Fluid-injected rotary screw compressors with dual compressors: the HSD series

More volume flow on less space

For our HSD series, we integrated two compressors in a single enclosure. Both units are fully equipped with 1:1 direct drive, SIGMA CONTROL controller and cooling system. This series offers these technical data:

  • Pressure: 8.5, 12 or 15 bar
  • Flow rate: 10.1 – 89 m³/min

You can order HSD systems with or without speed-controlled drive. Due to the high flow rates, they are very well suited for demand-intensive applications in the automotive sector or steel industry.

Your advantages

  • Versatility with minimal space requirements:
    Two small compressors in a single enclosure save much space when compared to a single compressor unit with corresponding output capacity. This system optimally adapts to different demand situations, minimising idle times and increasing efficiency.
  • Double dependability:
    Each compressor unit can be operated completely independently. In the event of a unit failure, you still have 50 % of your flow rate.
  • Exceptional efficiency:
    Furthermore, we already use IE4 motors in HSD models and therefore provide you with even further energy savings.

New compressor models with even higher efficiency
Life-cycle costs

Advantages of HSD compressors include:

  • Further enhanced flow-optimised SIGMA profile rotors
  • Minimised internal pressure losses

Your advantage: up to 6.5 % less specific power requirement

 

Our rotary screw compressors with dual compressor units in detail

Equipment

Complete unit

  • Ready for operation
  • Fully automatic
  • Super sound-proofed
  • Vibration-damped
  • All panels powder-coated
  • For ambient temperatures up to +45 °C
  • Service-friendly design: Motor bearing lubrication from the outside

Airend

  • Single stage with cooling fluid injection for optimal rotor cooling
  • Genuine KAESER rotary screw airend with energy-saving SIGMA profile
  • 1:1 Direct drive

Cooling fluid and air circuit

  • Dry air intake filter with pre-filtration
  • Inlet silencer
  • Inlet and vent valves, pneumatic
  • Cooling fluid separator tank with three-stage separator system
  • Pressure relief valve
  • Minimum pressure check valve
  • Thermostatic valve and eco fluid filter in coolant circuit
  • Fluid and compressed air cooler, water-cooled
  • Kaeser centrifugal separator with electronically-controlled condensate drain for energy savings without pressure loss
  • Piping and centrifugal separator made from stainless steel
  • Package water-cooled as standard: Fluid and compressed air aftercooler implemented as plate or optionally available tube-type heat exchanger.

Heat recovery (Option)

  • Optionally available with integrated fluid/water plate-type heat exchanger and additional fluid thermostatic valve
  • External connections

Cooling

  • Water-cooling as standard
  • Soldered plate heat exchanger
  • Machine interior ventilation via two independently controllable fans

Electrical components

Super premium efficiency drive motor IE4 logo

  • Premium Efficiency IE4 drive motor with three Pt100 winding temperature transducers for engine monitoring
  • Control cabinet to IP 54
  • Switching cabinet ventilation
  • Automatic star-delta starter
  • Overload relays
  • Control transformer

SIGMA CONTROL 2

SIGMA CONTROL 2 compressor controller

  • Interfaces for data communication comprising RS 232 for a modem, RS 485 for a slave compressor in base load sequencing mode
  • Profibus DP interface for data networks
  • Ergonomic control panel: Red, yellow and green LEDs show the operational state of the machine at a glance
  • Four-line plain text display
  • 30 selectable languages
  • Touch keys with icons
  • Duty cycle indicator
  • Fully automatic monitoring and regulation of airend discharge temperature; monitoring of motor current, direction of airend rotation, air filter, fluid filter and fluid separator cartridge
  • Display of performance data
  • Service intervals of primary components
  • Maintenance interval counter
  • Display of status data
  • Event memory

Function diagram
Component layout of HSD compressed air stations
  1. Air filter
  2. Inlet valve
  3. Electric motor
  4. Rotary screw airend
  5. Separator with cartridge
  1. Fluid filter
  2. Fluid cooler
  3. Aftercooler
  4. Centrifugal separator
  5. ECO DRAIN condensate drain
Technical specifications

Standard version

ModelHSD 662 HSD 722 HSD 782
Working pressure bar 7.5 10 13 7.5 10 13 7.5 10 13
Flow rate Complete system at working pressure m³/min 66.4 54.44 43.72 72.4 59.48 47.87 78.4 65.31 53.07
Max. positive pressure bar 8.5 12 15 8.5 12 15 8.5 12 15
Nominal motor output kW 360 400 450
Dimensions W x D x H mm 3,570 x 2,145 x 2,350 3,570 x 2,145 x 2,350 3,570 x 2,145 x 2,350
Compressed air connectionDN150 PN16 DIN DN150 PN16 DIN DN150 PN16 DIN
Sound pressure level dB(A) 71 72 72
Weight kg 8,100 7,481 7,027 8,500 8,202 7,262 8,600 8,434 7,815

ModelHSD 842
Working pressure bar 7.5 10 13
Flow rate Complete system at working pressure m³/min 84.4 71.15 58.27
Max. positive pressure bar 8.5 12 15
Nominal motor output kW 500
Dimensions W x D x H mm 3,570 x 2,145 x 2,350
Compressed air connectionDN150 PN16 DIN
Sound pressure level dB(A) 73
Weight kg 8,700 8,666 8,368

SFC version

ModelHSD 662 SFC HSD 782 SFC HSD 842 SFC
Working pressure bar 7.5 10 7.5 10 13 7.5 10 13
Flow rate Complete system at working pressure m³/min 10.4 - 66.32 8.5 - 57.47 11.9 - 77.83 10 - 65.47 8 - 55.78 11.9 - 87.33 10 - 74.41 8 - 63.44
Max. positive pressure bar 8.5 12 8.5 12 15 8.5 12 15
Nominal motor output kW 382 410 515
Dimensions W x D x H mm 4,370 x 2,145 x 2,350 4,370 x 2,145 x 2,350 4,370 x 2,145 x 2,350
Compressed air connectionDN150 PN16 DIN DN150 PN16 DIN DN150 PN16 DIN
Sound pressure level dB(A) 73 74 75
Weight kg 9,100 8,967 9,600 9,113 8,980 10,100 9,934 9,315

Vallourec
A great success!

Compressed air for safety

Kaeser rotary screw compressors ensure reliable and energy-efficient production of giant steel tubes weighing tons at Vallourec.

Reference project: Vallourec