TOP-10A TOP-11A TOP-12A TOP-13A NOP Trochoid Gear Pump 0.5MPa

Product Overview

The NOP (Nippon Oil Pump) TOP Series is a small-capacity trochoid gear pump featuring decades-proven trochoid gear technology that delivers compact size, light weight, low noise, and extended service life.

The TOP Series covers four base models: TOP-10A, TOP-11A, TOP-12A, and TOP-13A, with theoretical displacements ranging from 0.8 cm³/rev to 4.5 cm³/rev, ideal for low-pressure continuous or intermittent lubrication system applications. The series also includes motor-integrated models such as TOP-2MY1500-210HBMVB and TOP-2MY1500-212HBM, which combine motor and pump in a single unit for simplified installation.

As a premium aftermarket alternative to original NOP TOP Series trochoid gear pumps, this product is manufactured to strict NOP OEM specifications, ensuring 100% interchangeability with original equipment—direct bolt-on replacement with zero modification required. Every pump undergoes 100% simulated load testing prior to shipment to verify performance and reliability under rated operating conditions.

Technical Specifications 

TOP-10A Series Pump Head

• Product Series: NOP TOP Series Trochoid Gear Pump

• Theoretical Displacement: 0.8 cm³/rev

• Theoretical Flow (@1500 rpm): 1.2 L/min

• Theoretical Flow (@1800 rpm): 1.4 L/min

• Maximum Operating Pressure: 0.5 MPa

• Maximum Speed: 3000 rpm

• Approx. Weight: 0.5 kg (w/o relief valve) / 0.8 kg (w/ relief valve)

• Permissible Fluid Viscosity: 10 – 500 mm²/sec

• Permissible Fluid Temperature: -5～80°C (High-temp spec available)

• Standard Rotation: Left rotation (viewed from shaft end)

• Relief Valve: Optional (VB type)

• Design Type: Trochoid gear

TOP-11A Series Pump Head

• Product Series: NOP TOP Series Trochoid Gear Pump

• Theoretical Displacement: 1.5 cm³/rev

• Theoretical Flow (@1500 rpm): 2.2 L/min

• Theoretical Flow (@1800 rpm): 2.7 L/min

• Maximum Operating Pressure: 0.5 MPa

• Maximum Speed: 2000 rpm

• Approx. Weight: 0.5 kg (w/o relief valve) / 0.8 kg (w/ relief valve)

• Permissible Fluid Viscosity: 10 – 500 mm²/sec

• Permissible Fluid Temperature: -5～80°C (High-temp spec available)

• Standard Rotation: Left rotation (viewed from shaft end)

• Relief Valve: Optional (VB type)

• Design Type: Trochoid gear

TOP-12A Series Pump Head

• Product Series: NOP TOP Series Trochoid Gear Pump

• Theoretical Displacement: 2.5 cm³/rev

• Theoretical Flow (@1500 rpm): 3.7 L/min

• Theoretical Flow (@1800 rpm): 4.5 L/min

• Maximum Operating Pressure: 0.5 MPa

• Maximum Speed: 1800 rpm

• Approx. Weight: 0.6 kg (w/o relief valve) / 0.9 kg (w/ relief valve)

• Permissible Fluid Viscosity: 10 – 500 mm²/sec

• Permissible Fluid Temperature: -5～80°C (High-temp spec available)

• Standard Rotation: Left rotation (viewed from shaft end)

• Relief Valve: Optional (VB type)

• Design Type: Trochoid gear

TOP-13A Series Pump Head

• Product Series: NOP TOP Series Trochoid Gear Pump

• Theoretical Displacement: 4.5 cm³/rev

• Theoretical Flow (@1500 rpm): 6.7 L/min

• Theoretical Flow (@1800 rpm): 8.1 L/min

• Maximum Operating Pressure: 0.5 MPa

• Maximum Speed: 1800 rpm

• Approx. Weight: 0.8 kg (w/o relief valve) / 1.1 kg (w/ relief valve)

• Permissible Fluid Viscosity: 10 – 500 mm²/sec

• Permissible Fluid Temperature: -5～80°C (High-temp spec available)

• Standard Rotation: Left rotation (viewed from shaft end)

• Relief Valve: Optional (VB type)

• Design Type: Trochoid gear

TOP-2MY1500-210HBMVB / TOP-2MY1500-212HBM (Motor-Integrated Type)

• Product Series: NOP 2MY Series Motor-Integrated Trochoid Gear Pump

• Displacement Range: Small to medium flow (10-20 cm³/rev range)

