EP-CM11BF Water-Lubricated Oil-Free Screw Air Compressor
The EP-CM11BF is an 11 kW fixed-frequency water-lubricated oil-free screw compressor delivering up to 1.55 m³/min at 0.8–1.25 MPa — balancing higher output capacity with the same ultra-quiet 58 dB(A) noise floor as the entry-level model, purpose-built for electronics manufacturing, pharmaceutical processing, and precision coating environments demanding structural Class 0 oil-free air.
EP-CM11BF | 11 kW Water-Lubricated Oil-Free Screw Compressor — More Output, Same Quiet
When a single laboratory instrument or dental chair grows into a small production line or multi-instrument facility, the compressed air demand grows with it — but the requirements for air purity and operational quietness do not relax. Electronics manufacturing cells, small pharmaceutical processing rooms, precision spray coating booths, and multi-chair dental practices all operate in the territory where 7.5 kW is insufficient and the step to a mid-size industrial compressor feels disproportionate. The EP-CM11BF is designed for exactly this operational band.
At 11 kW (15 HP), the EP-CM11BF delivers up to 1.55 m³/min (55 cfm) of ISO 8573-1 Class 0 oil-free compressed air at working pressures from 0.8 to 1.25 MPa — a 35% output increase over the EP-CM08BF while maintaining the identical 58 dB(A) noise floor. The water-lubricated single-screw compression mechanism operates without oil at any point, providing a structural Class 0 guarantee across the full operating life of the machine. For growing operations that need more than the entry-level output but cannot compromise on air quality or noise, the EP-CM11BF closes that gap precisely. View the full CMB series for the complete output range.
Technical Specifications
| Parameter | 0.8 MPa | 1.0 MPa | 1.25 MPa |
|---|---|---|---|
| Motor Power | 11 kW / 15 HP | 11 kW / 15 HP | 11 kW / 15 HP |
| FAD (m³/min) | 0.48–1.55 | 0.53–1.32 | 0.48–1.02 |
| FAD (cfm) | 17–55 | 19–47 | 17–36 |
| Noise Level | 58 dB(A) | 58 dB(A) | 58 dB(A) |
| Weight (Water-cooled) | 650 kg | 650 kg | 650 kg |
| Weight (Air-cooled) | 520 kg | 520 kg | 520 kg |
| Dimensions W-cooled (mm) | 1550×775×1445 | 1550×775×1445 | 1550×775×1445 |
| Dimensions A-cooled (mm) | 1350×774×1150 | 1350×774×1150 | 1350×774×1150 |
| Air Quality | ISO 8573-1 Class 0 | ISO 8573-1 Class 0 | ISO 8573-1 Class 0 |
| Lubrication | Pure water — zero oil | Pure water — zero oil | Pure water — zero oil |
The Electronics Manufacturing Case for Structural Oil-Free Air
In electronics manufacturing — PCB assembly, SMT pick-and-place, component cleaning, and conformal coating — compressed air contacts product surfaces directly. Oil vapour in the compressed air supply, even at concentrations below ISO Class 1 limits, can deposit on PCB copper traces and component pads, causing solder balling, flux activation failure, and adhesion defects that manifest as field failures rather than production-line rejects. The cost of tracing a field failure back to compressed air contamination — in warranty claims, diagnostic labour, and reputational damage — vastly exceeds the cost differential between oil-injected and oil-free compression technology.
The EP-CM11BF eliminates this risk at the source. Water lubrication produces no oil that can enter the compressed air stream under any operating condition. ISO 8573-1 Class 0 certification verified by Germany TUV covers oil content, particulates, and moisture — providing the documentation required for electronics manufacturing quality audits without reliance on downstream filter condition.
Key Features
35% More Output Than Entry Level
The step from 7.5 kW to 11 kW delivers approximately 35% more free air delivery at 0.8 MPa — from 1.15 m³/min to 1.55 m³/min — while maintaining the identical 58 dB(A) noise level and ISO 8573-1 Class 0 air quality. This increment covers the gap between single-instrument supply and small multi-user installations.
0.8–1.25 MPa Pressure Range
The full pressure range accommodates diverse application requirements from a single machine: standard laboratory and dental supply at 0.5–0.8 MPa, pharmaceutical processing at 0.7–0.8 MPa, and higher-pressure precision spray coating or tool driving at 1.0–1.25 MPa. Pressure setpoint is adjustable via the PLC controller.
58 dB(A) — Quiet Across Full Output
Maintaining 58 dB(A) at 11 kW output requires the specific noise characteristics of the single-screw water-lubricated design: no belt drive, no gear train, no valve clatter, and the inherent smoothness of the orbital compression cycle. The acoustic enclosure and CMN-patented intake structure complete the noise management system.
Zero Oil Condensate
No oil enters the compression circuit, so no oil-contaminated condensate is produced. There is no oil-water separator to install, maintain, or replace. For facilities under ISO 14001 environmental management certification, elimination of compressor oil waste streams simplifies compliance documentation and reduces hazardous waste audit scope.
Direct-Drive Permanent Magnet Motor
The 11 kW motor is direct-coupled to the air end — no belt, no coupling, no transmission loss. IP54 environmental protection and Class F insulation allow installation in light industrial environments with moderate dust and humidity levels. Motor efficiency is 3–5% above standard asynchronous alternatives.
Stainless Steel Throughout
Air end housing, water circuit pipework, air-water separation barrel, and outlet connections are all stainless steel. Rust, scale, and metallic particle contamination are structurally eliminated — meeting the zero-particulate requirements of pharmaceutical GMP, semiconductor fabrication, and precision optics manufacturing.
Customer Case Studies
Germany — PCB Assembly Contract Manufacturer
Industry: Electronics Manufacturing | Application: Compressed air for SMT pick-and-place machines and PCB cleaning stations
"After experiencing two oil-contamination related soldering defect batches in one quarter, our quality manager specified structural oil-free technology for all compressed air points in the SMT area. The EP-CM11BF's 58 dB(A) allowed installation inside the production room rather than in a remote compressor room — simplifying piping and eliminating the distribution losses that contributed to our previous pressure instability issues."
★★★★★
Netherlands — Small-Batch Pharmaceutical Producer
Industry: Pharmaceutical | Application: GMP process air for tablet coating and granulation on small-batch production lines
"Our GMP audit required documented proof of structural oil-free status — filter-dependent certification was not acceptable to our auditor. The EP-CM11BF's TUV Class 0 certificate, combined with its water-only lubrication design, provided exactly what was required. Seventeen months in, we have had zero GMP deviations attributable to compressed air quality."
★★★★★
Canada — Precision Optics Manufacturer
Industry: Optics | Application: Oil-free air for lens cleaning, anti-reflection coating, and air bearing spindle supply
"Optical coating processes are particularly sensitive to oil vapour — even sub-ppm oil contamination causes adhesion failure in anti-reflection coatings. The EP-CM11BF eliminated our coating adhesion rejection rate, which had been running at 3–4% on our previous oil-injected installation. The machine has now operated for over 18 months and the rejection rate attributable to air quality is zero."
★★★★★
Frequently Asked Questions
Specify the EP-CM11BF for Your Application
Electronics assemblers, pharmaceutical producers, precision coating specialists, and dental networks in Germany, the Netherlands, Canada, and 50+ markets rely on Ever Power 11 kW water-lubricated technology for contamination-critical compressed air supply. Contact our team to confirm fit and receive a detailed quotation.
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