Oil-Injected Rotary Screw Air Compressors
CMN/A Fixed-Speed & CMN/PV Permanent Magnet VSD Series
Two series of industrial oil-injected rotary screw air compressors covering 10–340 HP, operating pressures from 116 to 232 PSI, and free-air delivery reaching approximately 1,500+ CFM. Residual oil carryover ≤ 2 ppm. Designed for continuous industrial operation in ambient temperatures up to 55°C / 131°F.
compressor series
Choose Your Compressor Series: Fixed-Speed or PM VSD
Both series use oil-injected rotary screw airend technology with a shaft-seal-free design and ≤ 2 ppm residual oil carryover. The difference is how each manages motor speed — and that affects how well each matches your operating pattern.
Model Range
CMN/A Series
Fixed-Speed Oil-Injected Rotary Screw Compressors
The CMN/A runs at a constant motor speed. Air delivery is controlled through an inlet valve and load/unload cycling. This is a straightforward, well-proven control architecture suited to operations where compressed air demand is relatively stable throughout the production cycle.
CMN/A Series
Fixed-SpeedTypically suited for:
- Stable, predictable compressed air demand
- Long continuous production cycles near full load
- Applications with simpler control requirements
- Facilities evaluating total investment vs. operating hours
Model Range
CMN/PV Series
Permanent Magnet VSD Oil-Injected Rotary Screw Compressors
The CMN/PV uses a permanent magnet synchronous motor (PMSM) controlled by a variable frequency drive. Motor speed adjusts continuously to match actual air demand. When demand drops, motor speed decreases — the compressor delivers closer to what is actually required rather than load/unload cycling.
CMN/PV Series
PM VSDTypically suited for:
- Variable or shifting air demand across the day or between shifts
- Production lines with frequent load changes
- Facilities where compressor runs at partial load for extended periods
- Operations where tighter pressure control reduces downstream waste
Engineering Comparison
Fixed-Speed vs. Permanent Magnet VSD: Engineering Comparison
The right choice depends on your specific demand profile, operating hours, and electrical environment — not a blanket rule. This table outlines the engineering differences to help frame that decision.
| Attribute | CMN/A — Fixed-Speed | CMN/PV — PM VSD |
|---|---|---|
| Motor type | Standard induction motor at constant speed | Permanent magnet synchronous motor (PMSM) with VFD speed control |
| Demand profile match | Fixed output — load/unload valve controls delivery | Motor speed adjusts continuously to track actual demand |
| Part-load operation | Motor continues running at full speed during unloaded periods, energy is consumed without producing air | Motor slows proportionally; energy draw reduces when output is below maximum |
| Pressure control | Wider pressure band between load and unload setpoints | Tighter pressure band; delivery tracks setpoint more closely |
| Initial investment | Generally lower purchase cost | Higher initial cost due to VFD and PMSM |
| Control architecture | Simpler — mechanical inlet valve, standard controls | More complex — VFD, motor driver, inverter thermal management |
| Best operating pattern | High utilization factor; demand consistently near rated capacity; minimal variation across shifts | Demand varies across the shift or between production modes; meaningful idle or part-load periods |
| Typical application examples | Dedicated process lines, continuous manufacturing, high-duty sandblasting | Multi-shift production, facilities with varying tool usage, systems serving mixed processes |
Engineering Features That Affect Compressor Performance
These are the design characteristics that factory-stated data supports. Each point is explained in terms of its engineering basis and what it means operationally.
Shaft-Seal-Free Airend Architecture
Conventional rotary screw airends use a shaft seal where the drive shaft exits the compression chamber — a known potential leak point for oil. The CMN airend eliminates this conventional shaft-seal leakage path, removing one source of potential external oil migration. This affects long-term oil system integrity and reduces one maintenance-related inspection point.
Designed for High Free-Air Delivery
The airend rotor geometry is engineered to increase free-air delivery for a given installed motor size. Manufacturer-stated data indicates improved volumetric output relative to conventional designs under specified test conditions — specific test basis and reference conditions available upon request. Do not interpret this as a direct competitive comparison without confirmed data.
≤ 2 ppm Residual Oil Carryover
After the air/oil separation stage, residual oil carryover is manufacturer-stated at ≤ 2 ppm by weight. This is the carryover level at the compressor outlet — it is not an "oil-free" classification. Final air quality at point-of-use depends on the downstream treatment system (dryer, coalescing filter, activated carbon filter) and the applicable ISO 8573 air quality requirements for your process.
High-Ambient Operation — Up to 55°C / 131°F
Manufacturer-stated ambient temperature rating is continuous operation up to 55°C (131°F). Maximum unit operating temperature is stated as ≤ 92°C (198°F). This is relevant for hot production environments, facilities without full climate control, and installations in warm-climate regions. Adequate ventilation and cooling airflow to the installation space remain necessary regardless of ambient rating.
Air-Cooled Cooling System
Both series use an air-cooled cooling system with a dedicated cooling fan. Fan motor power ranges from 0.12 kW (smaller models) up to 5.5 kW × 2 fans on the 250 kW models. Adequate installation space for cooling airflow is required — the machine must not recirculate its own exhaust air. Consult dimensional data for minimum clearance requirements.
Continuous Industrial Operation
Rotary screw compressors are designed for 100% duty cycle — continuous running is their normal operating state. The CMN series is intended for sustained industrial production environments. Unlike reciprocating piston compressors, these units are not designed for intermittent start-stop cycling as a primary control strategy.
What Does “Micro-Oil” Mean — and Is It Oil-Free?
