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DP21 Medium and High Pressure Vane Pump

Key words:Hydraulic tools

Category:

YB-D series medium and high pressure vane pumps

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Details

Specification

Sub-series	Model
DP 21	YB-D 12.5～25/4～10

Model Code

Installation and Use

1. During installation, the concentricity tolerance between the pump shaft and the motor must be less than 0.10mm (TIR), and the maximum allowable angular error must be less than 0.2 degrees. When using a flexible coupling, the pump shaft must not bear radial and axial loads; the bracket must be strong and rigid, and able to fully absorb vibrations.

2. During installation, it is recommended that the pump suction port should be located in a position that is easy to start oil suction.

3. Fixed pipelines, especially the inlet pipeline, need to be sized according to the diameter, and a safety pressure relief valve should be assembled in the system; the set pressure of the safety valve should not be greater than the maximum pressure of the pump; the inlet pipeline must be strictly sealed to prevent oil leakage, and the return oil nozzle should be located below the liquid level.

4. Before starting the pump, check the inlet, outlet, and rotation direction. When operating the pump, if it is newly fixed or has not been used for a long time, air should be released from the outlet.

And start the pump under no-load conditions as much as possible (preferably with the pump filled with oil).

5. When the pump is fixed above the oil level in the tank, the suction height should be less than 500mm, the inlet should be located below the oil level in the tank, and the positive pressure of the inlet should be limited to within 0.03 MPa.

6. The oil should be kept clean; the pipelines and tank must be thoroughly cleaned. A filter with sufficient capacity should be fixed 50mm from the pump inlet, and a precision of 100μm is recommended. A precision filter with a precision of 25μm should be assembled in the system. The cleanliness of the oil should be within NAS12.

7. The operating temperature of the oil should be controlled between 15℃ and 55℃. If the pump is started in a cold environment, the oil should be heated, and after the pump is turned on without load, it should continue to run without load.

8. Pay attention to the viscosity and quality of the oil. It is recommended to use anti-wear hydraulic oil at low temperatures, such as No. 32 oil.

9. After fixing the pump, manually rotate the pump shaft evenly and flexibly.

Installation Connection Dimensions

Sub-series

Φ90

DP21

259

114

146

110

-0.036

-0.071
Φ128

Φ20

-0.013

0
Φ11

NPT 1

NPT 3/4

NPT 1/4

72.5

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