EP-CMW4.5-1.0 Oil-Free Scroll Air Compressor
The EP-CMW4.5-1.0 delivers 410 L/min of certified oil-free compressed air at up to 1.0 MPa via a 4.5 kW permanent magnet scroll drive — purpose-built for mid-scale food manufacturing, automated test equipment, and multi-room medical facilities needing higher working pressure with the same oil-free reliability as standard-pressure units.
EP-CMW4.5-1.0: Mid-Range 1.0 MPa Oil-Free Scroll Compressor for Industrial and Medical Applications
The EP-CMW4.5-1.0 is the mid-range single-head option in Ever Power's 1.0 MPa scroll compressor line -- a 4.5 kW (6 HP) permanent magnet unit delivering 410 L/min of structurally oil-free air at working pressures from 0.2 to 1.0 MPa. The extra pressure tier compared to the 0.8 MPa range makes this model suited to operations supplying compressed air to equipment with 0.9-1.0 MPa minimum supply requirements or to facilities that want 0.2 MPa of pressure headroom above standard-rated pneumatic systems. At 52 +/- 3 dB(A) and dimensions of 720 x 680 x 1050 mm (150 kg), it maintains the same compact profile as its 3.7 kW counterpart while delivering higher working pressure from a 4.5 kW drive. The air-end carries a 2-year warranty. Review the full product range to compare all 1.0 MPa configurations.
The EP-CMW4.5-1.0 is particularly valued in food packaging environments where higher-pressure pneumatic conveyors are specified, in automated test facilities where test rig pneumatics are calibrated at 1.0 MPa, and in multi-room medical or dental facilities supplying several simultaneous users from a single centralised compressor. Its direct-drive architecture, stainless steel air path, and single-use stainless outlet make installation straightforward and long-term operation largely self-managing.
Engineering Foundation
Ever Power's CMW 1.0 MPa range uses the same precision scroll geometry and high-stiffness air-end housing as the 0.8 MPa series, with scroll profile and tip seal specifications optimised for the higher compression ratio required at 1.0 MPa. The 4.5 kW permanent magnet motor delivers the additional drive torque needed to maintain volumetric efficiency at this pressure level while preserving the direct-drive architecture -- no belt, no coupling, no additional maintenance touchpoints. The 2-year air-end warranty applies at full 1.0 MPa working pressure.
Features
410 L/min at 1.0 MPa -- Mid-Range Volume at Higher Pressure
Delivering 410 L/min at full 1.0 MPa working pressure, this model supplies multiple simultaneous users or single high-demand applications without the pressure compromise that arises from running a 0.8 MPa unit with regulators at or near their maximum setting.
4.5 kW Permanent Magnet Motor -- Optimised for 1.0 MPa
The 4.5 kW motor provides the additional torque needed to maintain scroll head efficiency at higher compression ratios while keeping noise at 52 dB(A) and retaining the direct-drive configuration that eliminates belt and coupling maintenance.
52 dB(A) at 1.0 MPa -- Low Noise in Open Production Environments
Achieving 52 dB(A) at 1.0 MPa working pressure requires careful balance between scroll housing stiffness, soundproof enclosure design, and motor speed -- all of which are optimised in the EP-CMW4.5-1.0 to deliver this result without aftermarket acoustic treatment.
Direct Drive -- No Belt Wear, No Coupling Misalignment
The 4.5 kW motor connects directly to the scroll air-end, eliminating the two most common compressor failure modes at this power level: belt fatigue and coupling misalignment. This simplification directly reduces both planned and unplanned maintenance events.
PLC Controller with 1.0 MPa Pressure Management
The intelligent PLC manages start/stop cycling to maintain system pressure within the 1.0 MPa operating band, displaying discharge temperature, pressure, run hours, and maintenance reminders for the higher-pressure operating environment.
Stainless Steel Throughout -- 1 Micron Inlet Filter
Food-grade stainless steel for all air-contact surfaces and a 1 micron inlet filter maintain oil-free air quality throughout the higher-pressure compression cycle and downstream distribution system.
Scroll Compression at 1.0 MPa -- The Technical Basis
At 1.0 MPa working pressure, the scroll compression ratio in the EP-CMW4.5-1.0 is higher than in the 0.8 MPa model. This is achieved through an extended compression path in the scroll profile -- the crescent-shaped pockets travel a longer inward distance before reaching the discharge port, allowing greater volume reduction and a higher final pressure. The tip seals and scroll surface specifications are adapted for this higher pressure differential, maintaining the oil-free sealing integrity throughout the air-end's service life. The 4.5 kW motor provides the additional torque needed to compress air to 1.0 MPa without reducing the scroll's orbital speed -- preserving the 410 L/min volumetric output at full working pressure.
