Drehkolben-Vakuumpumpen     ATEX    Kolbenpumpen     Wälzkolbenpumpe     andere Vakuumpumpen         Europe, Middle East and Africa    North and South America     Asia Pacific      Deutschland      LEYBOLD Vakuum GmbH - Bonner Str. 498, 50968 Köln, Germany products: - E 250 Single-Stage Rotary Piston Vacuum Pump Typical Applications: - Chemical, metallurgical and electronic vacuum processes - Impregnating, degassing and drying process-es in experimentation systems, in drying cabinets, extrusion etc. - Pressure range down to 4 x 10 E-2 mbar (2.4 x 10-2 Torr) without gas ballast or to 5 x 10 E-1 mbar (3 x 10 E-1 Torr) with gas ballast - Backing pump for Roots vacuum pumps at intake pressure down to 10 E-3 mbar (0.75 x 10 E-3 Torr) DK 200 Two-Stage Rotary Piston Vacuum Pump Typical Applications - For particularly low ultimate pressures - High vacuum stage with degassed oil from a separate oil reservoir - For all chemical, metallurgical and electronic vacuum processes in the pressure range down to 5 x 10 E-4 mbar (3 x 10 E-4 Torr) without gas ballast and 4 x 10 E-3 mbar (2.4 x 10 E-3 Torr) with gas ballast - Backing pump for Roots vacuum pumps - Use as backing pump in pump systems in connection with diffusion, booster-type diffusion and vapor pumps     Keywords     www.vacuum-guide.com