VV16-R-A-20 VV16-R-Y-B-10 Tokyo Keiki Vane Pump 16 MPa

Product Overview

The VV16-R-A-20 and VV16-R-Y-B-10 are the core models within the Tokyo Keiki (formerly TOKIMEC) VV16 series of single-acting pressure-compensated variable displacement vane pumps. The VV16 series is designed with the goal of manufacturing more convenient hydraulic equipment, pursuing large capacity, low noise, energy saving, and environmental protection while developing power control technology to meet modern industrial demands. The series employs a pressure-compensated variable displacement design where the stator eccentricity automatically changes displacement — reducing output flow as load increases — with a built-in relief pressure limiting mechanism that eliminates the need for an external relief valve.

About the VV16 Series: The Tokyo Keiki VV16 series product line encompasses both variable displacement vane pumps and variable displacement piston pumps. The VV16-R-A-20 and VV16-R-Y-B-10 belong to the variable displacement vane pump category within the VV16 series, featuring a single-acting pressure-compensated variable structure. The series is widely used in hydraulic systems for plastic injection molding machines, machine tools, construction machinery, reservoir gates, and movable bridges at ferry terminals.

Model Code Breakdown (for procurement and engineering reference):

• VV16: Tokyo Keiki VV16 series variable displacement vane pump

• -R: Right-hand rotation (clockwise, viewed from shaft end)

• -A / -Y: Shaft type. A = splined shaft; Y = keyed shaft

• -20 / -B-10: Port type and design variant codes. A-20 corresponds to pipe threaded ports with splined shaft; Y-B-10 corresponds to plate mounting ports with keyed shaft

• N5.5: Additional specification code

Drop-in Replacement Advantage: Manufactured to exact Tokyo Keiki OEM specifications, these pumps achieve complete drop-in interchangeability with the original VV16 series for mounting flange, shaft dimensions, port layout, and pressure compensator control interface. Every pump undergoes 100% simulated load testing prior to shipment, validating pressure compensator response, volumetric efficiency, and thermal stability under conditions replicating real-world duty cycles.

Technical Specifications 

Model VV16-R-A-20:

• Model Code: VV16-R-A-20

• Series: Tokyo Keiki VV16 Series (Variable Displacement Vane Pump)

• Geometric Displacement: 16 mL/r

• Rated Pressure: 16 MPa (160 bar), short-time overload up to 21 MPa

• Maximum Pressure: 21 MPa (210 bar)

• Speed Range: 600–3000 r/min, optimum efficiency range 1000–2500 r/min

• Theoretical Flow at 1500 rpm: Approx. 24 L/min

• Volumetric Efficiency: ≥92% (standard conditions)

• Control Type: Pressure Compensated Variable (Single-Acting)

• Rotation: Right-hand (clockwise, viewed from shaft end)

• Shaft Type: Splined shaft

• Port Type: Pipe threaded ports

• Drive Method: Shaft-end direct-coupled to motor or engine

• Working Fluid: Mineral-based hydraulic oil (ISO VG32/46, viscosity 10–400 mm²/s recommended)

• Operating Temperature: -20°C to +80°C (continuous), short-time up to 120°C

• Weight: Approx. 8.5 kg

Model VV16-R-Y-B-10:

• Model Code: VV16-R-Y-B-10

• Series: Tokyo Keiki VV16 Series (Variable Displacement Vane Pump)

• Geometric Displacement: 16 mL/r

• Rated Pressure: 16 MPa (160 bar), short-time overload up to 21 MPa

• Maximum Pressure: 21 MPa (210 bar)

• Speed Range: 600–3000 r/min, optimum efficiency range 1000–2500 r/min

• Theoretical Flow at 1500 rpm: Approx. 24 L/min

• Volumetric Efficiency: ≥92% (standard conditions)

• Control Type: Pressure Compensated Variable (Single-Acting)

• Rotation: Right-hand (clockwise, viewed from shaft end)

• Shaft Type: Keyed shaft

• Port Type: Plate mounting ports

• Drive Method: Shaft-end direct-coupled to motor or engine

• Working Fluid: Mineral-based hydraulic oil (ISO VG32/46, viscosity 10–400 mm²/s recommended)

• Operating Temperature: -20°C to +80°C (continuous), short-time up to 120°C

• Weight: Approx. 8.5 kg

VV16 Series Model Configuration Reference:

• VV16-R-A-20: Pipe threaded ports + splined shaft, suitable for pipe connection scenarios

• VV16-R-Y-B-10: Plate mounting ports + keyed shaft, suitable for integrated hydraulic power units

• VV16-R-B-10: Plate mounting ports + keyed shaft (standard type)

• VV16-R-BL-10: Plate mounting ports + keyed shaft (BL spring configuration)

• VV16-R-A-10: Pipe threaded ports + splined shaft (10 series design)

Key Technical Advantages

1. Pressure Compensated Variable Control with Automatic Energy Saving
The VV16 series employs a single-acting pressure-compensated variable design where stator eccentricity automatically changes displacement. As system load increases, the pump automatically reduces output flow, maintaining only leakage compensation flow to minimize system heat generation and power loss. The design incorporates a built-in relief pressure limiting mechanism, eliminating the need for an external relief valve — simplifying the piping system and improving working conditions. The pressure compensator’s response time and overshoot are optimized to ensure stable and precise system pressure control.

