Technical Data of YUKEN PV2R Series Single Vane Pumps
I. Product Overview
The YUKEN PV2R series is a high-pressure, high-performance fixed displacement single vane pump specially developed by Yuken Kogyo Co., Ltd. of Japan for low-noise operation. This series covers an extremely wide flow range of 5.8~237 cm³/rev and adopts an internal chuck assembly structure, facilitating the maintenance and replacement of core components. It is widely used in industrial equipment such as injection molding machines, hydraulic presses, and bending machines.
II. Model Explanation
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Model Composition
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Meaning
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Optional Parameters
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PV2R1/PV2R2/PV2R3/PV2R4
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Series No.
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PV2R1 (Small Displacement), PV2R2 (Medium Displacement), PV2R3 (Large Displacement), PV2R4 (Extra-Large Displacement)
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-6/-8/-10/-41/-76, etc.
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Nominal Displacement (cm³/rev)
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Multiple specifications from 5.8~237 cm³/rev
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-L/-F
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Mounting Type
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L: Foot Mounting Type, F: Flange Mounting Type
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-R
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Rotation Direction
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R: Clockwise Direction (viewed from the shaft extension end), counterclockwise direction requires special customization
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-A
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Outlet Port Position
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A: Upper (standard), other positions can be customized
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-A
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Suction Port Position
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A: Upper (standard), other positions can be customized
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-43/-41/-31/-30
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Design No.
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Different series correspond to different design numbers
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Example: PV2R1-6-L-RAA-43 indicates a single vane pump of small displacement series, 6 cm³/rev displacement, foot mounting, clockwise rotation, upper inlet and outlet ports, and standard design number 43.
III. Core Technical Parameters
1. Basic Performance Parameters
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Series
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Displacement Range (cm³/rev)
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Maximum Working Pressure (MPa)
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Rated Pressure (MPa)
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Speed Range (r/min)
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Weight (kg)
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PV2R1
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5.8~31.0
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21
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16
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750~1800
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9.0(F)/11.2(L)
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PV2R2
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41.3~64.7
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21
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16
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600~1800
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15.5(F)/19.8(L)
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PV2R3
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76.4~115.6
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21
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16
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600~1800
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30.9(F)/40.9(L)
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PV2R4
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136.0~237.0
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17.5
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14
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600~1800
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68.5(F)/93.5(L)
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Note: When using phosphate ester fluid and water-containing hydraulic fluid, the maximum speed is limited to 1200 r/min.
2. Hydraulic Fluid Compatibility
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Fluid Type
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Applicable Pressure (MPa)
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Remarks
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Petroleum-based anti-wear oil
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21(PV2R1-3)/17.5(PV2R4)
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Recommended for use
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Petroleum-based ordinary oil
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16
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Pressure limited
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Anti-wear water-glycol fluid
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16
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Special seal required
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Ordinary water-glycol fluid
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7
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Pressure limited
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Water/oil emulsion
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7
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Pressure limited
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Phosphate ester fluid
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14
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Special seal required, add [F-] before the model
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3. Minimum Suction Pressure Requirements
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Model
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Speed < 1700 r/min
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Speed 1700~1800 r/min
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PV2R3-116
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20 kPa
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0 kPa
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PV2R4-237
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-20 kPa
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-13 kPa
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IV. Structural Features
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Low-noise Design: Adopts high-order equation stator curve to optimize vane movement trajectory, significantly reducing operating noise. The noise level is 45~70 dB (A) under test conditions.
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Chuck Assembly Structure: Core components (rotor, vane, stator, valve plate) are integrated into an integrally replaceable chuck assembly, enabling convenient maintenance and reducing downtime.
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High-pressure Performance: The maximum working pressure reaches 21 MPa (PV2R1-3), meeting the needs of most industrial hydraulic systems.
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Wide Flow Range: From 5.8 cm³/rev to 237 cm³/rev, covering small, medium, large and extra-large displacement requirements.