Direct answer: A micro-oil screw compressor is an oil-injected (oil-lubricated) rotary screw compressor with an advanced oil separation system that achieves low residual oil carryover — typically ≤ 2 ppm at the outlet. It is not an oil-free compressor. Oil is present in the compression chamber during every compression cycle.
In a micro-oil (oil-injected) rotary screw compressor, oil is deliberately introduced into the compression chamber. It serves four functions simultaneously: it lubricates the rotor contact zones, seals the small clearances between the male and female rotors, removes heat generated during compression, and damps mechanical noise. After the compression stage, the air/oil mixture passes through a multi-stage separation system — centrifugal separation followed by a coalescing separator element. Most of the oil is recovered and recirculated. Residual carryover in the compressed air is what the ≤ 2 ppm specification describes.
“Micro-oil” refers to that low residual carryover figure — it does not mean the air is oil-free. For applications requiring oil-free compressed air (pharmaceutical, food-direct contact, electronics manufacturing, ISO 8573-1 Class 0), an oil-free air compressor is required.
| Characteristic | Micro-Oil (Oil-Injected) | Oil-Free Compressor |
|---|---|---|
| Compression chamber lubrication | Oil injected — present during compression | No oil in the compression chamber |
| Residual oil at outlet | ≤ 2 ppm (manufacturer-stated) — not zero | Typically ISO 8573-1 Class 0 achievable |
| Typical applications | General manufacturing, pneumatic tools, sandblasting, conveying, automation | Food contact, pharma, electronics, paint-line (where zero oil is required) |
| Air treatment needed | Dryer, coalescing filter, activated carbon for sensitive processes | Dryer and particulate filter; no oil-removal filtration required |
| Typical purchase cost | Lower for equivalent HP/kW | Higher; multi-stage or dry-screw technology |
How an Oil-Injected Rotary Screw Air Compressor Works
Understanding the compression cycle helps explain both the performance characteristics and the role each component plays in the system.
Air enters the compressor package from the surrounding environment.
A multi-stage intake filter removes airborne particulates before they reach the airend.
The inlet valve controls the volume of admitted air. Fixed-speed units modulate flow; VSD units reduce the need for heavy throttling.
Oil Injection
Male and female helical rotors mesh to reduce air volume and compress it. Oil continuously lubricates, seals internal clearances and absorbs heat of compression.
The discharged air-oil mixture enters the separator, where centrifugal action and a coalescing element remove the bulk of the oil from the air stream.
Compressed air passes through the aftercooler to reduce discharge temperature, and condensed moisture is removed downstream.
Outlet
Clean compressed air leaves the package for the plant air system and any downstream dryers or filters.
Compression
Cycle Summary
Oil injection improves lubrication, sealing and cooling.
Single-stage compression achieves high efficiency without intercooling.
Recovered oil is filtered, cooled and recirculated.
Final air treatment such as dryers and filters occurs downstream.
Technical Specifications
Full parameter data for both series. CFM, PSI, and HP are primary. Metric units included for reference. Data transcribed from manufacturer technical documentation.
Technical Specifications
Full parameter data for both series. CFM, PSI, and HP are primary. Metric units included for reference. Data transcribed from manufacturer technical documentation.
