Dry Vacuum Pump System works with rotary evaporators.
October 27, 2003 - Self-Cleaning Dry Vacuum System™ features diaphragm pump that resists chemical vapors by using fluorinated plastics on all wetted surfaces. Pump operates without oil, delivering vacuum to 12 mbar with free air displacement of 1.2 cfm. Self-cleaning purge automatically runs for 2 min at shutdown to rid pump of residue. Adjustable bleed valve allows regulation of vacuum level. Glass inlet separator helps prevent pump from ingesting liquids or particulates.
(Archive News Story - Products mentioned in this Archive News Story may or may not be available from the manufacturer.)
Original Press release
Gardner Denver Welch Vacuum Technology, Inc
7300 N. Linder Ave.
Skokie, IL, 60077
USA
Self-Cleaning Dry Vacuum Pump System™
Welch’s 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.
Other added protective features include a glass inlet separator that helps prevent the pump from ingesting liquids or particulates; a gas ballast or vent switch to minimize condensation when pumping heavy vapor loads; and an exhaust separator that collects any liquid droplets or particulates flushed from the pump during the purge cycle.
In addition, adjustable bleed valve mounted directly on the system lets you regulate the vacuum level, while a dial pressure gauge permits monitoring of set value --- a feature especially useful when pumping low-boiling solvents to minimize foaming or bumping within flask (handles flasks up to 5L).
For additional information on the Self-Cleaning Dry Vacuum System contact Welch Rietschle Thomas, 7301 N. Central Avenue, Skokie, IL 60077 USA.
Phone: 847-676-8800, Fax: 847-677-8606, email: welchvacuum@thomasind.com or visit our website at: www.welchvacuum.com
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