Rotary vacuum pumps

Kaeser's rotary vacuum pumps: turnkey solutions for industrial vacuum applications

Our rotary screw vacuum pumps feature a SIGMA profile airend specifically designed for vacuum applications such as hold down for CNC router tables, vacuum forming, thermoforming, packaging, bottle and tube filling, drying, degassing, and filtration.

  • Volume: 166 to 551 acfm
  • Final vacuum: 99%
  • Pressure range: 10-29" HgV

Your advantages

  • Extremely efficient:
    IE4 motors
  • Quiet operation:
    Soundproofing and vibration isolation mounts ensure low noise levels and smooth, quiet operation.
  • Easy installation and service-friendly:
    All units arrive piped and wired, ready for installation. Wide-opening doors and a removable rear panel facilitate easy access to all maintenance components.
High-flow vacuum blowers are another cost-effective solution for many applications.
Lower your operating costs
Life-cycle costs

The V-belt drive system with automatic tensioning powers the airend at precisely the right speed. The motor power is transmitted to the airend as efficiently as possible, saving energy and improving package reliability.


Take a closer look at our rotary vacuum pumps


Vacuum airend

  • Rotary screw vacuum airend with energy-saving SIGMA profile
  • V-belt Drive
  • Automatic belt tensioning
  • Inlet valve controlled by a solenoid valve
  • Cooling oil pump (gear pump)
  • Inlet air temperatures up to +115 °F

Electric motor

Premium efficiency motors used in rotary screw vacuum pumps
  • Premium Efficiency IE4
  • IP 55 (ASV series: IP 54)
  • Class F insulation
  • 230 / 460 V, 3-phase, 60 Hz


  • Air-cooled aluminum fluid cooler
  • Designed for ambient temperatures up to +115 °F

Cooling fluid circuit

  • Thermostatic valve
  • Bypass of full-flow micro-filter with replaceable insert
  • Combined fluid reservoir and separator tank with safety relief valve
  • Multi-stage separator cartridge
  • Fluid level sight glass, drain valve, and hose
  • Quick-release couplings for measuring pressure differential
  • Separator cartridge

Control cabinet

  • IP 54
  • 115V control voltage
  • Direct motor start-up
  • Motor overload protection relay

General design

  • Compact enclosure mounted on a solid base frame equipped with anti-vibration mounts
  • Powder-coated surfaces
  • Mineral wool soundproof lining
  • Access doors on top and side
  • Replaceable cooling air filter
  • Airend and motor on anti-vibration mounts
  • Flexible piping
  • Belt drive and fan with full guard
  • Vacuum filter with pressure transducer to indicate clogging
  • Infinite control of inlet valve opening via partial-load controller
  • Units shipped standard with Dual control. Other control profiles available for selection.
  • Gas ballast unit for enhanced water vapor tolerance


SIGMA CONTROL 2 compressor controller
  • "Traffic-light" LED indicators show operational status at a glance
  • Plain text display
  • 30 selectable languages
  • Soft-touch keys with icons
  • Fully automated monitoring and control
  • Dual, Quadro, Vario and Continuous control profiles included as standard
  • Interfaces: Ethernet connection to Sigma Network
  • Additional optional communications modules for: Profibus DP, Modbus, Profinet and DeviceNet
  • SD-card slot for data-logging and updates
  • RFID reader
  • Web server
Schematic illustration
Component layout of a rotary screw vacuum pump
  1. Vacuum network connection
  2. Intake air filter (vacuum)
  3. Inlet valve (vacuum regulator)
  4. Rotary screw vacuum airend
  5. Belt drive
  6. Drive motor
  7. Gas ballast air filter
  8. Gas ballast silencer
  1. Cooling fluid separator tank
  2. Exhaust air filter insert
  3. Exhaust air outlet connection
  4. Cooling fluid cooler
  5. Cooling fan
  6. Cooling fluid microfilter
  7. Cooling fluid thermostatic valve
  8. Cooling fluid pump
Technical specifications

The technical specifications can be found in this brochure:

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