+
  • 4520VQ-1(1).png
  • 4520VQ-2(1).png
  • 4520VQ-3(1).png

4520VQ Vane Pumps with High Speed and High Pressure

Key words:

VANE PUMP
VQ
HYDRAULIC PUMP
VQ Series vane pumps with high performance and high pressure which designed for constraction machinery especially for mobile machinery. Features: 1.Designed by intra-vane structure, reduce the vane pressure to rotor, makes stable performance and longer life in high speed and pressure. 2.To adopt folating structure for side plate,will do a compensation for end-face clearance by automatic,makes high speed and high pressure which can up to 21MPa. 3.The plate is made of dual-metal material, improved the seizure resistance. Complete displacement, composite structure and high pricise spare parts allows convenient maintenance.

Details

Specifications

 

SeriesDisplacement code of shaft end pumpDisplacement code of cover end pump
4520VQ42、 45、 50、 57、 60、 66、 752、 3、 4、 5、 6、 7、 8、 9、 10、 11、 12、 14

 

 

Model Code

 

 

 

Installation and Use

 

1. During installation, the concentricity tolerance between the pump shaft and the motor must be less than 0.10 mm (TIR), the maximum allowable angular error must be less than 0.2 degrees, and a flexible coupling must be used; the pump shaft must not bear radial and axial loads; the bracket must be strong, rigid, and able to fully absorb vibration.
2. Set the suction pressure of the pump inlet: The recommended inlet pressure is 0 to 35 Kpa.
3. The oil should be kept clean, and the pipelines and oil tank must be thoroughly cleaned; the cleanliness of the oil should be within the NSA12 range.
4. Normal pump operation (under rated conditions) is based on the use of SAE10W oil (or equivalent viscosity) within the range of 38℃ to 82℃.
5. Check the inlet, outlet, and rotation direction before starting the pump. After fixing the pump, manually rotate the pump shaft evenly and flexibly. During the first start-up, if the pump does not pump immediately, air should be discharged from the pump's delivery pipeline.
6. For the first use, the pump body and oil suction pipe should be filled with oil, and the pump should not run without oil.
7. Do not start the pump when the outlet pressure is lower than the inlet pressure. This will cause operating noise and blade instability.
8. Cold start conditions: When operating SAE10W oil in the range of 860 to 40 cSt, the speed and pressure should be limited to 50% or less of their respective rated values until the system warms up. When the fluid viscosity is greater than 860 cSt, extreme caution must be exercised when starting the equipment, and attention should be paid to heating the entire system, including remote cylinders and motors.
9. At high temperatures, the viscosity should not be lower than 13 cSt, and the temperature should not exceed 99℃, because the expected life of the card airbag and elastomer will be reduced.

 

Installation Connection Dimensions

 

 

 

◎ Str. Key shaft

 

ModelCold of shaftABCDEF Key
Width × Length
4520VQ16212.714.231.75/31.7035.25/35.107.94×28.5
8687.412.714.238.075/38.0542.4/42.259.54×50.8

 

 

◎ Spline shaft

 

ModelCold of shaftABCDESpline Data
Number of TeethPitchMajor DiameterMinor DiameterFlast root fit
4520VQ1161.912.714.39.739.61412/2431.7/31.6726.99/26.64Large
diameter fit

 

Get Quote

Welcome to leave a message, there may be a discount

Note: Please leave your contact information and our professionals will contact you as soon as possible!