Ideal for use with gel dryers, concentrators, or a rotary evaporator for stripping low-boiling-point solvents such as pentane, alcohol, or methylene chloride
Welch's model 2025 self-cleaning dry vacuum system is said to be ideal for use with gel dryers, concentrators, or a rotary evaporator for stripping low-boiling-point solvents such as pentane, alcohol, or methylene chloride.
System's two-stage, flexible diaphragm pump resists chemical vapours thanks to fluorinated plastics used on all wetted surfaces - including the diaphragm itself.
Pump operates without oil, delivering a vacuum to 9Torr (12 mbar) with a free air displacement of 34l/min.
Plus, patent pending 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 system lets the user regulate the vacuum level, while a dial pressure gauge permits monitoring of set value - a feature especially useful when pumping low-boiling solvents to minimise foaming or bumping within flask (handles flasks up to 5l).
