IPVAP IPCAP IPVP IPV IPVP IPC IPVS 3 4 5 6 7 Series IPC 5-64-101 High Pressure Hydraulic Internal Gear Oil Pump

I. Core Technical Parameters
Basic specifications
Type: Internal gear pump, “IPC” indicates the series code, “5” indicates the specification grade, “64” indicates the nominal displacement of 64 m³/h, “101” indicates the pressure grade of 101 bar (10.1 MPa)
Nominal displacement: 64 m³/h (1067 L/min), theoretical flow rate is directly proportional to rotational speed
Rated pressure: 101 bar (10.1 MPa), upper limit of continuous working pressure, short-term peak up to 120 bar
Rated speed: 1800 r/min. It is recommended to operate at full power. The maximum speed can reach 2000 r/min (for short-term operation)
Rotation direction: Right rotation (clockwise rotation when viewed from the shaft end), and a left rotation model is also available
Medium temperature: -10℃ to +60℃. The recommended working temperature is 20-50℃ to avoid a decrease in oil viscosity due to high temperatures
Weight: Approximately 45 kg (excluding accessories), compact structure, easy to install
Working parameters
Volumetric efficiency: ≥92% (under rated conditions), ensuring efficient energy conversion
Overall efficiency: ≥85%, with high comprehensive energy utilization efficiency
Applicable media: hydraulic oil, lubricating oil, fuel oil, etc. Viscosity range: 10-300 mm²/s, optimal working viscosity: 20-60 mm²/s
Noise level: <66 dB (DIN45 635 standard), smooth and quiet operation, improving the working environment
Oil cleanliness: ISO 4406 19/16 grade. It is recommended to install a 20μm filter at the oil inlet to protect the precision componentsIi. Working Principle
Working mechanism of internal gear pump
Core structure
It is composed of a pump body, an internal gear (driving wheel), an external gear (driven wheel), a crescent-shaped diaphragm and a transmission shaft
The internal gear and the external gear form two sealed chambers inside the pump body, which are separated by crescent plates
The internal gear has one more tooth than the external gear to ensure good meshing and sealing
Oil absorption process
When the transmission shaft drives the internal gear to rotate, the internal gear and the external gear gradually disengage on the oil suction side
The increase in the volume between the teeth creates a local vacuum (negative pressure), and the liquid in the oil tank is sucked into the pump chamber under the action of atmospheric pressure
The liquid fills the gaps between the teeth and moves towards the oil discharge side as the gear rotates
Oil discharge process
When the gear rotates to the oil discharge side, the internal gear and the external gear gradually engage
The volume between the teeth decreases, and the liquid is squeezed out of the pump body through the oil discharge port, forming a continuous and stable liquid flow
The oil discharge pressure depends on the system load and can reach up to the rated pressure of 101 bar at most
Flow control
The output flow rate is directly proportional to the rotational speed and can be precisely controlled by changing the driving speed
The internal meshing structure reduces flow pulsation and provides a more stable output, making it suitable for applications with high requirements for flow stability

Iii. Product Features and Advantages
1. Excellent fluid adaptability
High-viscosity medium conveying capacity: It is particularly suitable for conveying liquids with a viscosity range of 10-300 mm²/s, and can even handle high-viscosity fluids up to 1000 mm²/s
Compatibility with media containing fine particles: Compared with other types of pumps, internal gear pumps are less sensitive to oil contamination and have a longer service life
Bidirectional conveying capacity: The liquid can flow in both directions by changing the rotation direction, simplifying the system design
2. Stable and efficient working performance
Low-noise operation (<66 dB) : Optimized gear design and precise manufacturing significantly reduce working noise and improve the operating environment
High volumetric efficiency (≥92%) : Advanced axial and radial clearance compensation design ensures high volumetric efficiency even under low pressure and low viscosity conditions
Flow stability: The internal meshing structure reduces flow pulsation, resulting in small output fluctuations and making it suitable for precision control applications
Strong self-priming ability: It can be started without additional pump priming, and the suction lift can reach 5 meters (depending on the viscosity of the medium)
3. Structural and maintenance advantages
Simple and reliable design: Only two main moving parts (internal gear and external gear), low failure rate, and easy maintenance
Compact and lightweight: Under the same flow rate, its volume is approximately 30% smaller than that of an external gear pump, making it lightweight and saving installation space
Multiple sealing options: Different material seals can be selected based on the characteristics of the medium to enhance adaptability and reliability
Long service life: Made of wear-resistant materials and with precise manufacturing processes, the average mean time between failures exceeds 8,000 hours

