Welch Rietschle Thomas

The Self-Cleaning Dry Vacuum System is ideal to use with rotary evaporators for stripping low-boiling-point solvents such as pentane, alcohol or methylene chloride, or for concentrators. The system's two-stage, flexible diaphragm pump resists chemical vapors thanks to fluorinated plastics used on all wetted surfaces, including the diaphragm itself. The pump operates without oil, delivering a vacuum to 9 Torr (12 mbar) with a free air displacement of 34L/min. (1.2 CFM). In addition, the self-cleaning purge automatically runs for two minutes at shutdown to rid pump of residue, ensuring a longer service life and reducing downtime. Call 847/676.8800.