Welch Duo Seal Two Stage High Vacuum Pump. 1 HP General Electric Motor. Please see picture for additional details.You can contact me at. If you have any questions. Please see pictures for additional details. The item "Welch Duo Seal Two Stage High Vacuum Pump Model 1397 R Industrial" is in sale since Friday, February 11, 2011. This item is in the category "Business & Industrial\Hydraulics, Pneumatics, Pumps & Plumbing\Pumps & Pump Accessories\Vacuum Pumps\Other Vacuum Pumps". The seller is "amiron11" and is located in Oxnard, California. This item can't be shipped, the buyer must pick up the item.