EP-CM75GPV Water-Lubricated Oil-Free VSD Screw Air Compressor for PET Bottle Blowing
The EP-CM75GPV is a 75 kW dual-motor permanent magnet VSD water-lubricated oil-free screw compressor delivering 2.5–6.3 m³/min at up to 4.0 MPa (40 bar) — combining Class 0 oil-free air purity with variable speed energy savings of up to 35% for PET bottle blowing lines with fluctuating production demand.
EP-CM75GPV | Dual-Motor Permanent Magnet VSD Water-Lubricated Compressor — 40 Bar, 35% Energy Saving
In the economics of PET bottle manufacturing, energy cost is not a secondary consideration — it is the dominant variable in the total cost of compressed air production. Industry analysis consistently shows that electricity accounts for approximately 60% of the ten-year total cost of ownership of an industrial compressor, with equipment purchase representing only 10%. On a high-speed rotary blowing line operating at 40 bar, the compressor runs continuously — and at that pressure and volume, every percentage point of energy efficiency translates directly into measurable annual savings.
The EP-CM75GPV was engineered to address precisely this challenge. It combines Ever Power's proven single-screw water lubrication technology — delivering ISO 8573-1 Class 0 oil-free compressed air at pressures up to 4.0 MPa (40 bar) — with a dual permanent magnet VSD motor system that achieves energy savings of 30–35% versus fixed-speed water-lubricated compressors at equivalent output. The variable air delivery range of 2.5–6.3 m³/min (88–222 cfm) allows the machine to track production demand precisely throughout the blowing cycle, mold change periods, and planned production pauses — eliminating the energy waste of fixed-speed systems that continue running at full power regardless of demand.
For PET packaging operations seeking to reduce their compressed air electricity spend, improve their sustainability metrics, and maintain the water lubrication technology advantage — zero oil, ultra-low discharge temperature, simple maintenance — the EP-CM75GPV represents the highest efficiency configuration within the CMG series at this power class. Explore the full CMG series range to understand where this model fits within the broader product family.
Complete Technical Specifications
| Parameter | Specification |
|---|---|
| Model | EP-CM75GPV |
| Drive Type | Dual permanent magnet VSD (variable speed drive) |
| Motor Configuration | 2 × 37 kW | 2 × 50 HP (total 75 kW / 100 HP) |
| Working Pressure | 2.0 – 4.0 MPa (290 – 580 psi / up to 40 bar) |
| Free Air Delivery (FAD) | 2.5 – 6.3 m³/min | 88 – 222 cfm (variable) |
| Noise Level | 70 dB(A) |
| Weight | 2250 kg |
| Dimensions (L×W×H) | 2000 × 1900 × 1480 mm |
| Motor Efficiency | Up to 97% (permanent magnet) |
| Energy Saving vs Fixed Speed | 30–35% |
| Lubrication Medium | Pure water (zero oil) |
| Discharge Temp. | ≤ ambient + 15°C |
| Air Quality | ISO 8573-1 Class 0 / TUV certified |
| Design Service Life | >25 years / 7×24 h continuous |
Variable Frequency Technology: How the EP-CM75GPV Saves Energy
More than 80% of a compressor's lifecycle cost comes from the electricity it consumes. In conventional fixed-speed compressor installations, this cost is structurally inflated: when a PET blowing line pauses for mold changes, product transitions, or scheduled breaks, the fixed-speed compressor continues running at full speed, venting excess compressed air and consuming near-full power. On installations where unloaded running time exceeds 20% of total operating hours — common in multi-product blowing facilities — this waste becomes a significant and ongoing expense.
The EP-CM75GPV eliminates this waste through the combination of two mechanisms. First, the permanent magnet VSD system adjusts compressor speed continuously from 40% to 100% of rated output, tracking air demand in real time and consuming only the power needed to maintain the target pressure setpoint. Second, the dual-motor configuration enables full motor staging: at low demand, one motor can be completely switched off while the other continues operating, delivering the energy profile of a 37 kW machine rather than a 75 kW machine during partial-load periods.
Ten-Year Cost of Ownership: VSD vs Fixed Speed
| Cost Category | Fixed-Speed Model | EP-CM75GPV (VSD) |
|---|---|---|
| Electricity (10yr, % of total) | ~80% | ~45% (35% electricity saving) |
| Purchase cost (% of total) | 10% | 10% |
| Maintenance (% of total) | 10% | 10% |
| Electricity saving (10yr) | Baseline | 35% of electricity cost |
Key Features of the EP-CM75GPV
⚡ Permanent Magnet VSD — Up to 97% Motor Efficiency
The dual permanent magnet synchronous motors achieve motor efficiency up to 97% across the operating speed range — well above standard asynchronous motors. Combined with VSD control, the system delivers the required pressure at minimum specific power (kW per m³/min) under all load conditions, from full production to standby.
