A4vtg collection  CZPT piston Pump commonly employed

 
Brueninghaus Hydromatik CZPT A4VTG pump
 
Concrete mixer hydraulic piston pump A4VTG71, A4VGT90

Closed circuit
Sequence 32
Sizes seventy one, ninety
Nominal pressure 5800 psi (400 bar)
Highest strain 6500 psi (450 bar)
Handle unit: (HW) Proportional management hydraulic, mechanical servo, hexagon shaft with lever to the rear.
(EP) Proportional manage electrical, with crisis actuation and spring return.
 
For the drum generate in mobile concrete mixers A4VTG071, A4VGT090 series.
-Variable axial piston pump of swash plate design for hydrostatic drives in shut circuit
-The flow is proportional to the push pace and displacement.
-The flow will increase as the angle of the swash plate is altered from zero to its optimum benefit.
-Circulation path modifications smoothly when the swash plate is moved via the neutral place.
-Two strain-relief valves are supplied on the large force ports to shield the hydrostatic transmission (pump and motor) from overload.
-The high-force reduction valves also perform as improve valves.
-The integrated boost pump functions as a feed pump and control force supply.
-The highest increase stress is minimal by a developed-in enhance stress-relief valve.
-Tapered shaft option for direct travel shaft yoke installation. 

CZPT Data 
Desk of values (theoretical values, with no efficiency and tolerances values rounded)