Welch® Dry Pumps Applied Vacuum Technology for Vacuum Ovens Chemistry: Types of Pump: Oven Size: Less than 2 ft3 (57L) 2 to 4.5 ft3 (127L) Water vapor WOB-L® Piston Pump Cold Trap Vacuum Oven Organic, acidic, and/or basic vapors DRYFAST ULTRA® Diaphragm PTFE Pump No oil contamination. No oil mess. No exhaust oil vapor(smoke). Cost effective No oil changes, no cold trap for light vapor loads. More portable than oil-sealed pumps. Easy to move from bench to bench. Application certified Developed and tested by Welch for selected vacuum oven applications such as drying of glassware, precipitates, food samples and soil samples.2 Satisfaction guaranteed when operated according to owner’s manual recommendations. Note: 1. May be used without a cold trap for light to moderate vapor loads(see page 32 of Welch lab catalog for complete trap selection table.) 2. Degassing or bake-out/curing may require millitorr vacuum level achieved with oil sealed vacuum pump. Consult your internal application specifications. 3. See page 14 of Welch lab catalog for more information and recommendations. Gardner Denver Thomas, Inc., Welch Vacuum Technology 7301 N. Central Avenue, Skokie, IL 60077 Phone: (847) 676-8800 Fax: (847) 677-8606 Email: [email protected] Web: www.welchvacuum.com Welch and DRYFAST ULTRA are registered trademarks of Gardner Denver Thomas, Inc., Welch Vacuum Technology WOB-L is a registered trademark of Gardner Denver Thomas, In

Welch® PumpsApplied Vacuum Technology for the Laboratory Welch Vacuum Pumps & Systems Flow Rate x Vacuum Unit Photo Schlenk Line Freeze Dryer Cell Harvester Plate Washer Vacuum Oven “Rotovap System” DRYFAST® System with regulator, gauge, condensate jars, self-cleaning auto-purge