2. Low Noise Operation with Pulsation Suppression Structure
The VV16 variable vane pump features a low operating noise pulsation suppression structure, suitable for machine tool applications with strict noise control requirements. The series employs low-friction lead-free bearings that not only improve energy efficiency and product life but also serve environmental purposes. Optimized stator curve design and flow passage layout effectively suppress fluid-borne noise propagation.

3. Compact Lightweight Design with High Power Density
The VV16 series features compact dimensions that facilitate machine miniaturization. With a displacement of 16 mL/r, the total pump mass is only approximately 8.5 kg, leading its displacement class in power density. The compact axial dimensions make the VV16 series particularly suitable for space-constrained industrial hydraulic applications.

4. Dual-Purpose Configuration (Pump/Motor)
The VV16 series vane motor uses a switching valve that easily enables switching between low-speed/high-torque and high-speed/low-torque operation, with automatic selection of speed and torque over a wide range. This characteristic allows the VV16 series to serve not only as a hydraulic pump but also as a hydraulic motor in applications requiring variable speed and torque.

5. High-Quality Materials with Wide Fluid Compatibility
The pump body is constructed from high-strength cast iron with precisely ground internal clearances. Sealing utilizes hard alloy mechanical seals for durability. Working fluid compatibility includes mineral-based hydraulic oils (ISO VG32/46) with a recommended viscosity range of 10–400 mm²/s and an operating temperature range of -20°C to +80°C, short-time up to 120°C.

6. Built-in Relief Pressure Limiting with System Simplification
The VV16 series features a built-in relief pressure limiting mechanism, eliminating the need for an external relief valve. The discharge line requires no safety valve, and the suction line requires no foot valve, simplifying the piping system and improving working conditions. This integrated design reduces system complexity and installation costs, particularly suitable for small CNC lathes, grinders, and automated fixture energy-saving hydraulic stations.

Application Areas

• Plastic Injection Molding Machines: Clamp and injection hydraulic systems (the VV16 series is widely used in the injection molding industry)

• Machine Tools: Small CNC lathes, grinders, special-purpose machine tool hydraulic systems, automated fixture energy-saving hydraulic stations

• Construction Machinery: Construction machinery hydraulic drive circuits

• Water Conservancy Engineering: Reservoir gate hydraulic systems, movable bridge hydraulic drives at ferry terminals

• Marine & Offshore: Marine hydraulic systems (widely used in hydraulic manufacturing for petroleum, chemical, marine, and power industries)

• Gaming Equipment: Gaming machine hydraulic drive systems

• General Industrial Hydraulic Power Units: Small to medium hydraulic power units, central oil supply systems

Expert Maintenance Tips

1. Hydraulic Fluid Cleanliness
The VV16 series pressure-compensated variable mechanism operates with tight clearances and is sensitive to particulate contamination. System fluid cleanliness must meet ISO 4406 18/15/12 or better. Recommended fluids are ISO VG32 or VG46 mineral-based hydraulic oils with a viscosity range of 10–400 mm²/s. Install a 10 μm absolute-rated filter element at the pump inlet. Replace elements at 500 hours after first commissioning, then every 1,000 operating hours or 6 months, whichever comes first.

2. Installation Alignment and Port Selection
Ensure drive shaft alignment during installation, employing a flexible coupling. The VV16-R-A-20 features pipe threaded ports with splined shaft, suitable for direct drive or pipe connection scenarios; the VV16-R-Y-B-10 features plate mounting ports with keyed shaft, suitable for integrated hydraulic power units. Position the filling port upwards during installation and maintain permissible suction pressure at the pump inlet.

3. Pressure Compensator Setting and Adjustment
Set the VV16 series pressure compensator 15–20 bar above the maximum working load pressure, never exceeding the 16 MPa rated pressure. Adjust only with the system at zero load. Rotate the adjustment screw slowly and verify stable pressure gauge readings before proceeding. Never adjust the compensator while the system is under pressure. Note: The pressure compensator is not a safeguard against pressure overload. A pressure relief valve must be installed in the system (for models not equipped with built-in relief pressure limiting mechanism).

4. Pre-Start Priming and Air Bleeding
Before first start, fill the pump housing with clean hydraulic fluid. If the pump is mounted above the fluid level, fill through the outlet port; if mounted below the fluid level, loosen the outlet fitting to allow fluid to displace air. Position controls at neutral (zero displacement) and run at low speed for approximately 5 minutes, confirming air is fully expelled before applying load.

5. Operating Temperature and Viscosity Control
The VV16 series operating temperature range is -20°C to +80°C (continuous), with short-time tolerance up to 120°C. Recommended fluids are ISO VG32 or VG46 anti-wear hydraulic oils with a viscosity range of 10–400 mm²/s. For continuous high-temperature applications, select a higher viscosity grade hydraulic oil or install an oil cooler.