air operated piston pumps. Ultra high pressure double acting pump. 200:1 pressure ratio pump designed for use in oil and gas wells in wireline and plug valve applications. In wireline applications, these pumps are used to seal against the well external pressure, preventing the tube from collapsing as the well is perforated. In plug valve applications, these pumps pump heavy grease into “christmas tree valves”, sealing any gas leak. Features: · 8” air motor effective diameter for maximum power. · Well proven, no stall and no ice forming air motor.