Vacuum Quality

Better quality lab vacuum with VACUU•LAN®  local vacuum networks

Most lab vacuum is suitable for the simplest tasks, like filtration, solid phase extraction, and aspiration of liquids. Often operating at 100 — 250 mbar (70 — 140 Torr), central system lab vacuum is unable to provide the high-quality, controlled vacuum needed for rigorous scientific vacuum applications like sample drying and evaporation of common solvents at temperatures near ambient conditions. As a result, most labs duplicate vacuum supply: central lab vacuum is provided as part of the building infrastructure, but mainly serves chemistry filtration, solid phase extraction, and fluid aspiration applications; dedicated vacuum pumps are purchased as part of lab equipment to support more demanding lab operations.

VACUU•LAN® networks eliminate most of this service duplication by providing high-quality vacuum to every lab vacuum port. As illustrated on the Vacuum Scales figure, the small, local server pump in a VACUU•LAN® network can provide vacuum down to 2 mbar/1.5 Torr, so that it can serve evaporative applications well beyond the capacity of a central vacuum system. With vacuum at these levels, even DMF can be evaporated at near room temperature. As a result of this expanded vacuum range, a VACUU•LAN® network can replace central vacuum and dedicated pumps for nearly all lab applications except lyophilization, final drying and molecular distillation, which typically require vacuum of 10-3 mbar/Torr that can only be provided by oil-sealed, dedicated vacuum pumps.

Besides the vacuum pressure advantages offered by a VACUU•LAN® network, the vacuum provided is also more stable than that provided by a central vacuum system. With a central vacuum system, users in different labs can degrade the ultimate vacuum capability of the system, as well as causing sudden changes in pressure when ports open and close. These pressure changes can lead to cross-contamination between labs connected to the central lab vacuum system. With VACUU•LAN® technology, check valves in each port isolate applications when a pressure spike is detected, preserving conditions in individual applications until the network vacuum is restored, and the vacuum in each lab is isolated from other labs in the building.