Elmo Rietschle
Regenerative Blowers

Some technologies are so good that it is hard to improve them. Regenerative blowers from Elmo Rietschle are such an example and we were the first to patent regenerative blower technology! They have proven their reliability in service for many decades, performing flawlessly day in and day out with virtually no down time.

Our regenerative blowers (often referred to as side channel blowers) are available in a wide selection for performance ranges up to 1,766 cfm at 60 Hz and differential pressures of up to 420 in. H₂O. With flexibility and power, these blowers cover a variety of demanding applications.The G-Series regenerative blowers feature NEMA Premium motors with voltage ranges for 50 and 60 Hz in protection class IP 55 (insulation class F) and are UL 507 and CSA 22.2 No. 113 approved. This makes them the ideal solution for worldwide use.

Elmo Rietschle Regenerative Blowers G-BH2 Flow Graph

Regenerative Blower Operating Principle

How does a regenerative blower work?
The impellers in the G-Series machines are mounted directly on the motor shaft for contact free compression. Maximum operational reliability, even at high differential pressures, is ensured by the arrangement of the bearings outside the compression chamber.Air/gas is taken in through the inlet and enters the side channel. The rotating impeller imparts velocity energy into the air/gas in the direction of rotation. Centrifugal force in the impeller blades accelerates the air/gas outward, increasing pressure.Kinetic energy is imparted with every rotation resulting in further pressure increase. The side channel narrows at the rotor, sweeping air/gas off the impeller blades and discharging it through the outlet silencer where it exits the blower.

Elmo Rietschle Regenerative Blowers G-BH2 Operating Principle

Elmo Rietschle Regenerative Blowers
G-BH100

The regenerative revolution - Volume flow up to 520 cfm and differential pressure up to 420 in. H₂O. With its significantly expanded range of performance and lower noise levels, the regenerative technology can now be used in completely new fields of application that were previously unimaginable. They deliver 40,000 operating hours between service and are virtually maintenance free.

  • Height and width of approx. 125 mm and a depth of approx. 60 mm
  • Smallest side channel blower available on the market.
  • Adjustable volume flow of the machines.
  • Driven via an electronically commuted DC motor.
  • IE regulations do not apply to DC motors.
  • Maintenance-free operation for more than 20,000 operating hours.
  • The operating electronics are a standard feature of the machines which allow infinitely variable control of speed and output of the blower.
  • Volume flow 12.4 to 20.6cfm
  • Differential pressure up to 100mbar (1.5psi)

Please contact CompreVac for application assistance with regenerative blowers and associated equipment.

Elmo Rietschle Regenerative Blowers G-BH7

Elmo Rietschle Regenerative Blowers
G-BH1

  • Virtually no maintenance
  • Available with variable speed drive (VFD)
  • UL/CSA approved
  • Can be used without further testing all over the world
  • Motors comply with DIN EN 60034
  • IP 55 protection class
  • IE3 / Nema premium motors standard on motors >2HP
  • ATEX versions available

Please contact CompreVac for application assistance with regenerative blowers and associated equipment.

Elmo Rietschle Regenerative Blowers G-BH1

Elmo Rietschle Regenerative Blowers
G-BH2 VELOCIS

The regenerative revolution - Volume flow up to 520 cfm and differential pressure up to 420 in. H₂O. With its significantly expanded range of performance and lower noise levels, the regenerative technology can now be used in completely new fields of application that were previously unimaginable. They deliver 40,000 operating hours between service and are virtually maintenance free.

  • Wear-free 2 or 3 stage operation
  • Extremely smooth operation
  • Very low noise level thanks to acoustic engineering
  • Pulsation-free
  • UL/CSA approval
  • IP 55 protection class
  • IE3 / Nema premium motors standard on motors >2HP
  • Variable speed drive available

Please contact CompreVac for application assistance with regenerative blowers and associated equipment.

Elmo Rietschle Regenerative Blowers G-BH2

Elmo Rietschle Regenerative Blowers
G-BH7

The regenerative revolution - Volume flow up to 520 cfm and differential pressure up to 420 in. H₂O. With its significantly expanded range of performance and lower noise levels, the regenerative technology can now be used in completely new fields of application that were previously unimaginable. They deliver 40,000 operating hours between service and are virtually maintenance free.

  • Up to 20,000 hours without maintenance down time
  • The use of a frequency converter mounted directly on the motor or installed separately in a switchgear cabinet can considerably increase compressor capacity without an increase in size
  • Speeds of up to 6,000 rpm (100 Hz) can be achieved with standard machines
  • Pulsation-free
  • UL/CSA approval for worldwide use.
  • IP 55 protection class
  • IE3 / Nema premium motors on request
  • Available with ATEX certification.
  • Volume flow 29.4 to 135.3cfm
  • Differential pressure up to 1,000mbar (14.7psi)

Please contact CompreVac for application assistance with regenerative blowers and associated equipment.

Elmo Rietschle Regenerative Blowers G-BH7

Elmo Rietschle Regenerative Blowers
G-BH8

  • Compact design
    The G-BH is about half as large (installed volume) and nearly 60% lighter than a comparable standard machine with the same performance characteristics.
  • Quiet
    Modern sound engineering: only half as loud (78 db(A) versus 84 db(A))
  • Economical
    Cuts costs for: shipping (low weight), packaging (smaller), electrical installation (smaller cross sections and smaller circuit protection devices), electrical energy (high efficiency and good controllability)
  • Flexible
    These units are normally operated with frequency converters. The housing components can be rotated in 45° increments without manifolds and silencers or in 90° increments with manifolds and silencers. Together, both of these features offer maximum flexibility upon integration in the overall system.
  • Regarding IE3
    200 Hz motors which are used in this side channel blower do not fall under IE regulations.
  • Volume flow up to 950 m3/hr
  • Differential pressure up to 680 mbar
  • UL/CSA approval for worldwide use

Please contact CompreVac for application assistance with regenerative blowers and associated equipment.

Elmo Rietschle Regenerative Blowers G-BH7