| Model | Working Pressure | FAD (Free Air Delivery) | Power | Noise | Oil Carryover | Weight | Cooling Fan | Air Outlet | Dimensions L×W×H | |||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| MPa / bar | PSI | m³/min | CFM | kW | HP | dB(A) | PPM | kg | kW | inch / DN | mm | |
| CMN08A — 10 HP / 7.5 kW | ||||||||||||
| CMN08A | 0.8 / 8 | 116 | 1.31 | 46 | 7.5 | 10 | 62 | ≤2 | 302 | 0.12×1 | 3/4" | 990×640×980 |
| CMN08A | 1.0 / 10 | 145 | 1.11 | 39 | 7.5 | 10 | 62 | ≤2 | 302 | 0.12×1 | 3/4" | 990×640×980 |
| CMN11A — 15 HP / 11 kW | ||||||||||||
| CMN11A | 0.8 / 8 | 116 | 1.81 | 64 | 11 | 15 | 62 | ≤2 | 322 | 0.12×1 | 3/4" | 990×640×980 |
| CMN11A | 1.0 / 10 | 145 | 1.52 | 54 | 11 | 15 | 62 | ≤2 | 322 | 0.12×1 | 3/4" | 990×640×980 |
| CMN11A | 1.25 / 12.5 | 181 | 1.35 | 48 | 11 | 15 | 62 | ≤2 | 322 | 0.12×1 | 3/4" | 990×640×980 |
| CMN15A — 20 HP / 15 kW | ||||||||||||
| CMN15A | 0.8 / 8 | 116 | 2.60 | 92 | 15 | 20 | 63 | ≤2 | 505 | 0.37×1 | 1" | 1250×790×1290 |
| CMN15A | 1.0 / 10 | 145 | 2.35 | 83 | 15 | 20 | 63 | ≤2 | 505 | 0.37×1 | 1" | 1250×790×1290 |
| CMN15A | 1.25 / 12.5 | 181 | 1.73 | 61 | 15 | 20 | 63 | ≤2 | 505 | 0.37×1 | 1" | 1250×790×1290 |
| CMN18A — 25 HP / 18.5 kW | ||||||||||||
| CMN18A | 0.8 / 8 | 116 | 1.21 | 43 | 18.5 | 25 | 65 | ≤2 | 535 | 0.37×1 | 1" | 1250×790×1290 |
| CMN18A | 1.0 / 10 | 145 | 3.30 | 117 | 18.5 | 25 | 65 | ≤2 | 535 | 0.37×1 | 1" | 1250×790×1290 |
| CMN18A | 1.25 / 12.5 | 181 | 2.90 | 102 | 18.5 | 25 | 65 | ≤2 | 535 | 0.37×1 | 1" | 1250×790×1290 |
| CMN18A | 1.6 / 16 | 232 | 2.40 | 85 | 18.5 | 25 | 65 | ≤2 | 535 | 0.37×1 | 1" | 1250×790×1290 |
| CMN22A — 30 HP / 22 kW | ||||||||||||
| CMN22A | 0.8 / 8 | 116 | 3.90 | 138 | 22 | 30 | 65 | ≤2 | 565 | 0.37×1 | 1" | 1250×790×1290 |
| CMN22A | 1.0 / 10 | 145 | 3.50 | 124 | 22 | 30 | 65 | ≤2 | 565 | 0.37×1 | 1" | 1250×790×1290 |
| CMN22A | 1.25 / 12.5 | 181 | 2.90 | 102 | 22 | 30 | 65 | ≤2 | 565 | 0.37×1 | 1" | 1250×790×1290 |
| CMN22A | 1.6 / 16 | 232 | 2.40 | 85 | 22 | 30 | 65 | ≤2 | 565 | 0.37×1 | 1" | 1250×790×1290 |
| CMN30A — 40 HP / 30 kW | ||||||||||||
| CMN30A | 0.8 / 8 | 116 | 4.92 | 174 | 30 | 40 | 66 | ≤2 | 730 | 1.3×1 | 1-1/2" | 1500×950×1420 |
| CMN30A | 1.0 / 10 | 145 | 4.22 | 149 | 30 | 40 | 66 | ≤2 | 730 | 1.3×1 | 1-1/2" | 1500×950×1420 |
| CMN30A | 1.25 / 12.5 | 181 | 3.81 | 135 | 30 | 40 | 66 | ≤2 | 730 | 1.3×1 | 1-1/2" | 1500×950×1420 |
| CMN30A | 1.6 / 16 | 232 | 3.04 | 107 | 30 | 40 | 66 | ≤2 | 730 | 1.3×1 | 1-1/2" | 1500×950×1420 |
| CMN37A — 50 HP / 37 kW | ||||||||||||
| CMN37A | 0.8 / 8 | 116 | 6.30 | 222 | 37 | 50 | 67 | ≤2 | 770 | 1.3×1 | 1-1/2" | 1500×950×1420 |
| CMN37A | 1.0 / 10 | 145 | 5.50 | 194 | 37 | 50 | 67 | ≤2 | 770 | 1.3×1 | 1-1/2" | 1500×950×1420 |
| CMN37A | 1.25 / 12.5 | 181 | 5.10 | 180 | 37 | 50 | 67 | ≤2 | 770 | 1.3×1 | 1-1/2" | 1500×950×1420 |
| CMN37A | 1.6 / 16 | 232 | 3.60 | 127 | 37 | 50 | 67 | ≤2 | 770 | 1.3×1 | 1-1/2" | 1500×950×1420 |
| CMN45A — 60 HP / 45 kW | ||||||||||||
| CMN45A | 0.8 / 8 | 116 | 7.60 | 265 | 45 | 60 | 68 | ≤2 | 1196 | 1.8×1 | 2" | 1850×1105×1600 |
| CMN45A | 1.0 / 10 | 145 | 6.30 | 222 | 45 | 60 | 68 | ≤2 | 1196 | 1.8×1 | 2" | 1850×1105×1600 |
| CMN45A | 1.25 / 12.5 | 181 | 5.84 | 206 | 45 | 60 | 68 | ≤2 | 1196 | 1.8×1 | 2" | 1850×1105×1600 |
| CMN45A | 1.6 / 16 | 232 | 4.53 | 160 | 45 | 60 | 68 | ≤2 | 1196 | 1.8×1 | 2" | 1850×1105×1600 |
| CMN55A — 75 HP / 55 kW | ||||||||||||
| CMN55A | 0.8 / 8 | 116 | 10.30 | 364 | 55 | 75 | 70 | ≤2 | 1290 | 1.8×1 | 2" | 1850×1105×1600 |
| CMN55A | 1.0 / 10 | 145 | 9.10 | 321 | 55 | 75 | 70 | ≤2 | 1290 | 1.8×1 | 2" | 1850×1105×1600 |
