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.

EP-CM320B 320kW flagship CMB water-lubricated oil-free compressor 59.10 m3/min LNG steel cement

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.

EP-CM320B single screw water lubrication LNG terminal steel mill cement plant flagship industrial

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.

EP-CM320B 320kW flagship CMB series water-lubricated oil-free compressor LNG steel cement central

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

What makes the EP-CM320B the CMB series flagship?
The EP-CM320B delivers 59.10 m³/min at 0.8 MPa — the highest free air delivery of any single-unit model in the CMB water-lubricated oil-free screw compressor series. At 320 kW, it represents the maximum output achievable from a single water-lubricated single-screw air end in the CMB product family. It is the definitive choice for the world's largest single-unit water-lubricated compressed air requirements in fixed-frequency configuration.
What LNG terminal applications require the EP-CM320B's output capacity?
LNG liquefaction and regasification terminals use large volumes of instrument-quality compressed air for pneumatic control valves across cryogenic process trains, emergency shutdown system actuators, flare system controls, and loading arm pneumatics. The consequence of instrument air quality failure at an LNG terminal extends beyond production quality into process safety — clean, oil-free, continuously reliable instrument air is a safety-critical utility. At 59.10 m³/min, the EP-CM320B covers the instrument air demand of a major LNG train from a single unit.
How does the EP-CM320B serve a large steel rolling mill?
Steel rolling mills use compressed air for descaling nozzle control, roller table actuation, coiler control systems, and surface inspection equipment. Hot-rolled and cold-rolled steel surface quality depends on contamination-free process air at the rolling and surface treatment stages. The EP-CM320B's 59.10 m³/min output covers the combined process and instrument air demand of large rolling mill complexes, and the structural Class 0 oil-free guarantee protects surface quality at every compressed air contact point.
What is the energy cost implication of operating the EP-CM320B continuously?
At 320 kW and 8,000 annual operating hours, total electricity consumption at full load is approximately 2,560,000 kWh per year. The 10%+ isothermal compression efficiency advantage represents approximately 256,000 kWh annual electricity saving versus dry adiabatic alternatives — at industrial electricity rates, a very substantial annual cost reduction that makes the water-lubricated technology premium recoverable within the first one to two years of continuous operation.
Can the EP-CM320B integrate into a multi-unit compressed air station?
Yes. Multiple EP-CM320B units can be coordinated in an AI-optimised central compressed air station for very large industrial facilities where single-unit capacity is insufficient or where full-capacity redundancy is required. Ever Power's station design service provides complete engineering of multi-unit configurations including automated staging, rotation scheduling, demand response, and SCADA integration for facilities requiring maximum compressed air system reliability.

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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