Thermo offers several different two-stage, oil-sealed, rotary vane vacuum pumps specifically designed for standard freeze drying applications. Each pump comes complete with a GBORK (Gas Ballast Oil Return Kit) and and Oil Mist Filter (EMF-10). The GBORK allows the user to apply full gas ballast to keep the oil clean without losing oil. The EMF10 filter the exhaust to keep environmental air clean. For applications involving aggressive solvents that might damage ordinary pumps, we recommend the LyoPump VLP195FD which also includes an active oil filtration system (VPOF110) that dramatically extends the life of the pump.
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