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Multiple Mounting Methods: Provides two mounting methods: foot mounting (Type L) and flange mounting (Type F), adapting to different equipment layouts.
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Optional Shaft Seal: Standard is nitrile rubber (NBR) seal; fluorine rubber (FKM) seal is optional when using phosphate ester fluid.
V. Performance Characteristics
1. Pressure-Flow Characteristics
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Test Conditions: Fluid viscosity 20 mm²/s (ISO VG32), oil temperature 50°C
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Flow changes linearly with speed and decreases slightly with increasing pressure (affected by volumetric efficiency)
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Typical Flow Examples:
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PV2R1-6: Approximately 10 L/min at 1800 r/min, approximately 5 L/min at 1000 r/min
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PV2R4-237: Approximately 420 L/min at 1800 r/min, approximately 220 L/min at 1000 r/min
2. Input Power Characteristics
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Power increases with pressure and speed, complying with the hydraulic pump power formula P=pq/(60η)
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Typical Power Examples:
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PV2R1-6: Approximately 3 kW at 21 MPa and 1800 r/min
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PV2R4-237: Approximately 70 kW at 17.5 MPa and 1800 r/min
3. Noise Characteristics
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Test Conditions: Fluid viscosity 20 mm²/s, measurement position 1 m behind the pump, background noise 40 dB (A)
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Small Displacement Model (PV2R1-6): Approximately 55 dB (A) at 1200 r/min and 21 MPa
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Extra-Large Displacement Model (PV2R4-237): Approximately 65 dB (A) at 1200 r/min and 17.5 MPa
VI. Installation and Maintenance Points
1. Installation Dimensions
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The interface dimensions and mounting hole positions of the flange mounting type (Type F) and foot mounting type (Type L) are different, see the official manual for details.
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Inlet and Outlet Specifications:
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PV2R1: Suction port φ25, outlet port φ15
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PV2R4: Suction port φ76, outlet port φ36
2. Installation Notes
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Ensure the coaxiality error between the pump shaft and the drive shaft is ≤0.1 mm, and the angle error is ≤0.5°.
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The suction pipeline should be short and thick, avoiding excessive elbows to reduce suction resistance.
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The suction port pressure should meet the minimum suction pressure requirement to avoid cavitation.
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The installation position should be convenient for maintenance and oil inspection.
3. Maintenance Points
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Regular Oil Change: It is recommended to change the oil every 2000~4000 hours, using hydraulic oil of the recommended viscosity grade.
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Filter Maintenance: Regularly inspect and clean the suction filter and return filter to keep the oil clean.
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Seal Inspection: Inspect the shaft seal and O-ring, and replace them in time if there is leakage.
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Chuck Assembly Replacement: When the pump has pressure drop, increased noise, or increased leakage, the chuck assembly can be replaced as a whole to restore the pump performance.
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Bearing Inspection: If abnormal vibration or noise occurs during operation, check the bearing wear and replace it in time.
VII. Application Fields
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Injection Molding Machines: PV2R1 (50~200T), PV2R2 (200~500T), PV2R3 (500~2000T), PV2R4 (≥2000T)
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Hydraulic Presses: Small (≤100 tons), Medium (100~500 tons), Large (500~2000 tons), Extra-Large (≥2000 tons)
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Bending Machines: Small (≤100 tons), Medium (100~300 tons), Large (300~600 tons)
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Other Industrial Equipment: Die-casting machines, rubber vulcanizing machines, CNC machine tools, construction machinery, etc.
VIII. Accessory Information
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Accessory Type
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Description
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Part Number Example
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Chuck Assembly
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Including core components such as rotor, vane, stator, and valve plate
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CPV2R1-6-R-43, CPV2R4-237-R-30
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Seals
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Shaft seals, O-rings, retaining rings, etc.
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ISD 26×42×8 (Oil Seal), OR NBR-90 G30-N (O-ring)
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Bearings
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Supporting the pump shaft, different models for different series
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6004 (PV2R1), 6209 (PV2R4)
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