Centrifugal compressor DK-GF300-3.6

airDCstationary

Overview
The DK-GF300-3.6 is a high-power conventional two-stage air compressor designed for fuel cell air supply. It delivers a flow range of 20–340 g/s, is driven by up to a 60 kW motor and provides a maximum compression ratio of 3.9, enabling integration with 150–240 kW fuel cell systems without an energy-recovery turbine. The unit features oil-free air bearings, IP67 protection and long start-stop cycle life for vehicle and stationary applications.

Main parameters

• Flow range: 20–340 g/s
• Motor power (max): 60 kW
• Maximum compression ratio: 3.9
• Voltage: 450–750 VDC
• Speed range: 30,000–90,000 rpm
• Protection level: IP67

Technical Data (table)
Spindle model: DK-GF300-3.6
Structural form: Two-stage supercharging
Flow range (g/s): 20-340
Speed range (rpm): 30000-90000
Voltage (VDC): 450-750
Air compressor weight (kg): 21.5
Temperature of the intake air (°C): -30-45
Type of Bearing: Air suspension bearing (oil-free)
Maximum compression ratio: 3.9
Max. motor power (kW): 60
Start-stop life (times): 300000
Controller weight (kg): 8.0
Protection level: IP67

Applications
Designed to supply air for fuel cell systems rated 150–240 kW without an energy-recovery turbine. Suitable for integration in vehicle propulsion and stationary power units where oil-free bearings, IP67 ingress protection, compact weight (compressor + controller) and high start-stop durability are required.

Features / technical specifications

• Model: DK-GF300-3.6
• Architecture: Two-stage supercharging
• Flow range: 20–340 g/s for broad operating window
• Speed range: 30,000–90,000 rpm for precise air control
• Operating voltage: 450–750 VDC
• Max. motor power: 60 kW
• Max. compression ratio: 3.9
• Bearing type: Air suspension (oil-free) bearings
• Compressor weight: 21.5 kg; Controller weight: 8.0 kg
• Intake air temperature: -30 to 45 °C
• Start-stop durability: 300,000 cycles
• Ingress protection: IP67