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The ROTORCAMP EVO®-NK compact units are oil-injected screw compressor modules that integrate the main parts of a compressor system. This solution is the best possible way to build a reliable, compact and cost efficient complete compressor package with ultimate efficiency, low noise and the highest quality standards.
Technical Parameters
Model | Motor Power(min~max) | Max Flow rate | Pressure Range | Weight | |||
kW | HP | m3/min | cfm | bar | psi | kg | |
EVO2-NK | 2.2~11 | 3~15 | 1.6 | 56 | 5~15 | 70~220 | 50 |
1. Compact Oil-Free Design Architecture
"NK" (Non-Kontaminiert) Technology: Specifically engineered for 100% oil-free air compression using permanently lubricated, maintenance-free timing gears
Dry Compression Chambers: Rotors operate without oil injection in compression area, utilizing Teflon®-based polymer rotor coatings for sealing and wear resistance
2. Precision Non-Lubricated Components
Advanced Rotor Configuration: 4+6 asymmetric profile with enlarged rotor tip clearances (0.08-0.12mm) to accommodate thermal expansion during dry operation
Synchronous Gear System: Helical timing gears with ISO 5 precision rating, housed in separate oil-bath chamber with double mechanical seals
High-Temperature Materials: Rotors manufactured from nitrided steel (42CrMo4) with surface hardness >1000 HV; housings from GG25 cast iron with thermal stability up to 200°C
3. Thermal Management System
Integrated Air Cooling: Optimized fin design on housing exterior for natural convection cooling (up to 15 kW heat dissipation)
Forced Cooling Options: Available with integrated fan-cooled shrouds for high-duty applications
Temperature Monitoring: RTD sensors pre-installed at critical thermal points (discharge flange, bearing housings)
1. Certified Oil-Free Performance
ISO 8573-1 Class 0 Certified: Guaranteed oil content <0.01 mg/m³ at discharge flange (third-party validated)
Zero Product Contamination Risk: Eliminates oil carryover concerns for sensitive processes
Reduced Filtration Costs: No requirement for extensive activated carbon filtration (saving 0.2-0.3 bar pressure drop)
2. Low Maintenance Operation
Sealed Gearbox: Lifetime lubricated timing gear chamber with 40,000-hour service interval
Non-Contact Rotors: No rotor wear requiring clearance adjustments; designed for 60,000+ hours before potential recoating
Minimal Routine Requirements: Basic inspections limited to coupling alignment and temperature monitoring
3. Energy Efficiency in Oil-Free Class
Specific Power Consumption: 5.8-6.2 kW/m³/min (at 7 bar) - 12-15% improvement over traditional dry screw designs
Reduced Parasitic Losses: Optimized inlet port design minimizes throttling losses (pressure drop <0.15 bar)
Excellent Part-Load Performance: Maintains efficiency down to 40% load through optimized volume ratio (Vi=3.8 for 7 bar applications)
4. Operational Reliability
Lower Discharge Temperatures: 140-160°C max (vs 180-220°C for competing designs) prolonging coating life
Vibration Performance: <2.8 mm/s RMS vibration velocity across entire operating range
Quick Start Capability: No oil system preheating required; reaches full pressure in <60 seconds from cold start
1. Food & Beverage Processing
Primary Applications: Bottling/canning lines (direct product contact air), fermentation tank agitation, powder conveying (dairy, flour, spices)
Typical Configuration: Paired with desiccant dryers and sterile filters for aseptic processing lines
Regulatory Compliance: Meets FDA 21 CFR and EHEDG hygiene standards; compatible with CIP/SIP protocols
2. Pharmaceutical & Biotechnology
Critical Uses: Tablet coating machines, fluid bed dryers, cleanroom HVAC pressurization, bioreactor sparging
Validation Support: Provides documentation packages for FDA/EU GMP validation (DQ/IQ/OQ protocols available)
Air Quality: Consistently delivers ISO 8573-1 Class 1:1:1 (particles:water:oil) at point of generation
3. Electronics Manufacturing
Semiconductor Production: Photolithography chamber purging, wafer drying, cleanroom tool actuation
PCB Fabrication: Solder mask application, optical inspection systems
Special Requirements: Available in ultra-clean configurations with electropolished stainless steel internals
4. Healthcare & Laboratories
Medical Air Systems: Hospital pipeline air (complying with ISO 7396-1), dental chair operations
Laboratory Instrumentation: GC/MS carrier gas, fermentation systems, glove box pressurization
Safety Features: Optional duplex systems with automatic changeover for critical applications
5. Specialty Chemicals
Process Applications: Polyurethane foam blowing, additive manufacturing (3D printing powder handling), catalyst carrier systems
Material Compatibility: Suitable for compressing oxygen-enriched atmospheres (up to 40% O₂ with special cleaning)
The ROTORCAMP EVO®-NK compact units are oil-injected screw compressor modules that integrate the main parts of a compressor system. This solution is the best possible way to build a reliable, compact and cost efficient complete compressor package with ultimate efficiency, low noise and the highest quality standards.