| CMN55A | 1.25 / 12.5 | 181 | 7.60 | 268 | 55 | 75 | 70 | ≤2 | 1290 | 1.8×1 | 2" | 1850×1105×1600 |
| CMN55A | 1.6 / 16 | 232 | 5.80 | 205 | 55 | 75 | 70 | ≤2 | 1290 | 1.8×1 | 2" | 1850×1105×1600 |
| CMN75A — 100 HP / 75 kW | ||||||||||||
| CMN75A | 0.8 / 8 | 116 | 12.50 | 445 | 75 | 100 | 73 | ≤2 | 1570 | 2.2×1 | 2" | 1900×1200×1660 |
| CMN75A | 1.0 / 10 | 145 | 11.50 | 406 | 75 | 100 | 73 | ≤2 | 1570 | 2.2×1 | 2" | 1900×1200×1660 |
| CMN75A | 1.25 / 12.5 | 181 | 9.94 | 351 | 75 | 100 | 73 | ≤2 | 1570 | 2.2×1 | 2" | 1900×1200×1660 |
| CMN75A | 1.6 / 16 | 232 | 6.90 | 244 | 75 | 100 | 73 | ≤2 | 1570 | 2.2×1 | 2" | 1900×1200×1660 |
| CMN90A — 125 HP / 90 kW | ||||||||||||
| CMN90A | 0.8 / 8 | 116 | 16.11 | 569 | 90 | 125 | 73 | ≤2 | 2270 | 0.37×1 | DN65 | 2000×1320×1905 |
| CMN90A | 1.0 / 10 | 145 | 14.52 | 513 | 90 | 125 | 73 | ≤2 | 2270 | 4×1 | DN65 | 2000×1320×1905 |
| CMN90A | 1.25 / 12.5 | 181 | 12.30 | 434 | 90 | 125 | 73 | ≤2 | 2270 | 4×1 | DN65 | 2000×1320×1905 |
| CMN90A | 1.6 / 16 | 232 | 9.50 | 335 | 90 | 125 | 73 | ≤2 | 2270 | 4×1 | DN65 | 2000×1320×1905 |
| CMN110A — 150 HP / 110 kW | ||||||||||||
| CMN110A | 0.8 / 8 | 116 | 20.10 | 710 | 110 | 150 | 78 | ≤2 | 2290 | 0.37×1 | DN65 | 2000×1370×1980 |
| CMN110A | 1.0 / 10 | 145 | 17.10 | 604 | 110 | 150 | 78 | ≤2 | 2290 | 4×1 | DN65 | 2000×1370×1980 |
| CMN110A | 1.25 / 12.5 | 181 | 15.22 | 537 | 110 | 150 | 78 | ≤2 | 2290 | 4×1 | DN65 | 2000×1370×1980 |
| CMN110A | 1.6 / 16 | 232 | 11.60 | 410 | 110 | 150 | 78 | ≤2 | 2290 | 4×1 | DN65 | 2000×1370×1980 |
| CMN132A — 180 HP / 132 kW | ||||||||||||
| CMN132A | 0.8 / 8 | 116 | 23.10 | 816 | 132 | 180 | 78 | ≤2 | 2550 | 0.37×1 | DN65 | 2000×1370×1980 |
| CMN132A | 1.0 / 10 | 145 | 20.38 | 720 | 132 | 180 | 78 | ≤2 | 2550 | 4×1 | DN65 | 2000×1370×1980 |
| CMN132A | 1.25 / 12.5 | 181 | 18.29 | 646 | 132 | 180 | 78 | ≤2 | 2550 | 4×1 | DN65 | 2000×1370×1980 |
| CMN132A | 1.6 / 16 | 232 | [DATA TO CONFIRM] | [DATA TO CONFIRM] | 132 | 180 | 78 | ≤2 | 2550 | 4×1 | DN65 | 2000×1370×1980 |
| CMN160A — 220 HP / 160 kW | ||||||||||||
| CMN160A | 0.8 / 8 | 116 | 28.85 | 1019 | 160 | 220 | 78 | ≤2 | 3800 | 3.5×2 | DN80 | 2950×1720×2350 |
| CMN160A | 1.0 / 10 | 145 | 24.52 | 866 | 160 | 220 | 78 | ≤2 | 3800 | 3.5×2 | DN80 | 2950×1720×2350 |
| CMN160A | 1.25 / 12.5 | 181 | 22.17 | 783 | 160 | 220 | 78 | ≤2 | 3800 | 3.5×2 | DN80 | 2950×1720×2350 |
| CMN160A | 1.6 / 16 | 232 | 19.10 | 674 | 160 | 220 | 78 | ≤2 | 3800 | 3.5×2 | DN80 | 2950×1720×2350 |
| CMN200A — 270 HP / 200 kW | ||||||||||||
| CMN200A | 0.8 / 8 | 116 | 36.63 | 1293 | 200 | 270 | 78 | ≤2 | 4100 | 5.5×2 | DN100 | 3100×1800×2322 |
| CMN200A | 1.0 / 10 | 145 | 32.70 | 1155 | 200 | 270 | 78 | ≤2 | 4100 | 5.5×2 | DN100 | 3100×1800×2322 |
| CMN200A | 1.25 / 12.5 | 181 | 27.72 | 979 | 200 | 270 | 78 | ≤2 | 4100 | 5.5×2 | DN100 | 3100×1800×2322 |
| CMN200A | 1.6 / 16 | 232 | 21.90 | 773 | 200 | 270 | 78 | ≤2 | 4100 | 5.5×2 | DN100 | 3100×1800×2322 |
| CMN250A — 340 HP / 250 kW | ||||||||||||
| CMN250A | 0.8 / 8 | 116 | 42.88 | 1514 | 250 | 340 | 78 | ≤2 | 4500 | 5.5×2 | DN100 | 3100×1800×2322 |
| CMN250A | 1.0 / 10 | 145 | 39.00 | 1377 | 250 | 340 | 78 | ≤2 | 4500 | 5.5×2 | DN100 | 3100×1800×2322 |
| CMN250A | 1.25 / 12.5 | 181 | 34.64 | 1223 | 250 | 340 | 78 | ≤2 | 4500 | 5.5×2 | DN100 | 3100×1800×2322 |
| CMN250A | 1.6 / 16 | 232 | 27.40 | 967 | 250 | 340 | 78 | ≤2 | 4500 | 5.5×2 | DN100 | 3100×1800×2322 |
Gas supply (compressed air delivery) temperature: ≤ ambient + 15°C. Oil carryover ≤ 2 ppm applies across the range (manufacturer-stated). Performance values are subject to operating conditions and final technical confirmation. Test basis available upon request.