• Maximum Discharge Pressure: 1.2 – 2.0 MPa (model dependent)

• Motor Power: 1500W

• Voltage: 200V / 220V / 380V

• Operating Temperature Range: -5～80°C

• Applicable Fluids: Hydraulic oil, lubricating oil, coolant

• Permissible Fluid Viscosity: 10 – 500 mm²/sec

• Design Type: Trochoid gear, motor-integrated

• Special Configuration: With relief valve (VB type)

• Typical Applications: Machine tool lubrication, cutting fluid delivery

Key Technical Advantages

1. Proven Trochoid Gear Technology
The TOP Series utilizes NOP’s decades-proven trochoid gear technology, with precision meshing between inner and outer rotors for efficient, stable fluid delivery. This design delivers excellent volumetric efficiency within a compact footprint, ideal for low-pressure lubrication and coolant delivery applications.

2. 100% Interchangeable Design
All models are manufactured to strict NOP mounting interface standards, enabling bolt-for-bolt direct replacement of original equipment. The TOP-10A, TOP-11A, TOP-12A, and TOP-13A share identical mounting interfaces—only displacement differs, allowing flexible interchangeability on the same mounting. No modifications or adapters are required, significantly reducing equipment downtime and retrofit costs.

3. Compact & Lightweight Design
TOP Series pump heads weigh only 0.5-0.8 kg (without relief valve)—industry-leading in this displacement class. The compact footprint enables easy integration into space-constrained equipment such as machine tools, textile machinery, and printing machinery. The motor-integrated 2MY Series further simplifies system integration.

4. Low Noise & Extended Service Life
The rolling engagement characteristics of trochoid gears make the TOP Series exceptionally quiet in operation. Critical friction surfaces undergo surface treatment for extended service life. Additionally, the TOP Series supports selectable rotation direction (clockwise/counterclockwise) for flexible system configuration.

5. Optional Relief Valve & Broad Fluid Compatibility
The TOP Series offers an optional internal relief valve (VB type) for system overload protection. Permissible fluid viscosity ranges from 10 to 500 mm²/sec, with fluid temperature from -5 to 80°C, compatible with hydraulic oil, lubricating oil, coolant, and various other media.

Application Areas

• Machine Tool Lubrication Systems: CNC machines, lathes, milling machines—centralized lubrication and coolant delivery

• Textile Machinery: Looms, spinning machines—lubricant pumps

• Printing Machinery: Dampening solution and lubricant supply for printing equipment

• Light Industrial Machinery: Packaging equipment, food machinery—lubrication systems

• Cutting Fluid Systems: Water-soluble and oil-based cutting fluid circulation

• Hydraulic Operating Systems: Low-pressure hydraulic circuit power sources

• Specialty Vehicles: Onboard lubrication systems

Expert Maintenance Tips

Installation Guidelines:

1. Model Verification: Before installation, verify the pump model and physical dimensions on the original equipment. TOP-10A, TOP-11A, TOP-12A, and TOP-13A share identical mounting interfaces but differ in displacement and flow rate—select the correct model based on system flow requirements. For 2MY Series motor-integrated models, confirm displacement specification (210HBMVB = 10 cm³/rev, 212HBM = 12 cm³/rev).

2. Rotation Direction Confirmation: TOP Series standard configuration is left rotation (viewed from shaft end). Confirm that the system-required rotation direction matches the pump configuration. NOP offers both clockwise and counterclockwise rotation options.

3. Fluid Cleanliness: Maintain system fluid cleanliness to ISO 4406 standards. Trochoid pumps are sensitive to internal clearance—contaminants in the fluid may cause rotor seizure or abnormal wear.

4. Suction Line Requirements: Ensure the suction line is unobstructed and air-free. The suction line should be as short and straight as possible, with sealed connections.

5. Mounting Bolt Torque: Mounting bolts must be torqued to NOP-specified values and re-torqued after initial operation.

Routine Maintenance:

1. Leak Inspection: Regularly inspect pump body and shaft seal areas for oil seepage. Replace seals immediately if leakage is detected.

2. Fluid Change Interval: Replace hydraulic oil or lubricating oil periodically based on system operating conditions to prevent performance degradation from aged fluid.

3. Operating Noise Monitoring: The TOP Series is renowned for low noise operation. If abnormal noise increase is detected, shut down immediately for inspection to identify potential rotor wear or bearing damage.

4. Relief Valve Function Check: For models equipped with relief valve (VB type), periodically verify the relief valve set pressure to ensure reliable overload protection.