Energy-Saving Class 0 Oil-Free Water-Lubricated Rotary Screw Air Compressor- 40 bar for PET Stretch Blow Molding

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  • Working Pressure:25~40[ bar ]363~580[ psig ]
  • Free Air Delivery:706[ cfm ]20[ m3/min ]
  • Working Power:200~250[ kw ]267~350[ hp ]

Product Details

RWH-250W (3).jpg

Product features

  • 100% Oil-Free – Class 0 – Water-based lubrication eliminates oil contamination, critical for food, beverage, and pharmaceutical packaging.

  • ≥30% Energy Saving – Zero clearance volume, water cooling, and VSD cut energy use by at least 30% vs traditional units (15% vs dry oil-free).

  • Low Temp (<50°C) – Water absorbs heat, reducing thermal stress and extending service life to >50,000 hours.

  • Ultra-Quiet & Smooth – Rotary screw design eliminates vibration and pulsation; noise 75–80 dB, safe and comfortable for operators.

  • Low Maintenance (<$500/year) – No oil filters or separators; only air/water filter elements need replacement, slashing TCO.

  • Eco-Friendly – Zero oil waste, food-grade stainless steel construction, fully compliant with environmental standards.


Technical Parameters

ModelRWH-250W
Volume flow20.0 m³/min
Work pressure4.0 MPa
Motor power90 + 160 kW
Motor protection gradeIP55
Insulation classF class
Power380/3/50 (V/PH/HZ)
Start wayVariable frequency soft start
Transmission wayDirect connection
Exhaust temperatureCooling water inlet temperature +15℃
Noise≤82 dB(A)
Cooling wayWater cooling
Cooling water volume52 T/H
Cooling water diameterDN 80
Over caliber (connection size)DN 65
Dimension (L×W×H)3600 × 2050 × 2250 mm
Weight4200 kg