| Model | Working Pressure | FAD Range (VSD) | Power | Noise | Oil Carryover | Weight | Cooling Fan | Air Outlet | Dimensions L×W×H | |||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| MPa / bar | PSI | m³/min | CFM | kW | HP | dB(A) | PPM | kg | kW | inch / DN | mm | |
| CMN08PV — 10 HP / 7.5 kW PM VSD | ||||||||||||
| CMN08PV | 0.8 / 8 | 116 | 0.34–1.38 | 12–49 | 7.5 | 10 | 62 | ≤2 | 317 | 0.12×1 | 3/4" | 990×640×980 |
| CMN08PV | 1.0 / 10 | 145 | 0.23–1.17 | 10–41 | 7.5 | 10 | 62 | ≤2 | 317 | 0.12×1 | 3/4" | 990×640×980 |
| CMN08PV | 1.25 / 12.5 | 181 | 0.20–0.67 [DATA TO CONFIRM range end] | — | 7.5 | 10 | 62 | ≤2 | 317 | 0.12×1 | 3/4" | 990×640×980 |
| CMN11PV — 15 HP / 11 kW PM VSD | ||||||||||||
| CMN11PV | 0.8 / 8 | 116 | 0.48–1.90 | 17–67 | 11 | 15 | 62 | ≤2 | 337 | 0.12×1 | 3/4" | 990×640×980 |
| CMN11PV | 1.0 / 10 | 145 | 0.40–1.60 | 14–57 | 11 | 15 | 62 | ≤2 | 337 | 0.12×1 | 3/4" | 990×640×980 |
| CMN11PV | 1.25 / 12.5 | 181 | 0.35–1.42 | 12–50 | 11 | 15 | 62 | ≤2 | 337 | 0.12×1 | 3/4" | 990×640×980 |
| CMN15PV — 20 HP / 15 kW PM VSD | ||||||||||||
| CMN15PV | 0.8 / 8 | 116 | 0.68–2.73 | 24–96 | 15 | 20 | 63 | ≤2 | 635 | 0.55×1 | 1" | 1520×900×1460 |
| CMN15PV | 1.0 / 10 | 145 | 0.65–2.50 | 23–88 | 15 | 20 | 63 | ≤2 | 635 | 0.55×1 | 1" | 1520×900×1460 |
| CMN15PV | 1.25 / 12.5 | 181 | 0.43–1.80 | 15–64 | 15 | 20 | 63 | ≤2 | 635 | 0.55×1 | 1" | 1520×900×1460 |
| CMN15PV | 1.6 / 16 | 232 | 0.33–1.30 | 12–46 | 15 | 20 | 63 | ≤2 | 635 | 0.55×1 | 1" | 1520×900×1460 |
| CMN18PV — 25 HP / 18.5 kW PM VSD | ||||||||||||
| CMN18PV | 0.8 / 8 | 116 | 0.88–3.50 | 31–124 | 18.5 | 25 | 65 | ≤2 | 650 | 0.55×1 | 1" | 1520×900×1460 |
| CMN18PV | 1.0 / 10 | 145 | 0.78–3.10 | 28–109 | 18.5 | 25 | 65 | ≤2 | 650 | 0.55×1 | 1" | 1520×900×1460 |
| CMN18PV | 1.25 / 12.5 | 181 | 0.63–2.50 | 22–88 | 18.5 | 25 | 65 | ≤2 | 650 | 0.55×1 | 1" | 1520×900×1460 |
| CMN18PV | 1.6 / 16 | 232 | 0.44–1.75 | 16–62 | 18.5 | 25 | 65 | ≤2 | 650 | 0.55×1 | 1" | 1520×900×1460 |
| CMN22PV — 30 HP / 22 kW PM VSD | ||||||||||||
| CMN22PV | 0.8 / 8 | 116 | 1.03–4.10 | 36–145 | 22 | 30 | 65 | ≤2 | 665 | 0.55×1 | 1" | 1520×900×1460 |
| CMN22PV | 1.0 / 10 | 145 | 0.93–3.70 | 33–131 | 22 | 30 | 65 | ≤2 | 665 | 0.55×1 | 1" | 1520×900×1460 |
| CMN22PV | 1.25 / 12.5 | 181 | 0.78–3.10 | 28–109 | 22 | 30 | 65 | ≤2 | 665 | 0.55×1 | 1" | 1520×900×1460 |
| CMN22PV | 1.6 / 16 | 232 | 0.63–2.50 | 23–88 | 22 | 30 | 65 | ≤2 | 665 | 0.55×1 | 1" | 1520×900×1460 |
| CMN30PV — 40 HP / 30 kW PM VSD | ||||||||||||
| CMN30PV | 0.8 / 8 | 116 | 1.30–5.20 | 46–184 | 30 | 40 | 66 | ≤2 | 1010 | 1.3×1 | 1-1/2" | 1900×950×1620 |
| CMN30PV | 1.0 / 10 | 145 | 1.11–4.43 | 39–156 | 30 | 40 | 66 | ≤2 | 1010 | 1.3×1 | 1-1/2" | 1900×950×1620 |
| CMN30PV | 1.25 / 12.5 | 181 | 1.00–4.00 | 35–141 | 30 | 40 | 66 | ≤2 | 1010 | 1.3×1 | 1-1/2" | 1900×950×1620 |
| CMN30PV | 1.6 / 16 | 232 | 0.80–3.20 | 28–113 | 30 | 40 | 66 | ≤2 | 1010 | 1.3×1 | 1-1/2" | 1900×950×1620 |
| CMN37PV — 50 HP / 37 kW PM VSD | ||||||||||||
| CMN37PV | 0.8 / 8 | 116 | 1.65–6.60 | 58–233 | 37 | 50 | 67 | ≤2 | 1030 | 1.3×1 | 1-1/2" | 1900×950×1620 |
| CMN37PV | 1.0 / 10 | 145 | 1.45–5.80 | 51–205 | 37 | 50 | 67 | ≤2 | 1030 | 1.3×1 | 1-1/2" | 1900×950×1620 |
| CMN37PV | 1.25 / 12.5 | 181 | 1.33–5.40 | 47–191 | 37 | 50 | 67 | ≤2 | 1030 | 1.3×1 | 1-1/2" | 1900×950×1620 |
| CMN37PV | 1.6 / 16 | 232 | 0.95–3.80 | 34–134 | 37 | 50 | 67 | ≤2 | 1030 | 1.3×1 | 1-1/2" | 1900×950×1620 |
