The oil-free and dry compressing laboratory diaphragm pumps from the PB-21 product line can be used for evacuating, conveying and compressing gases and vapours up to a final vacuum of 8 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-21 product line is equipped with a two-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.
|Free flow||33 l/min||17 l/min||8.5 l/min||42 l/min||21.5 l/min||65 l/min|
|Final vacuum||8 mbar||120 mbar||32 mbar||90 mbar||12 mbar||75 mbar|
|Final pressure (abs.)||2 bar||4 bar||3 bar||2 bar|
|Final pressure with KG-Gears||2||4||3||2|
|Hose coupling, suction / pressure||G 1/4"|
|Motor power / r.p.m.||0.16 kW / 1400 min-1|
|Mains requirement / Frequencies||230 V - 50 Hz|
|Noise level||49 dBA bis 53 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 H||308 mm x 206 mm x 199 mm|
|Impermeable to gas||1 x 10-3|