Variable displacement axial piston pumps (Series S, H & H2)

Variable displacement axial-piston pumps in swashplate design are used for hydraulic actuators combined of pump and motor, operating in closed circuit systems. They are used for driving mobile machines, like combines, or rotating technological equipment, like transit mixer drums, etc.
Axial-piston pumps are easily controlled and relatively compact. Pump flow is directly proportional to the cylinder block speed and displacement varied with the swashplate position. Flow direction is reversed with a tilt of the swashplate in either of the opposite directions from its neutral position.

Modular control valve adjusting provides flexibility of control combinations.

MH - hydromechanical proportional control system. Due to the control system the swashplate is held in the required position, thus maintaining amount of the flow at the preset level.

ER - electrohydraulic 3 positioned control system. Used for drive operating to the system turn on-turn off-turn on. Can be supplied with maximum displacement control.

HD - hydraulic proportional control system. The swashplate is held in the required position, due to the hydraulic indicators. Used on the machines where the pump flow requires continuous adjustment to the working loads challenged on the suspended or mounted equipment.

EP - electrical proportional control system. Due to current intensity on two proportional magnets displace-ment is changed steplessly.

The design of 90 and 112 ccm pumps allows to have tandem combinations.