Buy Welch vacuum pumps from MSE Supplies at the best value. Welch ProBoost is an air cooled gas jet pump (commonly called a diffusion pump). The gas jet is formed by directing boiling silicone vapors through a hollow cone. There are no internal moving parts. The pumping action commences when the vacuum pressure in the still (i.e. wiped film) goes below 0.2 torr (200 millitorr). On an empty, leak free still, ProBoost backed by a rotary vane pump lowers the vacuum pressure to 0.00002 torr (20x lower in pressure than a 2-stage rotary vane vacuum pump can do alone). ProBoost backed by a rotary vane vacuum pump will lower vacuum pressure to below 0.0001 torr in high vacuum and Schlenk lines. This high vacuum is invaluable to improve the results from reactions using air-sensitive compounds such as organometallics, metal amides, and hydrides. ProBoost has a built-in control board for fan and heater. When you turn on ProBoost, the fan and heater both turn on. When you turn off ProBoost, the heater turns off immediately and the fan runs for another 20 minutes to cool the pump. It has unique features such as: High Vacuum to 10⁻⁵ torr Use with high vacuum and Schlenk lines Employs air cooled diffusion pump Easy Attachment to backing pump MSE Supplies is an authorized distributor of Welch vacuum pumps. Maximum Pumping Speed, Air 80 l/sec Ultimate Vacuum Pressure 0.00002 torr Minimum Back Pump FAD at 60 Hz 2.8 CFM Maximum Discharge Pressure 0.2 torr Ambient Environmental Temp 10–30°C Heat-up time 7 minutes Inlet Connection NW50 Discharge Connection NW25 Silicone Oil Capacity Approximately 30 ml Cool Down Time 20 minutes Pump Dimensions, L x W x H 5.5 x 5.4 x 7.5 in Weight 5.6 lbs (2.5 kg) Shipping Dimensions, L x W x H 13 x 10 x 10 in Shipping Weight 10 lbs (4.54 kg)
