Category: Hydraulic Pumps

Yuken Reciprocal Pumps

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Yuken Reciprocal Pumps

These pumps have pistons installed at right angles against the pump rotating shaft in a plane including the shaft. The pistons reciprocate with alternately moving cranks or eccentric cams. Pumps suffer from discharge pulsation because they have a fewer pistons than the axial and radial types; however, they can operate at a high pressure of […]

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Yuken Screw Pumps

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Yuken Screw Pumps

These pumps operate by rotating two or three screw shafts, which are aligned and engaged in parallel, to continuously convey a volume structured with screw leads. Unlike the other types of pumps, they have no intermittent displacement variation and abrupt pressure variation. Because of the low noise level and reduced pulsation, they are used as […]

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Yuken Gear Pumps

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Yuken Gear Pumps

These pumps operate with two gears engaged with each other and rotating to feed a hydraulic fluid from the suction area to the discharge area. They all have fixed (constant) displacement capacities. They are categorized into external and internal gear pumps; the internal type generally has smaller discharge pulsation and lower noise level than the […]

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Yuken Variable Displacement Vane Pumps

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Yuken Variable Displacement Vane Pumps

Vane pumps can be transformed to the unbalanced type by making the center of the round cam ring eccentric to the rotating shaft; this type provides a pair of suction and discharge processes. The pumps can also be transformed to the variable displacement type by making the cam ring at the maximum eccentricity concentric with […]

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Yuken Multiple Vane Pumps

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Yuken Multiple Vane Pumps

These pumps are categorized into double and triple types. The double pump has two sets of cartridge kits on one shaft, and each of the kit works independently. Generally, this type contains a combination of low-pressure large- volume and high-pressure low-volume pump elements. The triple pump has three sets of cartridge kits and forms a […]

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Yuken Single High Pressure Vane Pump

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Yuken Single High Pressure Vane Pump

These pumps operate at 31.5 to 40 MPa (4 569 to 5 802 psi). The PV11R series pumps are available in two sizes, ranging from 2 to 22 cm3/rev (.122 to 1.34 cu.in./rev). Some of them have the pressure loading mechanism, while the others are provided with a unique valve structure that decreases and introduces […]

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Yuken Single Middle Pressure Vane Pump

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Yuken Single Middle Pressure Vane Pump

These pumps operate at 16 to 21 MPa (2 321 to 3 046 psi). The PV2R series, specially designed to reduce the noise level, are available in four sizes, ranging from 6 to 237 cm3/rev (.366 to 14.46 cu.in./rev). The pumps have a plate with a pressure loading, which changes the clearance between the rotor […]

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Yuken Single Low Pressure Vane Pump

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Yuken Single Low Pressure Vane Pump

These low pressure vane pumps, operated at 5 to 7 MPa (725 to 1 015 psi), are supplied as the PVL1, 50T, 150T, 250F, and 500F series. The pumps are available in the displacement of 1.5 to 498 cm3/rev (.092 to 30.4 cu.in./rev). They have a simple structure: clearances between the rotor and the vane […]

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Yuken Vane Pumps

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These pumps intake and discharge fluid according to the change of space enclosed by the vanes and the cam ring that rotates by means of the rotor. Vane pumps in a low/middle pressure range from approximately 7 to 25 MPa (1 015 to 3 626 psi) and with middle displacement; for example, the single middle-pressure […]

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Yuken Radial Piston Pumps

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Yuken Radial Piston Pumps

These pumps have pistons installed in a pattern radial to the pump rotating shaft. The pumps are more suitable for high pressure operation than the axial type. Figure 2.7 shows the structure of a typical radial piston pump. Piston stroke is achieved with an eccentricity of the piston-sliding ring to the pump rotating shaft. These […]

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