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SQP3 vane pump, lower noise

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SQP series low noise vane pumps

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Specification

Subsidiary Series	Displacement Code	Geometry Displacement mL/r	Use anti-wear oil or Phosphate ester liquid		Water-ethylene glycol liquid		Oil-in-water emulsion		Minimum speed r/min	Weight Kilograms
			Max. Pressure MPa	Max. Speed r/min	Maximum pressure MPa	Max. Speed r/min	Max. Pressure MPa	Max. Speed r/min
SQP3	21	67	17.5	1800	16	1500	7	1200	600	35
	25	81
	30	95.0
	32	100
	35	112
	38	121
	45	145	14		14

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

②Allow instantaneous (peak) pressure to exceed the maximum pressure rating by 10% for 0.5 seconds.

Model code

Installation and Use

1. During installation, the concentricity tolerance of the pump and motor must be less than 0.10mm (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. Fixed pipelines, especially the inlet pipeline, must be sized according to the port size, and a safety relief valve must be assembled in the system (inlet flow rate 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 pipeline 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, even at low positions, to avoid the formation of bubbles.

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 ester 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 (rated flow rate should be more than twice the pump flow rate) should be fixed 50mm above the bottom of the oil tank at 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 SC, SD, SE, or SF letter identification, 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 add oil to the pump for the first use.

In the initial operation or operation after a long rest, the pump may have difficulty in sucking liquid; in this case, a vent 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, operate the pump intermittently without load as much as possible.

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. When starting, 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 size

◎ Key shaft

Model	Shaft cooling	A	B	C	D	E	F key Width × Length
SQP3	1	73.2	9.5	11.1	31.75/31.72	35.25/35.10	7.94×40
SQP3	86	86.4	9.5	11.1	34.90/34.87	38.4/38.15	7.94×54

◎ Serration shaft

Model	Shaft cooling	A	B	C	D	E	Serration data
							Quantity Number of teeth	Pitch	Large diameter Small diameter	Flat root Small diameter	Matching 12/24
SQP3	11	58.7	9.5	11.1	6.35	35.1	14	31.7/31.67	26.99/26.64	Large diameter fit	Large diameter fit

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