Hydraulic Axial Vz50 Vz63 Vz80 Vz100 Vz130 Vz Piston Pump
--Highly intensified output Adopting the cradle swash plate has achieved high pressure in a compact and light-weight body, resulting in increased output per unit weight.
--Low noise
While increasing the rigidity of the swash plate structure, the noise level has
been substantially reduced thanks to the housing geometry resulting from the
state-of-the-art measurement and analysis technologies.
--High efficiency
The spherical valve plate and optimum hydraulic balance realize stable and
highly efficient operation over a broad range of operation conditions.
--Long life
Adopting the spherical valve plate with its superior.
Details regarding the choice of hydraulic fluid
The correct choice of hydraulic fluid requires knowledge of the operating temperature in relation to the ambient temperature: in
a closed circuit the circuit temperature. The hydraulic fluid should be chosen so that the operating viscosity in the operating temperature range is within the optimum range (νopt) - the shaded area of the selection diagram. We recommended that the higher viscosity class be selected in each case. Example: At an ambient temperature of X °C an operating temperature of 60 °C is set. In the optimum operating viscosity range (νopt; shaded area) this corresponds to the viscosity classes VG 46 or VG 68; to be selected: VG 68. Please note: The case drain temperature, which is affected by pressure and speed, is always higher than the circuit temperature. At no point in the system may the temperature be higher than 115 °C. If the above conditions cannot be maintained due to extreme operating parameters, please consult us.
Hydraulic fluid
Before starting project planning, please refer to our data sheets RE 90220 (mineral oil), RE 90221 (environmentally acceptable hydraulic fluids) and RE 90223 (HF hydraulic fluids) for detailed information regarding the choice of hydraulic fluid and application conditions. The variable pump A4VG is unsuitable for operation with HFA, HFB and HFC. If HFD or environmentally acceptable hydraulic fluids are being used, the limitations regarding technical data and seals mentioned in RE 90221 and RE 90223 must be observed. When ordering, please indicate the used hydraulic fluid.
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