Hydraulic Pump Design Gets Overhaul

High delivery, accurate control of the oil flow and ergonomic design are three characteristics of the Enerpac XA series air-driven, foot-operated hydraulic pump with Xvari technology. The pump features two pedals, for pressure build-up and pressure reduction, both of which are depressed with the ball of the foot, so that the heel stays on the ground to lessen fatigue. Although the pump footprint is larger than previous Enerpac hydraulic pumps, the unit is lower and more stable and compact. Also, hydraulic delivery is up to about 50% higher because Enerpac has used a rotating air motor and a two-stage rotating pump element instead of a linear air motor. The pump element has an eccentric shaft with cams for the separate drive of a low-pressure piston and a high-pressure piston. A planetary gearwheel reduces the speed of the air motor (20,000 rpm) to the 2,000 rpm that the hydraulic pump runs. Features include a completely closed housing manufactured from impact-proof plastic and a closed rubber oil reservoir.

Enerpac