Water Lubrication — Class 0 at 40 Bar
Water performs all lubrication, sealing, and cooling functions inside the compression chamber. No oil is present anywhere in the system. The air end operates at only ambient +15°C, enabling isothermal compression and guaranteeing ISO 8573-1 Class 0 oil-free air output that is structurally maintained — not dependent on filter performance or maintenance compliance.
Dual-Motor Load Staging
The two independent 37 kW motors can operate simultaneously at full combined output or in staged configurations where one motor runs while the other is off. The intelligent PLC controller determines the optimal motor combination for every demand scenario, providing both energy efficiency and redundancy — 50% capacity continues even during single-motor maintenance.
IoT Monitoring System
The EP-CM75GPV comes standard with an IoT monitoring system supporting remote start/stop, real-time parameter monitoring, and alarm notification via connected devices. This enables plant managers to monitor compressed air system performance from outside the production floor and respond to fault conditions before they affect blowing line output.
Narrow Pressure Band Control ±0.1 MPa
The advanced Schneider Electric control system adjusts motor speed in real time to maintain system pressure within a ±0.1 MPa band around the setpoint. This tight pressure control eliminates the wide pressure fluctuations common in on/off fixed-speed systems, protecting blow molds from pressure spike damage and ensuring consistent bottle wall thickness across production runs.
Minimal Maintenance Design
The entire machine is designed with no wearing parts in the conventional sense. Star wheel blades are manufactured from aviation-grade materials with confidential configurations that solve the wear problem inherent in conventional designs. Daily maintenance consists only of air filter and water filter replacement — no oil changes, no oil separator cartridges, no coalescer elements.
System Flow: Air-Cooled Configuration for the EP-CM75GPV
For facilities without cooling tower infrastructure, the EP-CM75GPV air-cooled configuration provides a self-contained installation that requires only electrical connection and compressed air outlet piping. The air-cooled heat rejection system is engineered to maintain discharge temperatures below 55°C in ambient conditions up to 40°C, ensuring year-round reliable operation in tropical and subtropical climates common in Southeast Asia, South America, and the Middle East — regions where PET bottle production is growing rapidly.
Manufacturing Quality & Factory Capability
The EP-CM75GPV is assembled and tested in Ever Power's 68,000 m² manufacturing facility, which has been producing oil-free compressor technology since 1960 and water-lubricated oil-free screw compressors since 2005. Every unit undergoes full-load performance testing across the complete working pressure range (2.0–4.0 MPa), calibrated acoustic measurement, VSD control logic verification including demand-tracking response testing, and leak inspection of all water-circuit connections before release. The facility maintains marketing networks in over 50 countries including South Korea, the United States, Thailand, and markets across Europe and Latin America. For more information about Ever Power's engineering history and capabilities, visit our company page.
Customer Case Studies
Netherlands — Multi-Format Beverage Bottler
Industry: Beverage | Application: 40 bar VSD air supply for high-speed rotary blowing line producing 5 bottle formats
"Our rotary blowing line cycles through five bottle formats daily, each requiring slightly different blow pressures and each creating a different demand profile on the compressor. The EP-CM75GPV's VSD system tracks these changes continuously. We measured a 33% reduction in compressor electricity consumption in the first year compared to our previous fixed-speed installation — translating to significant annual savings. The IoT monitoring system also allows our engineering team to monitor the compressor remotely during night shifts."
★★★★★
Colombia — Carbonated Soft Drink Producer
Industry: Carbonated Beverages | Application: 40 bar oil-free air for PET CSD bottle blowing with seasonal demand variation
"Our production volumes vary significantly between peak and off-peak seasons. With our previous fixed-speed compressor, electricity cost was nearly the same regardless of how many bottles we produced. The EP-CM75GPV has transformed this — during low-season operation, the VSD reduces to 45% speed and our compressor electricity bill drops accordingly. The dual-motor design also means we have never had a complete compressor shutdown, even when one motor was serviced."
★★★★★
Thailand — Cosmetics & Personal Care Bottling
Industry: Cosmetics Packaging | Application: 35 bar VSD oil-free air for PET and PETG cosmetic bottle blowing in tropical climate
"We operate in 38°C ambient conditions, which was a concern for air-cooled compressor performance. The EP-CM75GPV's cooling system maintains stable discharge temperatures even in our climate. The water-lubricated technology also means our cosmetic product has zero risk of oil contamination from the air supply — critical for a brand that markets on purity and sustainability. The VSD efficiency gain was an unexpected bonus that reduced our operating cost below our initial projection."
★★★★★
Frequently Asked Questions
Cut Your Blowing Line Energy Cost by 35%
Beverage producers, cosmetics bottlers, and food packaging manufacturers across the Netherlands, Colombia, Thailand, and 50+ markets use Ever Power VSD water-lubricated compressors to combine Class 0 oil-free air purity with industry-leading energy efficiency. Send us your blowing machine specifications and annual production hours — our engineers will calculate your projected electricity saving and confirm system fit within 48 hours.
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