| CMN45PV — 60 HP / 45 kW PM VSD | ||||||||||||
| CMN45PV | 0.8 / 8 | 116 | 1.98–7.90 | 70–279 | 45 | 60 | 68 | ≤2 | 1176 | 1.8×1 | 2" | 2070×1100×1790 |
| CMN45PV | 1.0 / 10 | 145 | 1.65–6.60 | 58–233 | 45 | 60 | 68 | ≤2 | 1176 | 1.8×1 | 2" | 2070×1100×1790 |
| CMN45PV | 1.25 / 12.5 | 181 | 1.55–6.20 | 55–219 | 45 | 60 | 68 | ≤2 | 1176 | 1.8×1 | 2" | 2070×1100×1790 |
| CMN45PV | 1.6 / 16 | 232 | 1.20–4.80 | 42–169 | 45 | 60 | 68 | ≤2 | 1176 | 1.8×1 | 2" | 2070×1100×1790 |
| CMN55PV — 75 HP / 55 kW PM VSD | ||||||||||||
| CMN55PV | 0.8 / 8 | 116 | 2.70–10.80 | 95–381 | 55 | 75 | 70 | ≤2 | 1230 | 1.8×1 | 2" | 2070×1100×1790 |
| CMN55PV | 1.0 / 10 | 145 | 2.40–9.60 | 85–339 | 55 | 75 | 70 | ≤2 | 1230 | 1.8×1 | 2" | 2070×1100×1790 |
| CMN55PV | 1.25 / 12.5 | 181 | 2.00–8.00 | 71–282 | 55 | 75 | 70 | ≤2 | 1230 | 1.8×1 | 2" | 2070×1100×1790 |
| CMN55PV | 1.6 / 16 | 232 | 1.53–6.10 | 54–215 | 55 | 75 | 70 | ≤2 | 1230 | 1.8×1 | 2" | 2070×1100×1790 |
| CMN75PV — 100 HP / 75 kW PM VSD | ||||||||||||
| CMN75PV | 0.8 / 8 | 116 | 3.31–13.23 | 117–467 | 75 | 100 | 73 | ≤2 | 1440 | 2.2×1 | 2" | 2270×1200×1800 |
| CMN75PV | 1.0 / 10 | 145 | 3.03–12.10 | 107–427 | 75 | 100 | 73 | ≤2 | 1440 | 2.2×1 | 2" | 2270×1200×1800 |
| CMN75PV | 1.25 / 12.5 | 181 | 2.61–10.44 | 92–369 | 75 | 100 | 73 | ≤2 | 1440 | 2.2×1 | 2" | 2270×1200×1800 |
| CMN75PV | 1.6 / 16 | 232 | 1.81–7.25 | 64–256 | 75 | 100 | 73 | ≤2 | 1440 | 2.2×1 | 2" | 2270×1200×1800 |
| CMN90PV — 125 HP / 90 kW PM VSD | ||||||||||||
| CMN90PV | 0.8 / 8 | 116 | 4.23–16.90 | 149–597 | 90 | 125 | 73 | ≤2 | 1800 | 0.37×1 | DN65 | 2150×1340×2140 |
| CMN90PV | 1.0 / 10 | 145 | 3.81–15.25 | 135–538 | 90 | 125 | 73 | ≤2 | 1800 | 4×1 | DN65 | 2150×1340×2140 |
| CMN90PV | 1.25 / 12.5 | 181 | 3.23–12.90 | 114–456 | 90 | 125 | 73 | ≤2 | 1800 | 4×1 | DN65 | 2150×1340×2140 |
| CMN90PV | 1.6 / 16 | 232 | 2.50–10.00 | 88–353 | 90 | 125 | 73 | ≤2 | 1800 | 4×1 | DN65 | 2150×1340×2140 |
| CMN110PV — 150 HP / 110 kW PM VSD | ||||||||||||
| CMN110PV | 0.8 / 8 | 116 | 5.28–18.00 | 186–636 | 110 | 150 | 78 | ≤2 | 2080 | 0.37×1 | DN65 | 2150×1340×2140 |
| CMN110PV | 1.0 / 10 | 145 | 4.50–16.00 | 159–565 | 110 | 150 | 78 | ≤2 | 2080 | 4×1 | DN65 | 2150×1340×2140 |
| CMN110PV | 1.25 / 12.5 | 181 | 4.00–16.00 | 141–565 | 110 | 150 | 78 | ≤2 | 2080 | 4×1 | DN65 | 2150×1340×2140 |
| CMN110PV | 1.6 / 16 | 232 | 3.05–12.20 | 108–431 | 110 | 150 | 78 | ≤2 | 2080 | 4×1 | DN65 | 2150×1340×2140 |
| CMN132PV — 180 HP / 132 kW PM VSD | ||||||||||||
| CMN132PV | 0.8 / 8 | 116 | 6.08–24.30 | 215–858 | 132 | 180 | 78 | ≤2 | 2200 | 0.37×1 | DN65 | 2460×1370×1980 |
| CMN132PV | 1.0 / 10 | 145 | 5.35–21.40 | 188–756 | 132 | 180 | 78 | ≤2 | 2200 | 4×1 | DN65 | 2460×1370×1980 |
| CMN132PV | 1.25 / 12.5 | 181 | 4.80–19.20 | 169–678 | 132 | 180 | 78 | ≤2 | 2200 | 4×1 | DN65 | 2460×1370×1980 |
| CMN132PV | 1.6 / 16 | 232 | 3.98–15.90 | 141–561 | 132 | 180 | 78 | ≤2 | 2200 | 4×1 | DN65 | 2460×1370×1980 |
| CMN160PV — 220 HP / 160 kW PM VSD | ||||||||||||
| CMN160PV | 0.8 / 8 | 116 | 7.58–30.30 | 268–1,070 | 160 | 220 | 78 | ≤2 | 4000 | 3.5×2 | DN80 | 2950×1720×2350 |
| CMN160PV | 1.0 / 10 | 145 | 6.45–25.80 | 228–911 | 160 | 220 | 78 | ≤2 | 4000 | 3.5×2 | DN80 | 2950×1720×2350 |
| CMN160PV | 1.25 / 12.5 | 181 | 5.83–23.30 | 206–823 | 160 | 220 | 78 | ≤2 | 4000 | 3.5×2 | DN80 | 2950×1720×2350 |
| CMN200PV — 270 HP / 200 kW PM VSD | ||||||||||||
