EP-CM08BF Water-Lubricated Oil-Free Screw Air Compressor
The EP-CM08BF is a 7.5 kW fixed-frequency water-lubricated oil-free screw compressor delivering up to 1.15 m³/min at 0.8–1.25 MPa — an ultra-quiet 58 dB(A) entry-level unit engineered for laboratories, food-adjacent production, and light industrial environments where Class 0 oil-free air purity and minimal footprint are the primary requirements.
EP-CM08BF | 7.5 kW Entry-Level Water-Lubricated Oil-Free Screw Compressor
Not every compressed air application demands large capacity. Research laboratories, analytical instrument rooms, small-batch food production units, dental clinics, and prototype manufacturing cells have modest flow requirements — but their air quality requirements are no less stringent than high-volume industrial installations. In these environments, the choice of compressor technology matters as much as the choice of capacity, and the presence or absence of oil in the compressed air supply has direct consequences for the work being performed.
The EP-CM08BF is the entry point of Ever Power's CMB series water-lubricated oil-free screw compressors. At 7.5 kW (10 HP), it delivers up to 1.15 m³/min of ISO 8573-1 Class 0 certified oil-free compressed air at working pressures from 0.8 to 1.25 MPa — with an operational noise level of just 58 dB(A) that makes it one of the quietest compressors in its class. Water lubrication eliminates oil from the compression chamber entirely, providing a structural oil-free guarantee that downstream filtration cannot replicate. Explore the full CMB series range to compare all available configurations.
Technical Specifications
| Parameter | 0.8 MPa | 1.0 MPa | 1.25 MPa |
|---|---|---|---|
| Motor Power | 7.5 kW / 10 HP | 7.5 kW / 10 HP | 7.5 kW / 10 HP |
| FAD (m³/min) | 0.45–1.15 | 0.41–1.02 | 0.48–1.02 |
| FAD (cfm) | 16–41 | 14–36 | 17–36 |
| Noise Level | 58 dB(A) | 58 dB(A) | 58 dB(A) |
| Weight (Water-cooled) | 630 kg | 630 kg | 630 kg |
| Weight (Air-cooled) | 500 kg | 500 kg | 500 kg |
| Dimensions W-cooled (mm) | 1550×775×1445 | 1550×775×1445 | 1350×774×1150 |
| Air Quality | ISO 8573-1 Class 0 | ISO 8573-1 Class 0 | ISO 8573-1 Class 0 |
| Drive | Fixed frequency | Fixed frequency | Fixed frequency |
| Lubrication | Pure water — zero oil | Pure water — zero oil | Pure water — zero oil |
Why Water Lubrication at 7.5 kW Matters
At smaller power classes, the argument for water-lubricated oil-free technology is sometimes questioned — conventional wisdom suggests that oil-injected compressors with downstream filtration are adequate for low-flow applications, and that the cost premium of oil-free technology is only justified at larger scales. This reasoning overlooks a fundamental point: the risk of oil contamination from filter failure or bypass does not scale with compressor size. A filter element past its service interval in a 7.5 kW compressor passes oil at the same concentration as one in a 75 kW machine. The consequences of that contamination — in a laboratory instrument, a pharmaceutical production cell, or a food-contact packaging line — are identical regardless of compressor size.
The EP-CM08BF addresses this at the source. No oil enters the compression chamber at any point. The water lubrication mechanism is not a filtration stage that can be bypassed or degraded — it is the fundamental operating principle of the machine. Class 0 oil-free air quality is a structural property of the compressor, not a parameter that depends on maintenance compliance or filter condition.
Key Features
58 dB(A) Ultra-Quiet Operation
At 58 dB(A), the EP-CM08BF operates at a noise level comparable to a quiet conversation. This makes it suitable for direct installation within laboratories, clinical areas, and office-adjacent production spaces without acoustic enclosures or hearing protection requirements.
Structural ISO 8573-1 Class 0
Water is the only substance in the compression chamber. No oil separator, coalescing filter, or activated carbon adsorber is required to achieve Class 0 air quality. The classification is maintained regardless of operating hours, ambient temperature, or maintenance state.
Dual Cooling Configuration
Available in water-cooled (W) and air-cooled (F) variants. The air-cooled model requires only electrical connection and compressed air outlet piping — no cooling water infrastructure needed, making it suitable for any installation environment.
Stainless Steel Air End
The single-screw stainless steel air end — rated for over 25 years of continuous operation — operates at approximately 3,000 rpm with balanced radial loads from symmetrical star wheel placement. Low rotational speed and balanced loading are the structural basis for the air end's extended service life.
Minimal Consumables
Air filter element and water filter element replacements on a periodic schedule, plus annual bearing greasing. No oil, no oil filter, no separator. Total annual maintenance time is typically under two hours.
Schneider Electric PLC Control
The logic control system displays discharge temperature, system pressure, run-hour counter, and fault diagnostics. Maintenance reminders are generated automatically based on operating hours — ensuring service tasks are never missed even in lightly staffed facilities.
Target Applications
| Application | Why EP-CM08BF Fits | Pressure Used |
|---|---|---|
| Analytical chemistry laboratories | Class 0 eliminates oil interference with instruments | 0.5–0.8 MPa |
| Food & beverage small-batch production | HACCP-compliant oil-free air from structural guarantee | 0.6–0.8 MPa |
| Dental clinic central air | 58 dB(A) — unobtrusive beside treatment chairs | 0.6–0.7 MPa |
| Pharmaceutical tablet production | GMP-compatible Class 0 air quality | 0.7–0.8 MPa |
| Electronics component testing | Zero oil vapour prevents test fixture contamination | 0.4–0.8 MPa |
| Cosmetics manufacturing | Oil-free air for filling and packaging | 0.6–0.8 MPa |
Customer Case Studies
United Kingdom — University Analytical Laboratory
Industry: Research | Application: Carrier gas supply for GC-MS and HPLC instruments
"Our instrument supplier specified Class 0 oil-free air as a prerequisite for the GC-MS installation. The EP-CM08BF was the only 7.5 kW compressor that carried TUV-verified structural Class 0 certification — not filter-dependent compliance. The 58 dB(A) noise level has made the instrument room a comfortable working environment for our research staff."
★★★★★
Australia — Artisan Food Production Facility
Industry: Food Manufacturing | Application: Oil-free air for pneumatic filling and packaging on small-batch production lines
"HACCP certification for our facility required documented Class 0 oil-free compressed air. The EP-CM08BF's TUV certification provided the documentation we needed immediately. The compact footprint fits within our existing utility room and the low noise means our production staff are comfortable working adjacent to the machine all day."
★★★★★
South Korea — Cosmetics R&D Centre
Industry: Cosmetics Research | Application: Clean air supply for formulation lab and small-batch filling trials
"In our R&D environment, any oil contamination from the compressed air supply would invalidate formulation trials and risk product safety assessments. The EP-CM08BF eliminated this risk structurally. We have run it for 16 months without a single maintenance event beyond the scheduled filter replacement — exactly the low-overhead operation our lab team needed."
★★★★★
Frequently Asked Questions
Start with the Right Technology
Laboratories, food producers, dental clinics, and cosmetics manufacturers across the UK, Australia, South Korea, and 50+ markets rely on Ever Power water-lubricated technology for their most contamination-sensitive compressed air applications. Contact our technical team to confirm EP-CM08BF fit for your specific installation.
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