Profile: Blackmer, A Dover Co. is a manufacturer of positive displacement pumps, centrifugal pumps & compressors for the transfer of liquid & gas products which are used in a variety of industries including LPG, chemical processing, refined fuels, petroleum, food & sanitary and the mobile transport industries. Higher speed and greater capacities in a motor speed vane pump are available with the Blackmer ProVane motor speed pump series, specifically designed for process applications where efficiency, performance and value are desired.