Sauer 20 Series Hydraulic Pumps 
Application Range： 
Concrete mixers, mining machinery, vehicles, industrial, road rollers, pavers, 

stabilized soil mixing machine, concrete pump, pharmaceutical machinery, etc. 

Sauer Series 20 Axial Piston Variable Displacement Pump Features:
1. Series 20 Axial Piston Variable Displacement Pumps are well engineered and easy 

to handle.
2. The full-length shaft with a highly efficient tapered roller bearing 

arrangement offers a high loading capacity for external radical forces.
3. The pumps can be connected with other additional pumps.
4. The hydro-mechanical servo displacement control maintains the selected swash 

plate position and hence pumps displacement.
5. Upon release of the control handle, the swash plate automatically returns to 

zero position and the flow reduces to zero.
6. High case pressures can be achieved without leakage even at the lowest 

temperatures by using suitable shaft seals.
7. The servo valve arrangement offers the facility to incorporate function 

regulators and remote control systems.
8. Axial piston units are designed for easy servicing. Complete dismantling and 

reassembly can be carried out with standard hand tools, and all components or sub

-assemblies are replaceable.

Technical Spec.for Hydraulic Pump
Parameter    Units    Specification
Model No.                PV20        PV21        PV22    PV23
Max.displacement    ml/r    33.3    51.6    69.8    89
Max.flow    l/min            119.54    180.6    196.14    230.51
Charge pump displacementml/r    12.3    16.2    18.03    18.03
Max.pressure    Mpa            35
Rated pressure    Mpa            21
Max.control pressure    Mpa     3.5
Charge pressure    Mpa             0.8-2.0
Max.case pressure    Mpa    Constant0.25 Peak value0.5
Max.speed    r/min             3590    3500    2810    2590
Min.speed    r/min             500
Rated speed    r/min             1500
Dynamic 
viscosity range 
of the operating 
fluid                           10001
Start                           12-600
Operating                        25-35
Optimum condition        
Operating fluid        Mineral oil
operating Temperature    ℃    -40  to  +50
Max.operating temperature 
of the oil tank    ℃    80
Filtering precision of 
the operating fluid     μm    10
Shaft direction          clockwise/anti-clockwise
Max.tilt angle of yhe swash       º    ±18
Weight    KG                      45       53       63       78