Technical Specifications
| Parameter | Specification |
|---|---|
| Model | EP-CMW4.5-1.0 |
| Motor Power | 4.5 kW / 6 HP |
| Working Pressure Range | 0.2 - 1.0 MPa |
| Free Air Delivery (FAD) | 410 L/min |
| Noise Level | 52 +/- 3 dB(A) |
| Outlet Connection | 1/2 inch stainless steel |
| Weight | 150 kg |
| Dimensions L x W x H | 720 x 680 x 1050 mm |
| Air-End Warranty | 2 Years |
| Motor Type | Permanent Magnet, IP65, F-class, >94% efficiency |
| Drive | Direct Drive -- no belt, no coupling |
| Inlet Filtration | 1 micron |
| Lubrication | Oil-Free (annual bearing grease) |
Industry Applications
| Sector | Application | Key Advantage |
|---|---|---|
| Food Packaging and Processing | Pneumatic conveying at 1.0 MPa, high-pressure filling equipment | Meets higher-pressure pneumatic conveyor specifications oil-free |
| Automated Test Equipment | Pneumatic test rig actuators, calibrated at 0.9-1.0 MPa | Accurate supply pressure for calibrated test system validation |
| Multi-Room Medical and Dental Facilities | Central air supply for four to six simultaneous dental or treatment rooms | Sufficient volume for multi-chair central supply at 1.0 MPa |
| Pharmaceutical Manufacturing | Granulator pneumatics, blister pack actuation, clean room distribution | Higher pressure for process equipment specified above 0.8 MPa |
| Electronics Testing | High-pressure component test fixtures, PCB depanelling, ESD-safe jigs | Oil-free 1.0 MPa air for precision electronics test environments |
Customer Case Studies
Colombia -- Multi-Room Dental Practice
Centralised 1.0 MPa Supply for Eight Treatment Rooms
A dental group in Bogota expanding from four to eight treatment chairs needed a central compressor capable of supplying all rooms simultaneously at 1.0 MPa -- the inlet pressure required by their high-speed handpiece sterilisers and orthodontic bracket bonding tools. Their existing 0.8 MPa unit had insufficient pressure headroom for the new equipment. The EP-CMW4.5-1.0's 410 L/min output handled all eight rooms at normal concurrent usage, and the 52 dB(A) noise level eliminated the acoustic disturbance that their previous higher-noise compressor had caused in patient reception.
★★★★★
"Eight rooms running simultaneously on one quiet unit at the right pressure. No more pressure complaints from the handpiece steriliser alarms." -- Practice Operations Manager
United Kingdom -- Automated Test Equipment Manufacturer
Reliable 1.0 MPa Oil-Free Air for Pneumatic Test Rig Validation
A UK manufacturer of automated test equipment for the aerospace sector required a compressed air source for their calibration and validation rigs that was both genuinely oil-free and precisely stable at 1.0 MPa. Their previous oil-injected unit with downstream filtration had failed two air quality validation tests due to filter bypass events, invalidating their test rig certification. The EP-CMW4.5-1.0 eliminated filtration from the air quality equation entirely, and the stable 410 L/min supply at consistent 1.0 MPa pressure eliminated the pressure drift that had been introducing measurement uncertainty in actuator travel tests.
★★★★★
"Our rig certification is now based on a compressor that is definitively oil-free -- not one that depends on a filter that can bypass. Pressure stability improved our measurement uncertainty figures." -- Test Systems Engineer
Brazil -- Pharmaceutical Solid Dosage Granulation Line
Higher-Pressure Air for Fluid Bed Granulator Process Control
A Brazilian pharmaceutical manufacturer's fluid bed granulator control system was specified with pneumatic actuators requiring 0.95-1.0 MPa supply pressure. Their existing 0.8 MPa compressor was unable to meet this requirement without a booster, adding complexity and cost. The EP-CMW4.5-1.0 supplied the granulator control pneumatics at 1.0 MPa from a single oil-free unit, eliminating the booster requirement. The GMP quality team also noted that the oil-free output simplified their compressed air system validation documentation -- a single air quality class rather than documenting booster output separately.
★★★★★
"Eliminated the booster, simplified GMP validation, and the granulator actuators now get the pressure they were designed for." -- Pharmaceutical Engineer
Frequently Asked Questions -- EP-CMW4.5-1.0
Why does the 1.0 MPa single-head model use a 4.5 kW motor rather than 3.7 kW?
Compressing air to 1.0 MPa requires a higher compression ratio than 0.8 MPa. The extra 0.8 kW of motor capacity provides the additional torque needed to maintain scroll head volumetric output at the higher compression ratio -- preserving the rated 410 L/min at full 1.0 MPa working pressure without reducing scroll orbital speed or compromising efficiency.
Is the 410 L/min output figure measured at rated working pressure?
Yes. All EP-CMW FAD figures are measured at the stated maximum working pressure. The 410 L/min is the actual output available at 1.0 MPa -- not an atmospheric or partial-pressure figure.
Does 1.0 MPa working pressure affect the warranty conditions?
No. The 2-year air-end warranty applies at the full 1.0 MPa working pressure. The scroll profiles, tip seals, and housing specifications are designed and tested for continuous operation across the full 0.2-1.0 MPa working range.
Can this unit serve both 0.8 MPa and 1.0 MPa equipment simultaneously?
Yes. The system pressure is set at the highest required pressure -- typically 1.0 MPa -- and downstream regulators reduce supply to 0.8 MPa or lower for equipment with lower pressure ratings. The EP-CMW4.5-1.0's 0.2-1.0 MPa operating range accommodates mixed-pressure installations without modification.
What oil content class does the 1.0 MPa output meet?
The oil-free scroll compression meets ISO 8573-1 Class 0 for oil content at 1.0 MPa -- the highest available classification. No lubricant enters the compression chamber at any stage of the process at any pressure within the rated working range.
Enquire About the EP-CMW4.5-1.0
Whether you are specifying a new compressed air installation for a higher-pressure process application or replacing an existing system that no longer meets pressure or purity requirements, Ever Power's team is available to provide technical guidance and detailed quotations. Learn more about Ever Power's engineering and manufacturing capabilities or view the complete EP-CMW 1.0 MPa range.
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