UNIWELD VBD-Series pumps are specifically designed for both industrial and laboratory applications. The belt drive design makes it the best of mechanical rotary sliding vane pumps with respect to ultimate vacuums, pumping speeds, long-life, efficiency and ease of maintenance. Compound stage pumps provide ultimate deep vacuums and are factory tested to levels of 10 microns. All units have a larger than normal oil reservoir, that assures extended pumping efficiency with fewer oil changes. Time tested and proven to be a quality vacuum pump.