EP-CM320PV Variable Frequency Water-Lubricated Oil-Free Screw Air Compressor
The EP-CM320PV is the 320 kW flagship of the CMPV variable frequency water-lubricated oil-free screw compressor series, delivering 23.64–59.10 m³/min at 0.8–1.25 MPa — the highest-output VSD water-lubricated oil-free compressor in the series, engineered for LNG terminals with variable liquefaction train loading, large steel mill VSD utility stations, and the most demanding variable-demand industrial processes on earth requiring structural Class 0 oil-free air at 59+ m³/min with permanent magnet VSD energy optimisation.
EP-CM320PV | 320 kW CMPV Series Flagship — 59.10 m³/min VSD for the World's Most Demanding Variable-Demand Utilities
At the pinnacle of the CMPV variable frequency water-lubricated oil-free series, the EP-CM320PV combines two superlatives: the highest output and the largest absolute annual energy saving in the entire series. With 59.10 m³/min (2,086 cfm) of maximum free air delivery at 0.8 MPa and a permanent magnet VSD delivering energy consumption proportional to actual demand across its full 23.64–59.10 m³/min range, it serves the world's most demanding variable-demand industrial compressed air utilities — LNG terminals where liquefaction train loading varies with gas feed and tanker scheduling, large steel mills where rolling programme changes create continuous demand variation, and major industrial complexes where a single VSD unit must track the combined demand variation of an entire facility.
The water-lubricated single-screw compression mechanism that defines the CMB and CMPV series operates identically in the EP-CM320PV as in every other model: no oil in the compression circuit at any operating speed, structural ISO 8573-1 Class 0 guarantee at every VSD setting, isothermal compression maintaining chamber temperature at ambient +15°C throughout the operating cycle, and a 25-year air end design life rated for continuous 7×24 operation. What the 320 kW VSD flagship adds is the capacity to serve the largest single-unit variable-demand compressed air requirements in industrial infrastructure — and the intelligence to serve them at minimum possible energy cost at every operating moment. 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 (PM VSD) | 320 kW / 430 HP (PM VSD) | 320 kW / 430 HP (PM VSD) |
| FAD range (m³/min) | 23.64–59.10 | 21.40–53.50 | 19.30–48.25 |
| FAD range (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 |
| Drive Type | Permanent magnet VSD | Permanent magnet VSD | Permanent magnet VSD |
| Motor Efficiency | ≥94% (IE4 class) | ≥94% (IE4 class) | ≥94% (IE4 class) |
| Pressure Band | ±0.1 MPa | ±0.1 MPa | ±0.1 MPa |
| 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 |
320 kW VSD Economics: The Largest Single-Unit Energy Saving in the CMPV Series
| Cost Dimension | Fixed-Frequency | Variable Frequency (VSD) |
|---|---|---|
| Energy over 10 years | ~80% of total ownership cost | ~45–50% — up to 35% electricity saving |
| Startup current | High inrush — 6–8× running current | Soft-start — zero inrush |
| Partial-load efficiency | Full power at 40% demand | Speed proportional to demand |
| Pressure band | ±2–3 bar (on/off cycling) | ±0.1 MPa continuous VSD control |
| Idle period waste | Continues at full speed | Reduces to minimum stable speed |
| VSD premium payback | — | Typically 6–18 months at large scale |
Complete CMPV Series Overview
| Model | Power (kW) | Max FAD (m³/min) | Noise dB(A) | Primary VSD Application |
|---|---|---|---|---|
| EP-CM08PVF | 7.5 | 1.15 | 58 | R&D lab / multi-shift dental |
| EP-CM11PVF | 11 | 1.55 | 58 | Cleanroom pressurisation / electronics test |
| EP-CM15PVF | 15 | 2.40 | 63 | Food / beverage seasonal demand |
| EP-CM18PVF | 18.5 | 3.10 | 65 | Spray coating variable booth / cosmetics |
| EP-CM22PVF | 22 | 3.50 | 65 | Semiconductor tool cycles / multi-campaign pharma |
| EP-CM30PVF | 30 | 5.00 | 66 | Large food plant multi-shift / industrial laundry |
| EP-CM37PVF | 37 | 6.10 | 67 | Chemical dosing / water treatment variable throughput |
| EP-CM45PVF | 45 | 7.80 | 68 | Multi-format packaging / automotive assembly |
| EP-CM55PVF | 55 | 8.60 | 70 | Hospital medical air / variable loom count textile |
| EP-CM75PVF | 75 | 12.90 | 73 | Semiconductor fab utilisation / pharma multi-campaign |
| EP-CM90PVF | 90 | 16.30 | 73 | Automotive paint booth scheduling / brewery seasonal |
| EP-CM110PVF | 110 | 19.40 | 76 | Semiconductor central VSD / API pharma batch variable |
| EP-CM132PVF | 132 | 22.21 | 78 | EV gigafactory VSD / hydrogen fuel cell variable |
| EP-CM160PVF | 160 | 28.85 | 78 | Petrochemical VSD trim / paper mill seasonal throughput |
| EP-CM200PV | 200 | 36.63 | 78 | Steel rolling mill VSD / airport variable demand |
| EP-CM250PV | 250 | 42.88 | 78 | Shipyard VSD outfitting / chemical complex variable |
| EP-CM320PV | 320 | 59.10 | 80 | CMPV flagship — LNG variable train / steel mill VSD ★ |
LNG Terminal Variable Train Loading: Structural Class 0 at Partial Load
LNG liquefaction terminal instrument air systems serve the most safety-critical control architecture in industrial infrastructure. Emergency shutdown system actuators, high-integrity pressure protection system valves, and liquefaction train isolation valves all depend on continuous, high-quality instrument air supply. At partial train loading — when the liquefaction rate drops to 60–70% of nameplate capacity due to gas feed variability or downstream tanker scheduling — the instrument air demand decreases proportionally, but the quality requirement does not.
