4525VQ Vane Pumps with High Speed and High Pressure

Category:

VQ series vane pumps with high speed and high pressure

Summary:

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 21 MPa. 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.

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Message Tel:+86-0576-87759882 E-mail:xjylhmc@163.com

Description

Specifications

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

Model Code

Installation and Use

1. In installation, the tolerance of concentricity between shaft of pump and motor must be less than 0.10mm(TIR) and the maximum permissible angle error is less than 0.2 degrees by using the flexible coupling; The pump shaft shall not bear the radial and axial load ; The carrier must be firm with good rigidity and can fully absorb vibrations.

2. Set the suction pressure at pump inlet port : Recommended inlet pressure is 0 to 35Kpa.

3. Oil should be kept clean, pipes and tanks must be thoroughly cleaned; The cleanness level of oil should be within NSA12.

4. Nomal pump operation(at rated conditions)is based on the use of SAE10W oil in the 38 ℃ to 82℃ range (or comparable viscosities)

5. Check the inlet, outlet and direction of rotation before starting the pump. Turn the shaft of pump evenly and nimbly by hand after fixing the pump. At the time of first-starting ,if the pump does not immediately prime , air should be bled from the pump delivery line .

6. When first put into use, the pump body and oil suction pipeline should be filled with oil, and the pump shall not be allowed to operate without oil.

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

8. Cold start condition：When operating SAE10W oil in the 860 to 40 cSt range, the speed and pressure should be limited to 50% or less of their respective rated values until the system has warmed up. Extreme caution must be used when starting units when fluid viscosity are greater than 860 cSt, Care should be exercised to warm up the entire system, including remote cylinders and motors.

9. At high temperature, viscosities must not be less than 13cSt, Temperatures should not exceed 99 ℃ because the expectancy of cartridge kite and elastomers will decrease

Install Connection Dimensions

◎Str. Key shaft

Model	Cold of shaft	A	B	C	D	E	F Key width×Length
4525VQ	1	62	12.7	14.2	31.75/31.70	35.25/35.10	7.94×28.5
4525VQ	86	87.4	12.7	14.2	38.075/38.05	42.4/42.25	9.54×50.8

◎ Spline shaft

Model	Cold of shaft	A	B	C	D	E	Spline Data
							Number of Teeh	Pitch	Major Diameter	Minor Diameter	Flast root fit
4525VQ	11	61.9	12.7	14.3	9.7	39.6	14	12/24	31.7/31.67	26.99/26.64	Large diameter fit

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YONGLING HYDRAULIC

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xjylhmc@163.com