Welch® Dry Pumps (Centrifugal Concentrators)

Product catalog summary

Overview: This document provides technical specifications and applications for Welch® Dry Pumps, specifically designed for use in centrifugal concentrators. The pumps are suitable for handling various solutions, including water, alcohol, aqueous, acidic, and organic solutions, and are particularly effective for DNA pelleting.

Specifications: The document details two main types of diaphragm pumps: the DRYFAST® PTFE Pump and the DRYFAST ULTRA® PTFE Pump. Both pumps have a flow rate of 35 L/min, with the DRYFAST operating at 9 Torr and the DRYFAST ULTRA at 2 Torr. These pumps are designed to be oil-free and virtually maintenance-free, making them cost-effective and space-saving solutions for laboratory environments.

Applications: The pumps are certified for use in specific centrifugal concentrator applications, efficiently evaporating aqueous, acidic, or organic solutions. They are chemically resistant to aggressive chemicals such as TFA, HCl, formic acid, and acetic acid. The document also lists various systems and applications, including Rotovap systems for volatiles and high boilers, concentrator pumps for small samples, vacuum manifold pumps, freeze dryer pumps, filtration pumps, aspiration systems, cell culture stations, vacuum drying pumps, and gel drying systems.

Key Advantages: The pumps offer several advantages, including quiet operation, no need for oil changes, and no requirement for cold traps when handling water and alcohol solutions. They are compact, saving laboratory space, and are developed for specific applications to ensure efficient performance.

Additional Information: The document notes that cold traps are not required for these pumps, although they can improve drying times for certain solutions. The pumps are available in 115V, 60Hz configurations, with other electrical requirements available on the Welch website. Contact information for Gardner Denver Thomas, Inc., Welch Vacuum Technology is provided for further inquiries.

Catalog excerpts

Welch® Dry Pumps (Centrifugal Concentrators)-1

Welch® Dry Pumps Cold Trap1 Applied Vacuum Technology for Centrifugal Concentrators Sample: Stand-Alone Diaphragm Pumps: Water and alcohol solutions2 DNA Pelleting Aqueous, acidic, or organic solutions DRYFAST® PTFE Pump 9 Torr 35 L/min Cat. No. 2044B-01 DRYFAST ULTRA® PTFE Pump 2 Torr 35 L/min Cat. No. 2042B-01 Key Advantages: Quiet, Oil-free Virtually maintenance-free solution for laboratory environment. Cost effective No oil changes, no cold trap for water/alcohol solutions. Smaller footprint than oil pump saves lab space. Application certified Developed for selected centrifugal concentrator applications to efficiently evaporate aqueous, acidic, or organic solutions when properly configured and with the chemical resistance to pump aggressive chemicals such as TFA, HCl, formic acid and acetic acid. Note: 1) Cold traps are not required to protect these pumps. Cold traps will condense vapors and increase effective pumping speed of system leading to improved drying times for aqueous, acidic or organic (B.P.>100 ˚C) solutions. 2) Cold traps are not required for water and alcohol solutions since these solutions are volatile. 3) Pumps listed are 115V, 60Hz. See Welch web site for other electrical requirements. 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, DRYFAST and DRYFAST ULTRA are registered trademarks of Gardner Denver Thomas, Inc., Welch Vacuum Technology.

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Welch® Dry Pumps (Centrifugal Concentrators)-2

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” 35 L/min. x 2 Torr (2.7 mbar) DRYFAST ULTRA SYSTEM Compatible with: SpeedVac® & CentriVap® 35 L/min. x 2 Torr (2.7...

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