The EP-CM320PV provides both the capacity and the quality guarantee that LNG terminal instrument air specifications require, at every train loading level. The structural Class 0 oil-free guarantee — maintained at every VSD speed from 23.64 to 59.10 m³/min — means that safety-critical actuators receive uncontaminated instrument air regardless of the current train loading or compressor speed setting. The VSD energy saving at partial train loading reduces the compressed air system's contribution to terminal operating cost — at 65% average train loading, the annual electricity saving versus fixed-frequency operation approaches 700,000 kWh.
Key Features
59.10 m³/min VSD Maximum — CMPV Series Peak
The EP-CM320PV delivers the highest variable output in the CMPV series: 59.10 m³/min (2,086 cfm) at 0.8 MPa. Its 23.64–59.10 m³/min VSD range covers the complete demand variation of the largest LNG terminal instrument air systems and major steel mill utility stations from a single VSD machine.
640,000–800,000 kWh Annual VSD Saving
At 320 kW and 65% average demand: annual VSD saving versus fixed-frequency amounts to approximately 640,000–800,000 kWh — the highest absolute annual electricity saving in the CMPV series. VSD premium payback is typically within 3–6 months at this power class for facilities with significant demand variability.
LNG Variable Train Loading Tracking
The EP-CM320PV tracks LNG liquefaction train loading variation — from full capacity at 59.10 m³/min to partial loading at 23.64 m³/min — automatically, maintaining ±0.1 MPa pressure stability at every train loading level. Structural Class 0 oil-free quality for safety-critical instrument air is unchanged at any VSD speed.
Structural Class 0 for Safety-Critical Process Air
Water lubrication's structural Class 0 guarantee is the only oil-free certification basis that satisfies safety case documentation for LNG terminal instrument air systems. No filter bypass risk, no carbon breakthrough, no thermal desorption — the oil-free guarantee is inherent to the machine design, not dependent on consumable component condition.
AI Station Management — Multi-Unit Flagship
Multiple EP-CM320PV units or mixed CMPV/CMB configurations can be coordinated by Ever Power's AI-optimised station management system — automatically staging, rotating, and demand-responding across all units for minimum total station energy consumption with full-capacity redundancy.
25-Year Design Life — LNG Terminal Asset Horizon
The 25-year air end design life matches the operational planning horizon of LNG terminal capital assets. From first liquefaction to planned terminal upgrade, the EP-CM320PV delivers consistent VSD-optimised Class 0 instrument air without a mid-life capital replacement event — sustained by the balanced radial load, low rotational speed, and aviation-grade star wheel materials of the single-screw water-lubricated architecture.
Customer Case Studies
Qatar — Major LNG Liquefaction Terminal
Industry: LNG Processing | Application: VSD instrument air for a four-train LNG liquefaction facility where train loading varies with gas feed from offshore fields
"Our four-train facility operates between 65% and 100% of nameplate liquefaction capacity depending on gas field deliverability. Instrument air demand tracks train loading proportionally. The EP-CM320PV's VSD reduces compressed air electricity consumption during partial-load periods automatically. Annual energy saving versus the fixed-frequency unit it replaced: 28%. The structural Class 0 oil-free water-lubricated design was specified by our safety case reviewer as the only acceptable technology for instrument air serving ESD and HIPPS valve actuators."
★★★★★
South Korea — Integrated Steel Rolling and Surface Treatment Complex
Industry: Steel Manufacturing | Application: VSD central compressed air for hot strip mill, continuous annealing line, and electrolytic galvanising line with continuously variable production speed and grade changes
"Our mill changes product grade and rolling speed multiple times per hour. The aggregate compressed air demand varies from 24 m³/min at light gauge, low-speed passes to 58 m³/min at full-speed heavy strip rolling. The EP-CM320PV tracks every grade change in real time. Annual energy saving versus fixed-frequency: 25%. The structural Class 0 oil-free supply has also eliminated oil-related surface defects on our automotive-exposed panel grades — a quality improvement our major automotive customer recognised in their supplier assessment."
★★★★★
United States — Large Integrated Chemicals and Plastics Complex
Industry: Chemicals and Plastics | Application: VSD trim control in a central instrument air station for a major petrochemical and plastics manufacturing campus with variable multi-unit throughput
"Our campus has 12 major process units with independent throughput schedules. Aggregate instrument air demand ranges from 25 m³/min when several units are in turnaround to 57 m³/min at full complex operation. The EP-CM320PV as VSD trim unit alongside three fixed-frequency base load units provides the full campus demand coverage with optimal energy efficiency at every operating combination. Annual station energy saving versus previous all-fixed-frequency configuration: 24%."
★★★★★
Frequently Asked Questions
The CMPV Flagship. 59.10 m³/min. 320 kW VSD. Structural Class 0.
LNG terminals, major steel rolling complexes, and large integrated chemical campuses in Qatar, South Korea, the United States, and 50+ markets rely on the EP-CM320PV as the compressed air utility foundation for their most demanding variable-demand industrial operations. Contact our engineering team for a complete flagship system proposal.
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