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4525V vane pump, lower noise

Key words:Hydraulic tools

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V-series low noise vane pumps

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Specification

Series	Displacement code of shaft end pump	Displacement code of cover end pump
4525V	42, 45, 50, 57, 60, 66, 75	10, 12, 14, 15, 17, 19, 21, 25

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. Use a flexible coupling; the pump shaft must not bear radial and axial loads; the bracket must be strong, rigid, and able to fully absorb vibration.

2. Fix the pipeline according to the diameter, especially the inlet pipe, and assemble a safety pressure relief valve in the system (the inlet flow rate is between 0.5 and 1.5 m/s). The set pressure of the safety valve must not exceed the maximum pressure of the pump; the inlet pipe must be strictly sealed and must not leak; the oil tank should be equipped with a diaphragm to separate bubbles and dirt from the oil; the oil return nozzle should be below the liquid level, with a minimum depth of 50mm, to avoid bubble formation even at low levels.

3. Set the suction pressure at the pump inlet: Hydraulic oil for hydraulic oil is +35~ -16.7 KPa. Hydraulic oil for water-ethylene glycol and phosphate esters is +35~ -10.1 KPa.

4. If the pump is installed on the oil tank or above the oil tank cover, the suction port height of the pump should be less than 500mm.

5. The oil should be kept clean, and the pipelines and oil tank must be thoroughly cleaned; a precision filter should be assembled in the system, with a recommended accuracy of 25μm, and the oil cleanliness should be within NSA12. A filter with sufficient capacity (the rated flow rate should be more than twice the pump flow rate) should be fixed 50mm from the pump inlet, with a recommended accuracy of 100μm (150 mesh).

6. It is recommended to use anti-wear industrial hydraulic oil or automotive crankcase oil with the letter identification SC, SD, SE, or SF, with a viscosity grade of 32 to 68 cSt at 40℃.

Preferred viscosity at rated speed and pressure:

Minimum 13cSt Maximum 54cSt

Minimum 49℃ Maximum 65℃

7. Check the inlet, outlet, and rotation direction before starting the pump. After fixing the pump, manually rotate the pump shaft evenly and flexibly. It is best to fill the pump with oil during the first use.

During initial operation or operation after a long shutdown, the pump may have difficulty sucking in liquid; in this case, an exhaust valve should be installed on the discharge side in advance, or the air should be discharged by slightly loosening the connection on the discharge side. When starting, try to intermittently run the pump without load.

8. Do not start the pump when the outlet pressure is lower than the inlet pressure. This will cause operating noise and blade instability.

9. At startup, if the viscosity of the oil is higher than the suitable viscosity (54cSt), the pressure should be limited to 50% or less of the respective rated value until the system warms up.

Installation Connection Dimensions

◎ Key Shaft

Model	Shaft Cooling	A	B	C	D	E	F Key Width × Length
4525V	1	62	12.7	14.2	31.75/31.70	35.25/35.10	7.94×28.5
4525V	86	87.4	12.7	14.2	38.075/38.05	42.4/42.25	9.54×50.8

◎ Serration Shaft

Model	Shaft Cooling	A	B	C	D	E	Serration Data
							Quantity Number of Teeth	Pitch	Major Diameter Minor Diameter	Square Root Minor Diameter	Matching 12/24
4525V	11	61.9	12.7	14.3	9.7	39.6	14	31.7/31.67	26.99/26.64	Major Diameter Fit	Large diameter fit

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