Capture Condenser Assembly for DryFast Self-Cleaner Pumps
Includes:
- condenser
- 1 liter round bottom flask
- tubing
- support
- clamps
Features:
- Protects lab air quality
- Enables Cradle-to-Grave chemical handling
- Spatially efficient, easy to setup / clean-up
Evaporating a solvent under less-than-ideal conditions? Now you can overcome evaporator setup and condenser cooling limitations to minimize vacuum pump solvent emissions. The Welch Capture™ vapor recovery system can improve total solvent emission recovery efficiency to near 99%. The Capture option is a highly efficient condenser and mounting system, cooled by tap or chilled water.
Even under good distillation conditions, volatile solvent vapors can be emitted from your vacuum pump. With stressed conditions, a high percentage of solvent vapors can be pulled through your vacuum pump - and discharged into the atmosphere. Use Capture to maintain excellent solvent recovery for the most difficult distillations.
Figure 1 illustrates the importance of using a Capture recovery system. Using a 35° C water bath and constant rotational speed, methylene chloride is distilled using two temperatures of cooling water for both the rotovap and Capture condensers. The lower the condenser operating temperature, the more efficient the collection.
At properly moderated vacuum levels (Bars 1 & 2), the rotovap condenser contains a high portion of the condensate.
At full vacuum (Bars 3 & 4), vapors are pulled through the vacuum pump and released into the atmosphere - unless you use a Capture recovery system!
Application Note:
Operating Solvent Emission
Recovery Systems Effectively
More Vacuum is NOT always a Better Vacuum
Good emission control begins with proper balance of your vacuum application. If vapors are pulled through a foreline trap faster than they can condense, the downstream need for additional trapping is increased. Proper use of Tunable pumps like the DRYFAST®‚ DRYFAST ULTRA‚ and Self-Cleaning Dry Vacuum Systems will enable precise vacuum control and reduce emission potential. Rotary evaporation applications should always operate at vacuum levels below "bumping" potential. Use mass balance to verify that your cold trap is actually capturing all solvents/solids - not passing it through to the pump.
