Series 33

Sizes NG71, 90

Nominal pressure 400 bar

Peak pressure 450 bar

Closed circuit

For the drum drive in mobile concrete mixers

Features

- Variable axial piston pump of swashplate design for hydro-static closed circuit transmission

- Flow is proportional to drive speed and displacement and is infinitely variable

- Flow increases with the swivel angle of the swashplate from 0 to its maximum value

- Flow direction changes smoothly when the swashplate ismoved through the neutral position

- Two pressure-relief valves are provided on the high pressure ports to protect the hydrostatic transmission (pump and motor) from overload

- The high-pressure relief valves also function as boost valves

- The integrated boost pump acts to replenish leakage and provide control oil.

- The maximum boost pressure is limited by a built-in boost-pressure-relief valve