI) 1.2 MPa (174 PSI)
Process pressure needed ≤ 0.7 MPa at tool 0.7–0.9 MPa at tool 0.9–1.1 MPa at tool
Distribution length < 30 m 30–100 m > 100 m
Primary applications Medical, dental, lab, food Pharma, cleanroom, large lab N₂ gen, laser, textile, industrial
Max gas production (6-head) 2490 L/min 2460 L/min 2160 L/min
Oil-free (Class 0) ✓ ✓ ✓

Technical Questions

Can the CMW 1.2 MPa scroll compressor be used as a feed for a PSA nitrogen generator?
Yes — this is one of its designed use cases. PSA nitrogen generators benefit from higher inlet pressure because the adsorption capacity of molecular sieve per unit volume increases with pressure. Supplying a PSA generator at 1.2 MPa instead of 0.8 MPa can increase nitrogen output by 20–35% from the same sieve bed volume, or reduce the required sieve bed size for a given N₂ demand. The oil-free discharge is essential — a single oil contamination event permanently damages the zeolite sieve material, requiring complete sieve replacement. The CMW series provides the high-pressure, clean feed air that PSA systems require without the cost and footprint of a dedicated oil-free screw compressor.
Is the 1.2 MPa scroll compressor suitable for continuous 24/7 operation?
Yes. All CMW models are designed for continuous-duty operation. At 1.2 MPa, scroll discharge temperature is higher than at 0.8 MPa due to the higher compression ratio — typically 15–25 °C above the 0.8 MPa discharge temperature for the same ambient conditions. For 24/7 operation, ensure adequate ventilation around the unit (minimum 1 m clearance on the discharge side of air-cooled models) and monitor inlet air temperature to stay within rated ambient limits. Multi-head units are particularly suited for 24/7 critical applications because planned head maintenance can be done without system shutdown.
How does the CMW 1.2 MPa compare to a small oil-free screw compressor at similar power?
The CMW scroll is quieter (49–63 dB(A) vs typically 65–72 dB(A) for a comparably sized oil-free screw), requires no gearbox oil, has no timing gears, and the multi-head architecture provides redundancy a single-body screw cannot match. The screw compressor has advantages at higher power levels (above 30 kW, screw efficiency per unit of output is generally better) and for applications requiring continuous 100% duty cycle with no tolerance for any maintenance downtime. For the 3–27 kW range at 1.2 MPa, the multi-head scroll offers a better balance of noise, reliability, and maintenance flexibility for most industrial applications.
What electrical supply voltage is standard, and are other voltages available?
Standard configuration is 380V / 3-phase / 50 Hz. 220V single-phase is available for the small single-head models (CMW2.2 and CMW3.0 variants) where site 3-phase supply is unavailable. 460V / 60 Hz for North American markets and 415V / 50 Hz for UK/Australian markets are available with a lead-time impact at quotation stage. All multi-head models above 4 kW total require 3-phase supply. Specify your site voltage, frequency, and fault level at enquiry stage to ensure the motor and contactor ratings are correctly matched.

Specify Your CMW 1.2 MPa Configuration

Tell us your required flow at 1.2 MPa (L/min or cfm), application (N₂ generation, laser assist, textile, or other), distribution pipe length, and site electrical supply — we’ll confirm the model, redundancy configuration, and lead time.

Related products