EP-CM320B Water-Lubricated Oil-Free Screw Air Compressor
The EP-CM320B is the 320 kW flagship of the CMB water-lubricated oil-free screw compressor series, delivering up to 59.10 m³/min at 0.8–1.25 MPa — the highest single-unit output in the series, engineered for LNG terminals, steel rolling mills, large cement plants, and the most demanding industrial compressed air utilities on earth requiring Class 0 oil-free air at 59+ m³/min from one machine.
EP-CM320B | 320 kW CMB Series Flagship — 59.10 m³/min, the Highest Single-Unit Water-Lubricated Output
At the pinnacle of the CMB water-lubricated oil-free screw compressor series sits a machine that, by any measure of output capacity, represents the upper boundary of what a single water-lubricated single-screw compressor unit can deliver. The EP-CM320B produces 59.10 m³/min (2,086 cfm) of ISO 8573-1 Class 0 oil-free compressed air at 0.8 MPa from a single 320 kW machine — more than two thousand cubic feet per minute of structurally oil-free, isothermal-compressed, 25-year-design-life guaranteed process air, from one unit with one maintenance schedule and zero oil in its compression circuit.
The industrial environments that require this capacity are among the most demanding in the world: LNG liquefaction terminals where instrument air failure has safety consequences; steel rolling mills where surface quality depends on contamination-free process air at every stage; large cement plants with compressed air demands that run continuously 24 hours a day; major chemical complexes where hundreds of safety-critical control valves depend on reliable, clean instrument air. For these applications, the EP-CM320B provides the capacity, the quality guarantee, and the operational simplicity that only a single-unit, fixed-frequency, water-lubricated design can deliver. For engineering consultation on installations at this scale, contact Ever Power's engineering team directly.

Technical Specifications
| Parameter | 0.8 MPa | 1.0 MPa | 1.25 MPa |
|---|---|---|---|
| Motor Power | 320 kW / 430 HP | 320 kW / 430 HP | 320 kW / 430 HP |
| FAD (m³/min) | 23.64–59.10 | 21.40–53.50 | 19.30–48.25 |
| FAD (cfm) | 835–2086 | 756–1889 | 681–1704 |
| Noise Level | 80 dB(A) | 80 dB(A) | 80 dB(A) |
| Weight | 4850 kg | 4850 kg | 4850 kg |
| Dimensions (mm) | 3600×2800×2000 | 3600×2800×2000 | 3600×2800×2000 |
| 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 |
LNG Terminals: Safety-Critical Instrument Air at Maximum Scale
An LNG liquefaction or regasification terminal is one of the most demanding environments for compressed air infrastructure. Instrument air serves thousands of pneumatic control devices across cryogenic process trains operating at temperatures as low as -163°C. Emergency shutdown systems — the last line of defence against process safety incidents — rely on instrument air to actuate isolation valves and vent systems in emergency conditions. The quality and reliability of the instrument air supply at an LNG terminal is therefore not a production quality issue but a process safety issue, with consequences that extend to personnel safety and environmental protection.
The EP-CM320B provides the output capacity and structural oil-free quality guarantee that LNG terminal instrument air specifications require. At 59.10 m³/min, it covers the instrument air demand of a major LNG train — typically 40–60 m³/min at 0.7–0.8 MPa — from a single unit. The structural Class 0 oil-free guarantee eliminates oil as a contamination source for pneumatic control devices and safety system actuators across the entire instrument air network served by the machine. And the 25-year design service life aligns with the operating horizon of LNG terminal capital assets, which are typically designed for 20–30 year operational lives.

