G-Series Side Channel Blowers in Vacuum Operation
Vacuum pumps G-BH1 00
Volume flow
21 to 35 m³/hr
12.4 to 20.6 cfm
With a height and width of approx. 125 mm and a depth of approx. 60 mm, the G-BH1 00 blowers have the size of a
CD and are the smallest gas ring vacuum compressors available on the market. Furthermore, the adjustable volume
flow of the machines ensures that only the exact performance required is actually being supplied - not more.
These blowers are employed primarily in fine mechanical and medical technology applications. With their robust
and built-to-last design, they are also used in other industries such as mechanical engineering.
The G-BH1 00 is driven via an electronically commuted DC motor. This guarantees a high level of efficiency and
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.
30 years ...
Elmo Rietschle official distributor
Side Channel Compressors
Σουλίου 1 & Λεωφόρος Πηγής
15127 Μελίσσια - Αττική
T: 210 6130366, 210 6135866
F: 210 6139787
E: info@cromemco.gr
Copyright 2025, Cromemco Hellas
Vacuum pumps G-BH1
With their high inlet volume flow (up to 2,450 m³/h) and a differential pressure of up to -480 mbar), our low noise
G-BH1 all-rounder have earned their reputation and convinced thousands of customers all over the world. They
are reliable, low-maintenance and durable and are the first choice for many applications in mechanical
engineering.
When used with a frequency converter the performance of the G-BH1 pumps and compressors can be increased
considerably. The G-BH1 machines are UL/CSA approved and can be used without further testing all over the
world. Motors comply with DIN EN 60034 and have IP 55 protection. Available at short notice or ex stock and also
as ATEX certified models, it is a classic that has proven its innovative quality. Needless to say, only those materials
are used which comply with the requirements of the RoHS.
Volume flow
50 to 2540 m³/hr
129.4 to 1441.2 cfm
Vacuum pumps G-BH2
Volume flow
330 to 850 m³/hr
194.1 to 500.0 cfm
Series G-BH2 machines are equipped as standard with highly efficient drive motors (efficiency class 1 -
eff1), which also feature multi-frequency and wide voltage range coils permitting use throughout the
world on wide ranging mains power supplies and the operation of frequency converters up to 100 Hz
(6000 rpm).
By using the VELOCIS, you will protect the environment and save money. Needless to say, only those
materials are used which comply with the requirements of the RoHS.
Vacuum pumps G-BH7
Volume flow
50 to 230 m³/hr
29.4 to 135.3 cfm
Our revolutionary G-BH7 side channel blowers can create pressure differences of up to 1,000
mbar - more than any other gas ring compressor! So far, the systems used to reach these
differential pressure ranges were much louder and larger - or subject to wear. Now the
advantages of wear-free operation coupled with a low noise level can also be used in the most
demanding applications. The G-BH7 vacuum pumps and compressors can work up to 20,000
hours without maintenance down time. These specialist machines have proven their reliability
under the harshest of conditions. Their noise level was already impressively low, but our
engineers and designers were able to make them even more quiet.
The use of a frequency converter mounted directly to the motor or installed separately in a
switchgear cabinet can considerably increase compressor capacity without an increase in size.
Speeds of up to 6000 rpm (100 Hz) can be achieved with standard machines. Needless to say, only
those materials are used which comply with the requirements of the RoHS. Furthermore, these
machines can be supplied without delay and are also available in ATEX certified form.
Compressors G-BH8
Volume flow up to 950 m3/hr, 560 cfm
Differential pressure up to 680 mbar
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).
Energy-saving operation with Variable speed drive.
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.
UL/CSA approval for worldwide use.
20,000 operating hours. Pulsation-free. Virtually maintenance-free.