Iv. Usage Functions and Purposes
Core functions
Convert mechanical energy into hydraulic energy to provide a stable high-pressure oil source for the hydraulic system
Precisely control the flow and direction of liquid transportation to ensure the smooth operation of the actuator
In the industrial field, it serves as a transfer pump to move liquids from one place to another while providing the necessary pressure
Main application fields
Industrial hydraulic system
Injection molding machine: Provides stable pressure (up to 101 bar) for the clamping system to ensure tight mold closure and prevent flash on injection molded parts
Hydraulic press: Precisely control the working pressure to achieve processes such as metal forming and pressing
Machine tool hydraulic system: It provides power for the movement of the worktable and the feed system, ensuring processing accuracy
Lubrication system
Centralized lubrication for large-scale mechanical equipment: Providing a fixed amount of lubricating oil for bearings, gearboxes, etc., to extend the service life of the equipment
Wind turbine generator set: Provides hydraulic power and lubrication for yaw and pitch systems to ensure reliable operation of the equipment
Fluid transportation
Petrochemical industry: Conveying lubricating oil, crude oil, chemical raw materials, etc., suitable for media of different viscosities and corrosiveness
Food processing: Conveying high-viscosity food raw materials such as edible oil and syrup to meet hygiene standards
Marine machinery: Provides power for hydraulic steering gears, anchor winches, winches, etc., and ADAPTS to harsh Marine conditions
Auxiliary system for construction machinery
Excavators and loaders: Provide a stable low-pressure oil source for the pilot control system to achieve precise operation
Roller: Provides auxiliary hydraulic power for the vibration system and walking drive, improving operation efficiency

V. Applicable Machines and Scenarios
1. Typical applicable machines
Injection molding equipment
The 1067 L/min flow rate and 101 bar pressure provided by IPC 5-64-101 meet the requirements of mold closing and injection systems for small and medium-sized injection molding machines
Stable flow output ensures uniform mold closure and prevents defects such as flash and deformation in plastic products
In coordination with the injection molding machine control system, multi-level pressure and flow control are achieved to enhance product quality and production efficiency
Hydraulic presses and metal forming equipment
It provides a stable high-pressure oil source for processes such as pressing, bending and stamping to ensure processing accuracy and product consistency
Maintain a stable pressure during the pressure-holding stage to prevent the workpiece from bouncing back and improve the forming quality
The low-noise feature improves the working environment in the workshop and reduces the fatigue of the operators
Large-scale industrial lubrication system
It is used as a centralized lubrication pump in large-scale equipment in industries such as papermaking, steel, and cement
Accurately measure and deliver lubricating oil to each lubrication point to extend the service life of equipment components
Integrated with the intelligent control system, it enables on-demand lubrication and saves lubricant consumption
2. Characteristics of applicable scenarios
Precision processing environment requiring low-noise operation
In places with strict requirements for environmental noise, such as the manufacturing of electronic equipment and the processing of optical instruments, the characteristic of noise < 66 dB is particularly important
The process flow for transporting high-viscosity liquids:
In oil processing, cosmetic production, asphalt transportation, etc., the internal meshing structure can effectively prevent the sliding of high-viscosity media and ensure the transportation efficiency
Hydraulic control system with stable flow requirements:
The precision positioning system, synchronous motion control, etc., the low pulsation characteristic of the internal gear pump ensures the smooth movement of the actuator and precise positioning
Space-constrained equipment installation environment
Marine deck machinery, aviation equipment, mobile construction machinery, etc., with compact structures and lightweight designs, are easy to install and maintain

