Welch® Dry Pumps (Vacuum Ovens)

Product catalog summary

Overview: This document provides technical specifications and applications for Welch® Dry Pumps, specifically designed for vacuum ovens in laboratory settings. It highlights the types of pumps available, their applications, and key advantages.

Specifications:

Types of Pumps: WOB-L® DRYFAST ULTRA® Piston Pump, Diaphragm PTFE Pump.
Oven Size Compatibility:
- Less than 2 ft³ (57L): Cat. No. 2561B-50 (60L/min, 5 Torr), Cat. No. 2042B-01 (35L/min, 2 Torr).
- 2 to 4.5 ft³ (127L): Cat. No. 2581B-50 (100L/min, 5 Torr).

Key Advantages:

Oil-free operation eliminates oil contamination and exhaust oil vapor.
Cost-effective with no need for oil changes or cold traps for light vapor loads.
Compact and lightweight design for easy portability.
Application certified for specific vacuum oven applications such as drying glassware, precipitates, food samples, and soil samples.

Applications:

Rotovap Systems: Suitable for volatiles and low boiling point substances with DRYFAST® System (35 L/min, 9 Torr).
Concentrator Pumps: For samples less than 2ml, DNA pelleting with DRYFAST ULTRA Pump (35 L/min, 2 Torr).
Vacuum Manifold Pumps: For Schlenk Line and DUOSEAL® & CHEMSTAR® Pumps with <1 millitorr capability.
Freeze Dryer Pumps: Direct Drive pump with integral oil filtration system (173 L/min).
Filtration and Aspiration Systems: Chemical and standard duty options available.
Gel Drying Systems: GELMASTER™ System for complete gel drying with >50 L/min of vapor.

Recommendations:

For light to moderate vapor loads, pumps may be used without a cold trap.
For degassing or bake-out/curing, a millitorr vacuum level achieved with an oil-sealed vacuum pump may be required.

Contact Information: Gardner Denver Thomas, Inc., Welch Vacuum Technology, 7301 N. Central Avenue, Skokie, IL 60077. Phone: (847) 676-8800, Email: [email protected], Web: www.welchvacuum.com

Catalog excerpts

Welch® Dry Pumps Applied Vacuum Technology for Vacuum Ovens Chemistry: Types of Pump: Oven Size: 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, Inc.

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Welch® Pumps Applied Vacuum Technology for the Laboratory Application Welch Vacuum Pumps & Systems Flow Rate x Vacuum Unit Photo “Rotovap System” Volatiles, Low B.P. B.P. <100˚C Samples 0-5 Liter DRYFAST® System with regulator, gauge, condensate jars, self-cleaning auto-purge 35 L/min. x 9 Torr (12 mbar) “High Boiler System” DRYFAST ULTRA® System & Pump 35 L/min. x 2 Torr (2.7 mbar) DMF, Toluene, other non-volatiles Samples 0-5 Liter 35 L/min. x 2 Torr (2.7 mbar) “Concentrator Pump” DRYFAST ULTRA Pump 35 L/min. x 2 Torr (2.7 mbar) DRYFAST ULTRA SYSTEM Compatible with: SpeedVac® & CentriVap® Vacuum...

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