Parker Balston 75-45 Purge Gas Generator Medical Lab Equipment. This generator is for parts unable to test this unit. Thank You For Looking At Are Item17. The item "Parker Balston 75-45 Purge Gas Generator Medical Lab Equipment" is in sale since Tuesday, November 27, 2018. This item is in the category "Business & Industrial\Healthcare, Lab & Dental\Medical & Lab Equipment, Devices\Other Medical & Lab Equipment".The seller is "buyhitek" and is located in Milton Freewater, Oregon. This item can be shipped worldwide.