Suitable for use with rotary evaporators for stripping low-boiling-point solvents such as pentane, alcohol, or methylene chloride or for concentrators
Welch's self-cleaning dry vacuum system is said to be 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 - ncluding the diaphragm itself.
The pump operates without oil, delivering a vacuum to 9Torr (12 mbar) with a free air displacement of 34l/min (1.2cfm).
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 minimise condensation when pumping heavy vapour 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).