| CMN200PV | 0.8 / 8 | 116 | 9.63–38.50 | 340–1,359 | 200 | 270 | 78 | ≤2 | 4200 | 5.5×2 | DN100 | 3270×1800×2322 |
| CMN200PV | 1.0 / 10 | 145 | 8.60–34.40 | 304–1,215 | 200 | 270 | 78 | ≤2 | 4200 | 5.5×2 | DN100 | 3270×1800×2322 |
| CMN200PV | 1.25 / 12.5 | 181 | 7.30–29.10 | 258–1,028 | 200 | 270 | 78 | ≤2 | 4200 | 5.5×2 | DN100 | 3270×1800×2322 |
| CMN250PV — 340 HP / 250 kW PM VSD | ||||||||||||
| CMN250PV | 0.8 / 8 | 116 | 11.10–44.20 | 392–1,561 | 250 | 340 | 78 | ≤2 | 4450 | 5.5×2 | DN100 | 3270×1800×2322 |
| CMN250PV | 1.0 / 10 | 145 | 10.00–40.20 | 353–1,420 | 250 | 340 | 78 | ≤2 | 4450 | 5.5×2 | DN100 | 3270×1800×2322 |
| CMN250PV | 1.25 / 12.5 | 181 | 8.93–35.70 | 315–1,261 | 250 | 340 | 78 | ≤2 | 4450 | 5.5×2 | DN100 | 3270×1800×2322 |
FAD values shown as manufacturer-stated operating range at rated pressure. Gas supply temperature: ≤ ambient + 15°C. Oil carryover ≤ 2 ppm applies across the range (manufacturer-stated). CMN/PV delivers variable output across the stated range as motor speed modulates to match demand. Performance values are subject to operating conditions and final technical confirmation. Test basis available upon request.
Quick Reference
Application Matrix — Oil-Injected Rotary Screw Compressors
The series recommendations below reflect typical demand patterns for each application and should be verified against your actual operating conditions.
Series recommendations indicate typical suitability based on demand patterns described. Final selection should be confirmed against your actual measured flow, pressure, and operating profile. “Oil-injected” compressed air used in food-contact or pharmaceutical processes requires engineering confirmation of the full air treatment system.
General Manufacturing
Pneumatic Tools
Sandblasting
Spray Painting
Industrial Automation
Pneumatic Conveying
Metal Fabrication
Packaging
Quick Reference
Application Matrix — Oil-Injected Rotary Screw Compressors
The series recommendations below reflect typical demand patterns for each application and should be verified against your actual operating conditions.
Engineering Questions
Frequently Asked Questions
What is an oil-injected rotary screw air compressor?
An oil-injected rotary screw air compressor compresses air using two helical rotors (male and female) that turn in opposite directions inside a precision housing. Oil is injected into the compression chamber during every cycle — it lubricates the rotor contact zones, seals internal clearances to minimize leakback, cools the air during compression, and reduces mechanical noise. After compression, a multi-stage separation system recovers and recirculates the oil. The compressed air exits with a small residual oil carryover, which is then addressed by downstream filters. “Oil-injected,” “oil-lubricated,” and “oil-flooded” all describe the same technology — the oil is in the compression chamber.
What does "micro-oil screw compressor" mean?
“Micro-oil” refers to the low residual oil carryover achieved after the air/oil separation stage — typically ≤ 2 ppm by weight at the compressor outlet. It indicates that the separation system is effective at recovering oil from the compressed air stream. It does not mean the compressor operates without oil — oil is injected into the compression chamber during every cycle. The term describes the carryover level, not the compression mechanism.
When should I choose a permanent magnet VSD air compressor?
