BAUER JUNIOR II-W Breathing Air Compressor 2.2 kW 230V

BAUER Breathing Air Compressor JUNIOR II-W (2.2 kW / 230V Single-Phase)

Engineered by BAUER Kompressoren, the JUNIOR II-W is the industry-standard portable high-pressure compressor designed to generate certified breathing air compliant with DIN EN 12021 and CGA Grade E. Powered by a robust single-phase 2.2 kW (3.0 HP) electric motor running at 230 V / 50 Hz, this unit yields a free air delivery (FAD) charging rate of 100 L/min (3.5 CFM).

Featuring BAUER’s proven 3-stage, 3-cylinder reciprocating compressor block with integrated intercoolers, oil/water intermediate separators, and the proprietary P21 TRIPLEX® purification system, the JUNIOR II-W reliably delivers clean, dry breathing air at working pressures up to 225 bar (PN 200) or 330 bar (PN 300). Its compact, vibration-damped steel chassis makes it ideal for offshore support vessels, emergency shipboard SCBA safety lockers, professional diving expeditions, and fire service rapid-response teams.

Model Details

• Manufacturer: BAUER
• Series: JUNIOR II Portable Series
• Model Identifier: JUNIOR II-W (Alternating Current / Single-Phase)
• Manufacturer Part Numbers (MPN):
  • JRII-W-225 (225 bar / PN200 configuration with standard DIN 477 G 5/8″ connector)
  • JRII-W-330 (330 bar / PN300 configuration with standard DIN 477 G 5/8″ connector)
  • 100117 / JRII-W-230V-50HZ (Base electric unit assembly)
• Compressor Block: BAUER Block Type Junior II (3 cylinders, 3 stages, splash-lubricated)

Key Features

1. Three-Stage Compression Geometry: Utilizes a heavy-duty, low-wear 3-cylinder configuration with finned aluminum and stainless steel intercoolers to maintain discharge air within 10–15°C above ambient.
2. Single-Phase Convenience (230 V / 50 Hz): Factory-fitted with an industrial capacitor-start AC motor drawing 13.2 A rated current, enabling direct connection to standard utility or shipboard auxiliary circuits without requiring 3-phase switchgear.
3. Comprehensive Multi-Stage Overpressure Protection: Dedicated intermediate pressure relief valves behind the 1st and 2nd stages, plus a TÜV-inspected and sealed final-stage safety valve (225 bar or 330 bar).
4. Rugged, Corrosion-Resistant Frame: Compact, powder-coated steel tubular chassis equipped with carrying handles, anti-vibration damping feet, and an OSHA-compliant high-density composite V-belt protective guard.

Technical Details:

Compatibility

• Breathing Apparatus Cylinders: Compatible with all standard steel, aluminum, and carbon-composite SCBA (Self-Contained Breathing Apparatus) and SCUBA cylinders fitted with DIN 477 (G 5/8″ thread) or international INT/Yoke valves (with adapter part 083230).
• Dual Pressure Switch-Over Device: Accepts retrofit of the BAUER manual change-over valve allowing seamless toggle between 200 bar and 300 bar bottle charging.
• Purification Monitoring: Fully compatible with the BAUER B-TIMER digital run-time and filter saturation computer.
• Filtration Modules: Direct fitment for P21 filtration chambers; accepts optional B-VIRUS FREE catalytic filter housings and B-AEROGUARD CO2 reduction scrubbers.

Part Number Cross-Reference

• Intake Micronic Air Filter Cartridge: N4823 / 04852-410
• Standard P21 TRIPLEX Filter Cartridge (Moisture/Oil): 059183 / N25886
• P21 CO-Removal Cartridge (Hopcalite): 057674
• Synthetic Lubricating Oil (1 Liter): N19745 / N28355
• Mineral Compressor Oil (1 Liter): N22138
• Final Pressure Safety Valve (225 bar): 077705
• Final Pressure Safety Valve (330 bar): 077706
• Drive V-Belt (50 Hz configuration): N2724

Frequently Asked Questions

How often do I need to change the BAUER P21 filter cartridge on the Junior II-W?

The BAUER P21 filter cartridge has a maximum processing capacity of 130 m³ of compressed air at 20°C. Under continuous warm conditions (30°C+ ambient), the molecular sieve saturates faster. As a mandatory safety standard, replace the cartridge every 50 operating hours, once the B-TIMER indicator signals saturation, or at least every 12 months—whichever comes first.

Can I run the BAUER Junior II-W on a standard household or small marine generator?

Yes, provided the electrical circuit can handle the load. The motor is rated at 2.2 kW with a full-load running draw of 13.2 A at 230 V. However, single-phase induction motors demand 3x to 4x their rated current during startup. If running from an auxiliary generator, ensure the generator has a continuous rating of at least 6.0 kVA to absorb the starting inrush without stalling.

What is the difference between the Junior II-W, Junior II-E, and Junior II-B?

The compressor block is identical across all three units. The suffix designates the drive type: -W specifies single-phase AC electric drive (230 V, 50 Hz); -E specifies three-phase electric drive (400 V, 50 Hz); and -B indicates a 4-stroke petrol/gasoline combustion engine (typically Subaru or Honda) for standalone field deployment.

How do I switch the compressor between filling 200 bar and 300 bar cylinders?

Standard units are factory-calibrated for either 225 bar or 330 bar with an overpressure relief safety valve. To switch safely between both pressures, install the optional BAUER manual change-over device with dual filling hoses and individual pressure relief valves, or swap the certified final-stage safety valve to match your cylinder’s working pressure. Never fill a 200 bar cylinder using a 300 bar safety valve setting.