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25VQ high-speed, high-pressure vane pump

Key words:Hydraulic tools

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VQ series high-speed and high-pressure vane pumps

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Specification

Model	Displacement Code	Geometry Displacement mL/r	Anti-wear oil or Phosphate ester fluid		Weight Kilograms
			Maximum Pressure MPa	Maximum Speed r/min
25VQ	10	32.5	17.5	2700	14.8
	12	38.3
	14	43.3
	15	47.3		2500
	17	52.5
	19	60
	21	65.0
	25	78.6	14

Note: ①When the working fluid is phosphate ester fluid, use special sealing (FPM). Add the prefix [F-] before the specified model when ordering.

②The outlet pressure must always be higher than the inlet pressure.

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 and rigid, and able to fully absorb vibration.

2. Set the suction pressure of the pump inlet port: 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) in 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 immediately prime, 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 cartridge and the elastomer will be reduced.

Installation connection dimensions

◎Key Shaft

Model	Shaft Cooling	A	B	C	D	E	F Key Width × Length
25VQ	1	59	9.5	11.0	22.225/22.20	24.5/24.35	4.75×32
	2	73.2	9.5	11.0	27/26.975	30.45/30.32	7.94×40
	86	78	9.5	11.0	25.4/25.37	28.3/28.2	6.35×50.8

◎Spline Shaft

Model	Shaft Cooling	A	B	C	D	E	Spline Data
							Number of Teeth Teeth	Pitch	Large Diameter	Small Diameter	Square Root Matching
25VQ	11	44.5	9.5	11.1	3.9	27.8	13	16/32	22.17/22.15	18.63/18.35	Large Diameter Matching

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