Ace Glass 6703-15 Boulanger Self-Washing Rotary Evaporator Trap, 24/40-14/20, 250 mL

Self-washing rotary evaporator trap. Unique design incorporates an inverted, straight, heavy-walled expansion chamber that allows for flow-back of bumped materials. Condensation of evaporated solvent on walls of trap continuously rinses trap during operation. Vacuum stem has two opposing holes, flush with bottom of stem, to allow solvent vapor to rapidly flow out, while allowing condensed solvent to return to flask. This feature means the evaporator shaft is also continuously rinsed and the material returned to the flask. To prevent pooling of the condensate in the shaft trap, the end of the trap has a center hole for complete drainage. When solids are bumped onto the sides of the trap toward the end of solvent evaporation, introduction of a small amount of solvent at top of trap with a swirling motion effectively rinses the material back into the flask.