Complete CMB Series Overview
| Model | Power (kW) | Max FAD (m³/min) | Noise dB(A) | Primary Focus |
|---|---|---|---|---|
| EP-CM08BF | 7.5 | 1.15 | 58 | Laboratory / dental / light industrial |
| EP-CM11BF | 11 | 1.55 | 58 | Electronics / pharmaceutical / precision |
| EP-CM15BF | 15 | 2.40 | 63 | Textile / food processing / production |
| EP-CM18BF | 18.5 | 3.10 | 65 | Spray painting / chemical / beverage |
| EP-CM22BF | 22 | 3.50 | 65 | Semiconductor / medical devices / beverage |
| EP-CM30BF | 30 | 5.00 | 66 | Food factory / laundry / multi-line packaging |
| EP-CM37BF | 37 | 6.10 | 67 | Chemical plant / large workshop / process air |
| EP-CM45BF | 45 | 7.80 | 68 | Glass container / food factory / printing |
| EP-CM55BF | 55 | 8.60 | 70 | Hospital medical air / textile mill / nonwoven |
| EP-CM75BF | 75 | 12.90 | 73 | Semiconductor fab / pharma plant / petrochemical |
| EP-CM90BF | 90 | 16.30 | 73 | Automotive paint / brewery / central plant |
| EP-CM110BF | 110 | 19.40 | 76 | Semiconductor central / API pharma / continuous process |
| EP-CM132BF | 132 | 22.21 | 78 | EV battery / hydrogen fuel cell / advanced fab |
| EP-CM160BF | 160 | 28.85 | 78 | Petrochemical / paper mill / mining station |
| EP-CM200B | 200 | 36.63 | 78 | Steel / airport / port / large industrial |
| EP-CM250B | 250 | 42.88 | 78 | Shipyard / chemical complex / data centre |
| EP-CM320B | 320 | 59.10 | 80 | LNG terminal / steel mill / cement plant — CMB flagship |
Key Features
59.10 m³/min — CMB Series Maximum Output
The EP-CM320B delivers the highest free air delivery of any single model in the CMB water-lubricated series: 59.10 m³/min (2,086 cfm) at 0.8 MPa. This output covers LNG terminal instrument air systems, large steel rolling mill process and control air, major cement plant compressed air utilities, and other very large industrial installations from a single machine with one maintenance programme.
320 kW Isothermal Efficiency — 256,000 kWh Annual Saving
At 320 kW and 8,000 annual operating hours, the isothermal compression advantage versus dry adiabatic alternatives represents approximately 256,000 kWh of annual electricity saving — the highest absolute annual energy saving in the entire CMB series. For LNG terminals, steel mills, and cement plants running 24/7 on continuous production cycles, this saving represents a very significant annual operating cost reduction.
Structural Class 0 for Safety-Critical Utilities
In LNG terminals, steel mills, and cement plants where instrument air serves safety-critical control systems, the structural Class 0 guarantee of water lubrication provides the quality assurance basis that safety case documentation requires. No filter bypass risk, no thermal desorption, no carbon breakthrough — oil contamination of the instrument air supply is eliminated as a failure mode by the design of the machine, not by the condition of a consumable component.
25-Year Design Life — Long-Term Asset Value
The 25-year air end design life matches the operating horizon of major industrial capital assets. For LNG terminals, steel rolling mills, and cement plants designed for 20–30 year operational lives, the EP-CM320B provides the compressed air utility foundation without a mid-life capital replacement event — the air end delivers consistent performance from commissioning through to the end of the facility's planned operating life.
80 dB(A) at 320 kW — Industrial Plant Standard
At 320 kW, the EP-CM320B produces 80 dB(A) — the highest noise level in the CMB series, reflecting the scale of the machine. At LNG terminals, steel mills, and cement plants where industrial noise standards apply and dedicated plant rooms are standard practice, 80 dB(A) is within normal equipment specifications. Hearing protection protocols apply for personnel in close proximity during operation.
Multi-Unit Station for Maximum Facility Reliability
For facilities requiring both maximum capacity and full redundancy, multiple EP-CM320B units in load-sharing or master-standby configuration provide total compressed air capacity that can secure very large facility demand even under single-unit maintenance conditions. Ever Power's AI-optimised station management coordinates multi-unit stations automatically, providing demand-responsive staging and rotation scheduling without manual intervention.

Customer Case Studies
Australia — Offshore LNG Processing Terminal
Industry: LNG Processing | Application: Instrument air for a major two-train LNG liquefaction facility — control valves, ESD actuators, and flare system pneumatics
"Our instrument air specification requires structural Class 0 oil-free air with a documented basis that satisfies our safety case review. The EP-CM320B's TUV structural Class 0 certification and water-lubricated design — with no oil in the compression circuit that could contaminate safety-critical actuators — provided the documentation basis our safety case reviewer required. At 59.10 m³/min, one unit covers both LNG trains. In 28 months of continuous operation on our offshore platform, performance has remained within commissioning specification."
★★★★★
China (export market reference) — Large Integrated Steel Rolling Mill
Industry: Steel Manufacturing | Application: Process and instrument air for hot strip mill, cold rolling mill, and surface treatment line across a major integrated steel complex
"Our integrated steel complex requires 52 m³/min across hot strip, cold rolling, and surface treatment simultaneously. The EP-CM320B at 59.10 m³/min covers our peak combined demand with capacity margin. The structural Class 0 oil-free air supply has eliminated process air contamination as a source of surface quality defects on our automotive-grade cold-rolled products — a quality improvement our major automotive customer recognised in their annual supplier assessment."
★★★★★
Germany — Large Cement and Building Materials Group
Industry: Cement Manufacturing | Application: Central compressed air for kiln combustion air control, raw mill pneumatic conveying, and product dispatch automated packaging
"A cement plant runs 24/7 for 11 months of the year — the compressor must be equally continuous. The EP-CM320B's 25-year design life and fixed-frequency operational simplicity were the primary selection criteria. No VSD electronics to maintain, no rotor coatings to monitor, and no multi-stage gear train to service — just one machine with one annual maintenance event. In 36 months of operation, we have never had an unplanned compressor shutdown."
★★★★★
Frequently Asked Questions
The CMB Flagship. 59.10 m³/min. The World's Most Demanding Industrial Air Utilities.
LNG terminals, steel rolling mills, cement plants, and major industrial complexes in Australia, China, Germany, and 50+ markets rely on Ever Power's 320 kW water-lubricated technology as the compressed air foundation for their most critical and highest-volume industrial utilities. Contact our engineering team for a complete system proposal tailored to your facility's specific requirements.
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