BackPB 42 2-cylinder, linear-diaphragm pump with magnetic-coupled drive PB 42

The PB-42 range of oil-free and dry-sealed linear-diaphragm pumps with magnetic-coupled drives, provide lossless evacuation and sealing of rare and thus cost-intensive gases and vapours, such as  Helium-3 for example. Six different models are available in the production range.

The PB-42 product range is equipped with a two-cylinder diaphragm pump. Hermetic sealing is now possible thanks to the new magnetically coupled drive developed and employed for the first time by hyco Vakuumtechnik. The pump runs more quietly.

There are no losses in the event of a pump diaphragm rupture as there is no gases or vapour escape thanks to the design principle. Contactless conveyance is guaranteed as a mechanical transfer through the displacement of the pump has been completely dispensed with and there is also additional sealing from the motor.


Statement from Dr. Peters, Garching research centre:

"At the Heinz Maier Leibnitz research neutron source (FRM II) we  create extremely low temperatures in the range of millikelvin by means of the so-called Joule-Thomson expansion of the rare and expensive gas isotope Helium 3.

In the past, the compression of the gas required for this process led to ruptures of the compressor diaphragm resulting in intolerable losses of the expensive gas as it was able to escape through the crankcase.

In cooperation with Hyco it was possible to construct almost leak-free gas-carrying components through the use of magnetically coupled compressors. In the event of a diaphragm rupture, the gas is not lost and can be fed back into the circuit.

We are delighted to have found an innovative and reliable partner in Hyco, who were willing to implement our requirements in a competent and timely manner."


Large membrankupplungspumpe pb42 web

Large 2ml opt

Large pb 42 zeichnung2 neu web


SeriesML65.22ML65.23ML75.22ML75.23ML86.23ML86.22
Free flow17 l/min8.5 l/min42 l/min21.5 l/min33 l/min65 l/min
Final vacuum150 mbar35 mbar85 mbar15 mbar7 mbar80 mbar
Final pressure with KG-Gears3 bar2 bar1 bar
Pump heads2
Hose coupling, suction / pressureG 1/4 ''
Motor power / r.p.m.0.37 kW / 1400 min-1
Mains requirement / Frequencies230 V - 50 Hz o. 230/400 V - 50 Hz
EX Motorto request
Noise level49 dBA bis 53 dBA
Permissible gas admission temp.+ 5 C° bis + 45 C°
Permissible ambient temperature+ 5 C° bis + 45 C°
Dimensions L x W x H406.5 mm x 175 mm x 210 mm
Weight15 kg
Impermeable to gas1 x bis1x10-5mbarxl/s

Vakuum / vacuum Flow [l/min] Druck / pressure [mbar abs.] 0 100 200 300 400 500 600 700 800 900 0 10 20 30 40 50 60 70 ML65.22 ML65.23 ML75.22 ML75.23 ML86.23 ML86.22

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Data sheet