Air Operated Hydraulic Pump. The 'turbo ' air operated hydraulic pump utilises exhaust air to help power the pump, developing 700 bar hydraulic pressure with only 5.5 bar air supply. The air control and valve functions can be easily operated by foot or hand , via a treadle. Patented "Air saver " feature for lower air consumption and lower operating costs Air exhaust muffler for quieter operation and reduced operator fatigue Return-to-tank port for use in remote valve applications Air and oil inlet filters for reduced risk of damage from contamination Extensive use of engineered plastics for lightweight, corrosion resistance and durability Internal pressure relief valve for overload protection Valve function; Advance/ Hold / Retract 1/4 NPT Air input swivel adaptor Air pressure range 2.7 to 10.3 bar