Back1-Cylinder Laboratory Diaphragm Pump PB 18


The oil-free and dry compressing laboratory diaphragm pumps from the PB-18 product line can be used for evacuating, conveying and compressing gases and vapours up to a final vacuum of 85 mbar. Three different ranges with further unique models are available within the product line. (Curve presentation of the standard models, per model range).

The  PB-18 product line is equipped with a single-cylinder diaphragm pump with con-rod drive, which carries out an oscillating, tumbling and rocking, upwards and downwards movement of the diaphragm. The diaphragm is fastened to a rigid con-rod and is subjected to a greater or lesser degree of flexing and stretching, depending on the length of the con-rod. The well-thought-out design of the drive offers the user a compact construction and low spatial requirements.

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 85 mbar
  • Compact construction and low spatial requirements
  • Maintenance-free operating time with long service life

Large pb 18 1 web

Large membran pleuel

Large pb 18 zeichnung

Free flow8.4 l/min23.5 l/min33 l/min
Final vacuum150 mbar95 mbar85 mbar
Final pressure (abs.)4 bar3 bar2 bar
Pump heads1
Hose coupling, suction / pressureG 1/4"
Motor power / r.p.m.0.18 kW / 1400 min-1
Mains requirement / Frequencies230 V - 50 Hz
Noise level57 dBA bis 59 dBA
Permissible gas admission temp.+ 5 C° bis + 45 C°
Permissible ambient temperature+ 5 C° bis + 45 C°
Umgebungs-Temperatur für den Motor+ 5 C° bis + 45 C°
Umgebungs-Temperatur für den Pumpenkopf+ 5 C° bis + 45 C°
Dimensions L x W x H251 mm x 178 mm x 218 mm
Weight4 kg
Impermeable to gas1 x 10-3

Vakuum Flow [l/min] Druck [mbar] 0 100 200 300 400 500 600 700 800 900 0 5 10 15 20 25 30 35 LAB-11 LAB-21 LAB-31

Data sheet