Welch Gardner Denver direct-drive rotary vane vacuum pumps achieve vacuum levels down to 1 x 10-4 Torr (0.1 micron) with flows up to 11.3 cfm. These compact, portable oil-seal pumps are recommended for a variety of laboratory applications. Vacuum system configuration with a cold trap is recommended for use with harsh chemicals. Direct drive pumps are not recommended for filtration, aspiration, drying electrophoresis gels, or other applications requiring sustained operation above 30 Torr.

The new product series CRVpro provides highest reliability for stable operation and long product lifespan. Customers benefit from a reduced risk of chemical attacks and oil breakdown by diluting aggressive chemicals with a larger oil chamber. Its cool running characteristic also slows down any corrosion process. Additionally a chemical resistant coating protects the stationary components.

DuoSeal vacuum pumps are known for their ruggedness world-wide. These pumps have large oil reservoirs to dilute contaminants. Low pump rpm to reduces friction and wear while minimizing reservoir temperature to lessen chemical reactivity. Pumps can be ordered with an optional exhaust filter to control oil mist.