Technical Parameters
Model | Motor Power(min~max) | Max Flow rate | Pressure Range | Weight | |||
kW | HP | m3/min | cfm | bar | psi | kg | |
EVO2-NK | 2.2~11 | 3~15 | 1.6 | 56 | 5~15 | 70~220 | 50 |
1. Compact Oil-Free Design Architecture
"NK" (Non-Kontaminiert) Technology: Specifically engineered for 100% oil-free air compression using permanently lubricated, maintenance-free timing gears
Dry Compression Chambers: Rotors operate without oil injection in compression area, utilizing Teflon®-based polymer rotor coatings for sealing and wear resistance
2. Precision Non-Lubricated Components
Advanced Rotor Configuration: 4+6 asymmetric profile with enlarged rotor tip clearances (0.08-0.12mm) to accommodate thermal expansion during dry operation
Synchronous Gear System: Helical timing gears with ISO 5 precision rating, housed in separate oil-bath chamber with double mechanical seals
High-Temperature Materials: Rotors manufactured from nitrided steel (42CrMo4) with surface hardness >1000 HV; housings from GG25 cast iron with thermal stability up to 200°C
3. Thermal Management System
Integrated Air Cooling: Optimized fin design on housing exterior for natural convection cooling (up to 15 kW heat dissipation)
Forced Cooling Options: Available with integrated fan-cooled shrouds for high-duty applications
Temperature Monitoring: RTD sensors pre-installed at critical thermal points (discharge flange, bearing housings)
1. Certified Oil-Free Performance
ISO 8573-1 Class 0 Certified: Guaranteed oil content <0.01 mg/m³ at discharge flange (third-party validated)
Zero Product Contamination Risk: Eliminates oil carryover concerns for sensitive processes
Reduced Filtration Costs: No requirement for extensive activated carbon filtration (saving 0.2-0.3 bar pressure drop)
2. Low Maintenance Operation
Sealed Gearbox: Lifetime lubricated timing gear chamber with 40,000-hour service interval
Non-Contact Rotors: No rotor wear requiring clearance adjustments; designed for 60,000+ hours before potential recoating
Minimal Routine Requirements: Basic inspections limited to coupling alignment and temperature monitoring
3. Energy Efficiency in Oil-Free Class
Specific Power Consumption: 5.8-6.2 kW/m³/min (at 7 bar) - 12-15% improvement over traditional dry screw designs
Reduced Parasitic Losses: Optimized inlet port design minimizes throttling losses (pressure drop <0.15 bar)
Excellent Part-Load Performance: Maintains efficiency down to 40% load through optimized volume ratio (Vi=3.8 for 7 bar applications)
4. Operational Reliability
Lower Discharge Temperatures: 140-160°C max (vs 180-220°C for competing designs) prolonging coating life
Vibration Performance: <2.8 mm/s RMS vibration velocity across entire operating range
Quick Start Capability: No oil system preheating required; reaches full pressure in <60 seconds from cold start
1. Food & Beverage Processing
Primary Applications: Bottling/canning lines (direct product contact air), fermentation tank agitation, powder conveying (dairy, flour, spices)
Typical Configuration: Paired with desiccant dryers and sterile filters for aseptic processing lines
Regulatory Compliance: Meets FDA 21 CFR and EHEDG hygiene standards; compatible with CIP/SIP protocols
2. Pharmaceutical & Biotechnology
Critical Uses: Tablet coating machines, fluid bed dryers, cleanroom HVAC pressurization, bioreactor sparging
Validation Support: Provides documentation packages for FDA/EU GMP validation (DQ/IQ/OQ protocols available)
Air Quality: Consistently delivers ISO 8573-1 Class 1:1:1 (particles:water:oil) at point of generation
3. Electronics Manufacturing
Semiconductor Production: Photolithography chamber purging, wafer drying, cleanroom tool actuation
PCB Fabrication: Solder mask application, optical inspection systems
Special Requirements: Available in ultra-clean configurations with electropolished stainless steel internals
4. Healthcare & Laboratories
Medical Air Systems: Hospital pipeline air (complying with ISO 7396-1), dental chair operations
Laboratory Instrumentation: GC/MS carrier gas, fermentation systems, glove box pressurization
Safety Features: Optional duplex systems with automatic changeover for critical applications
5. Specialty Chemicals
Process Applications: Polyurethane foam blowing, additive manufacturing (3D printing powder handling), catalyst carrier systems
Material Compatibility: Suitable for compressing oxygen-enriched atmospheres (up to 40% O₂ with special cleaning)
