Oil Pump - 3:1 ratio, air operated, stationary oil pump in stub style. Includes connecting hoses, and air line filter. For tanks or drums with 2" openings. Air inlet 1/4" NPT, fluid outlet 3/4" NPT, bottom inlet 3/4" NPT and pressure relief port 1/4" NPT. Maximum air pressure 145 PSI (10 bar). Working pressure of 100 PSI (7 bar). Self lubricating, double acting. Weights 5 1/2 lbs. Includes pressure relief valve when used in fixed installations or where fluctuations in temperature or product expansion is likely to occur. Do not use for flammable liquids.