The oil-free and dry compressing diaphragm pumps from the PB-9 product line can be used for evacuating, conveying and compressing gases and vapours up to a final vacuum of 2 mbar. Six different ranges with further unique models are available within the product line. (Curve presentation of the standard models, per model range).

The PB-9 product line is equipped with a eight-cylinder diaphragm pump with linear drive. The staggering or flexing of the diaphragms is prevented here with precisely-straight upwards and downwards movement between the top dead centre and bottom dead centre. This ensures a long service life for the diaphragm. When compared to con-rod pumps with the same performance, diaphragm pumps are a more compact construction due to the omission of the long and rigid con-rods.

The range is further distinguished by quiet operation with proven long service life and maintenance-free operating time.

The materials used, such as aluminium for the gas-conducting components, stainless steel for the valves and piping and VITON (FKM) for the diaphragms, open up a wide range of application options with non-aggressive gases.


  • Excellent final vacuum up to 2 mbar
  • Compact construction and low spatial requirements
  • Maintenance-free operating time with long service life

Free flow155 l/min97 l/min77.5 l/min220 l/min138 l/min114 l/min
Final vacuum90 mbar12 mbar2 mbar75 mbar9 mbar3 mbar
Final pressure (abs.)3 bar2 bar
Final pressure with KG-Gears3 bar2 bar
Pump heads8
Hose coupling, suction / pressureG1/4" / G1/2"
Motor power / r.p.m.0.45 – 0.9 kW / 1400 min-1
Mains requirement / Frequencies230/400 V - 50 Hz
Noise level58 dBA bis 60 dBA
Permissible gas admission temp.+ 5 C° bis + 45 C°
Permissible ambient temperature+ 5 C° bis + 45 C°
Permissible ambient temperature motor+ 5 C° bis + 45 C°
Permissible ambient temperature pump+ 5 C° bis + 45 C°
Dimensions L x W x H616 mm x 253 mm x 265 mm
Weight24.5 kg
Impermeable to gas1 x 10-3

vacuum flow [l/min] pressure [mbar] 0 100 200 300 400 500 600 700 800 900 0 50 100 150 200 250 ML75.85-H6-PR-D14 ML75.86-H6-D14 ML75.88-H6-D14 ML86.85-ZV-PR ML86.86-H8-ZV-PR ML86.88-H8-D14

User manual Data sheet