A PM VSD compressor is typically advantageous when: air demand varies meaningfully across the shift or between production modes; the compressor would otherwise run unloaded for a significant portion of its operating hours; a tighter system pressure band is beneficial (VSD maintains pressure more precisely than a fixed-speed load/unload cycle); or operating hours are high enough that energy savings over time offset the higher purchase cost. If your demand is consistently close to the compressor’s rated output and varies little, the energy advantage of VSD is smaller and the economics may favor fixed-speed.
How do I calculate how many CFM my plant needs?
The most accurate approach is a measured demand survey on an existing system using a data logger to record actual consumption over a representative production period. For new installations, list all pneumatic tools and equipment by CFM requirement and apply a diversity factor reflecting how many items operate simultaneously. Summing all nameplate CFM ratings significantly overestimates actual demand. Add 20–30% for system leaks, pressure drop across treatment equipment, and future capacity margin. Contact us with your equipment list and we can assist with the sizing calculation.
What does ≤ 2 ppm oil carryover mean for my process?
≤ 2 ppm (parts per million by weight) is the manufacturer-stated maximum residual oil content in the compressed air at the compressor outlet, after the air/oil separation stage. This is not zero — it is a low but measurable level. For general pneumatic tools and most industrial automation, this level is typically acceptable, particularly with a standard coalescing filter downstream. For applications with low oil tolerance — spray painting, precision instrumentation, food-adjacent processes, electronics — the final air quality must be confirmed against the ISO 8573-1 class required by the process, and the downstream treatment system must be designed accordingly.
Is a micro-oil screw compressor oil-free?
No. A micro-oil screw compressor is an oil-injected (oil-lubricated) compressor. Oil is present in the compression chamber throughout operation. The “micro” qualifier refers to the low residual oil carryover at the outlet — ≤ 2 ppm — not the absence of oil. If your application requires ISO 8573-1 Class 0 oil-free air (pharmaceutical, food-direct contact, certain electronics), a true oil-free compressor is required. For most general manufacturing, pneumatic tools, and industrial processes, ≤ 2 ppm at the compressor outlet — with appropriate downstream filtration — is adequate; confirm with your process specification.
What is the difference between fixed-speed and VSD rotary screw compressors?
A fixed-speed compressor runs its motor at a single constant speed. Air delivery is regulated by an inlet valve and load/unload cycling. When demand drops below the compressor’s output, the machine unloads — the motor continues running at full speed, but no useful air is produced. A VSD (variable speed drive) compressor adjusts motor speed continuously to match actual demand. When demand decreases, the motor slows and power consumption reduces proportionally. The trade-off is higher initial cost and more complex electronics. Fixed-speed is often cost-effective when demand stays consistently near full capacity; VSD typically shows greater energy benefit when the compressor runs at partial load for extended periods.
Can the CMN compressor operate at 131°F / 55°C ambient temperature?
Yes — the CMN/A and CMN/PV are manufacturer-rated for continuous operation in ambient temperatures up to 55°C (131°F). Maximum unit operating temperature is stated at ≤ 92°C (198°F). This makes both series relevant for hot production environments, poorly ventilated equipment rooms, and warm-climate installations. Adequate ventilation is still required — the installation space must be able to remove the heat the machine rejects, and cooling air must be able to reach the compressor’s intake without recirculating the hot exhaust air.
Do I need a dryer and filters after an oil-injected compressor?
For most industrial applications: yes. The aftercooler built into the compressor package reduces air temperature and allows some condensate to drop out, but it does not deliver dried or filtered air adequate for most processes. A refrigerated dryer is standard for general manufacturing use. Coalescing filters remove residual oil aerosols. For sensitive processes — instrumentation, spray painting, laser assist, food-adjacent lines — additional treatment (desiccant dryer, activated carbon filter, sterile filter) is typically required. The specific configuration depends on the ISO 8573-1 class your process demands.
Can you supply compressors configured for 60 Hz / US and Canadian voltage?
For most industrial applications: yes. The aftercooler built into the compressor package reduces air temperature and allows some condensate to drop out, but it does not deliver dried or filtered air adequate for most processes. A refrigerated dryer is standard for general manufacturing use. Coalescing filters remove residual oil aerosols. For sensitive processes — instrumentation, spray painting, laser assist, food-adjacent lines — additional treatment (desiccant dryer, activated carbon filter, sterile filter) is typically required. The specific configuration depends on the ISO 8573-1 class your process demands.
What information do I need to provide to get a compressor recommendation?
The minimum information needed is: required airflow (CFM or m³/min), required working pressure (PSI or bar), available electrical supply (voltage / phase / frequency), and a brief description of the application. For a more accurate recommendation, also include: demand pattern (continuous or variable), operating hours per day, maximum ambient temperature, site altitude, and any air quality requirements. The more complete the operating conditions provided, the more precise the recommendation.
Before Requesting a Compressor Quote
Gathering this information before contacting us allows for a faster, more accurate model recommendation.
Required airflow — CFM or m³/min at working pressure
Required working pressure — PSI or bar
Demand pattern — continuous / variable / cyclic
Operating hours per day and days per week
Available voltage — 208 / 230 / 460 / 575 V or other
Phase and frequency — 3-phase / 50 Hz or 60 Hz
Maximum ambient temperature at installation site (°F or °C)
Altitude above sea level (if above 1,000 ft / 300 m)
Indoor or outdoor installation; ventilation available?
Required air quality — ISO 8573 class or process description
Existing air receiver size (if any)
Existing dryers, filters, or treatment (if any)
Available floor space — dimensions or restriction
Application — what does the compressed air power?