Variable Displacement Pump A7V170EP
- 1.Variable displacement pump, axial piston, bent axis design, for hydrostatic transmissions in open circuits.
- 2.The flow if proportional to the drive speed and the displacement and is steplessly variable at constant drive speed.
- 3.Comprehensive programme of control devices for every control and regulation function.
- 4.Operation of both mineral, and fire-resistant fluids
- 5.High performance rotary group with well-proven spherical control area offering the following advantages; self-centering, low peripheral speed, high efficiency
This product shows great market prospects and limitless potential.
Product Description
| Beijing Huade Hydraulic Industrial Group Co.,ltd | Variable Displacement Pump A7V170EP For open circuits ,axial tapered piston, bent axis design | |
| Size 170 | Peak pressure up to 40MPa | |
Technical data
Working speed 1500rpm
Rated working pressure 25MPa
Maximum working pressure 28MPa
Oil working viscosity range
In order to obtain the best efficiency and service life, we recommend the working viscosity in the following range
Within selection(Under working temperature):
V=16--36mm²/S
For the temperature of the fuel tank in an open circuit.
Viscosity limit
The viscosity limits are as follows:
Vmin=10mm²/S, for the short-term maximum allowable oil leakage temperature t=90℃
Vmin=1000mm²/S, for short-term cold start
Please note that even in local areas (such as bearing parts), the maximum temperature cannot be exceeded.
note:
The temperature of the leaking oil (case drain oil) is always high due to pressure and Uda speed
At the loop temperature. However, the temperature everywhere in the oil circuit cannot exceed 90°C.
If the above conditions cannot be met due to extreme operating parameters or too high ambient temperature
Please contact us.
Hydraulic oil selection instructions
In order to select the hydraulic oil correctly, it is necessary to know the temperature in the oil tank related to the ambient temperature
Operating temperature (open circuit).
The selection of the hydraulic oil should make the working viscosity of the hydraulic oil within the working temperature range within 0
Optimal range (Vopt)( See the shaded part of the hydraulic oil selection diagram) for each
For a specific case, we recommend to choose a higher viscosity within the allowable range
Grade.
For example, when the ambient temperature is x ℃ and the working temperature in the loop is 60 ℃, the
Best practices
Circumference (Vopt) In this case, it corresponds to
For viscosity grade VG46 or VG68, VG68 should be selected.
Oil filtration
The cleaner the oil is filtered, the better the cleanliness level of the oil is
The longer the service life of the parts.
In order to ensure the performance of the axial piston element, the minimum cleanliness level is:
NSA 1638, grade 9
ISO / DIS 4406 grade 18 / 15
Temperature range (see Selection Chart)
tmin=-25℃
tmax=+80°℃
This product is highly appreciated by customers consistently due to these features.
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