Six. Similar models
1. Different specifications and models of the same series
IPC 5-40-101: Displacement 40 m³/h, suitable for small injection molding machines and hydraulic systems, flow rate approximately 667 L/min, lighter weight (about 40 kg), suitable for occasions with high requirements for space and weight
IPC 5-80-101: Displacement 80 m³/h, suitable for medium-sized hydraulic presses and large injection molding machines, flow rate approximately 1333 L/min, with greater output power, suitable for heavy-duty working conditions requiring large flow rates
IPC 6-64-101: With a higher specification grade, it adopts heavier bearings and seals, is suitable for continuous high-load operation, has a longer service life, and is applicable to industrial systems that operate continuously for 24 hours
2. Different series models of the same type
IPVS 5-64-101: Internal gear pumps of the same brand, with similar structures, but the IPVS series is specifically designed for variable systems. The flow rate can be adjusted within a certain range, making it suitable for application scenarios that require flow rate variations
IPH 5-64-101: High-pressure series of the same brand, with a maximum working pressure of up to 250 bar, suitable for industrial applications requiring higher pressure, such as high-pressure hydraulic systems and metal forming
EIPC 5-64: Another series of internal gear pumps from a different brand, featuring a distinct bearing design and sealing technology, offers slightly higher efficiency and better noise control under high-speed and light-load conditions
3. Domestic similar products
CBG series: Internal gear pumps produced by well-known domestic brands, with a displacement range of 16-100 m³/h and a rated pressure of 63-250 bar. They have a significant price advantage and are widely used in the domestic market
YBC series: Domestic high-performance internal gear pumps, using new materials and manufacturing processes, have been improved in terms of anti-pollution and durability. Some models can directly replace imported products

Vii. Precautions for Use
1. Installation points
Fixed foundation
The installation plane should be flat (flatness < 0.1mm) to prevent the pump body from deforming and affecting the gear meshing and sealing performance
The fixing bolts should be tightened evenly (to the specified torque) to prevent uneven force on the shell and leakage
Pipeline connection
The diameter of the oil inlet pipe should be no less than 50mm and the length less than 2m to reduce oil suction resistance and prevent cavitation
The diameter of the oil outlet pipe should be ≥40mm, and ensure that the pressure loss is within the allowable range (<5 bar).
The oil suction pipe must be well sealed to prevent air from entering the system and forming bubbles, which may affect the performance and service life of the pump
Shaft connection
Elastic couplings (such as membrane couplings) must be used, and rigid connections are strictly prohibited
Coaxiality error is less than 0.05mm, angular deviation is less than 0.5°, reducing vibration and bearing load
Regularly inspect the wear of the coupling and replace it in time to prevent the connection from loosening and damaging the pump shaft
2. Startup and Operation management
Startup program
Check the oil level in the fuel tank (at least 200mm above the suction port) and the oil temperature (not lower than 10℃).
Manually turn the wheel 2 to 3 times to ensure there is no jamming
Loosen the exhaust plug, start the pump to fill the pump cavity with oil until continuous oil is discharged, then tighten it
Start the system without load (set the system relief valve to the minimum pressure) and run it for 3 to 5 minutes
Gradually increase the pressure (each time ≤30% of the rated pressure, with an interval of ≥2 minutes). It is strictly prohibited to directly load the cold machine to full load
Operation monitoring
Oil temperature: Normal operating temperature is 20-60℃. If the temperature exceeds 70℃, the machine should be shut down to check the cooling system or the viscosity of the oil
Pressure: Not exceeding the rated value (101 bar), peak not exceeding 120 bar and cumulative time < 10 minutes per hour
Noise: Smooth operation <66 dB. Abnormal noise (>70 dB) indicates possible wear or cavitation, and the machine should be stopped immediately for inspection
Leakage: Slight seepage (<3 drops per minute) is allowed. If the leakage increases, timely maintenance is required to prevent oil contamination and a drop in system pressure
3. Maintenance and care
Daily inspection
Check the oil level, temperature, noise and leakage conditions every shift, and record the operating parameters
Check if the connecting bolts are loose and tighten them in time
Clean the surface of the pump body to prevent the accumulation of oil stains from affecting heat dissipation and observation
Regular maintenance
Every 250 hours: Check the pressure difference of the filter (<0.15MPa), and replace the filter element if necessary
Every 500 hours: Check the contamination level of the oil (≤ISO 4406 19/16 grade), and take samples for testing if necessary
Every 1000 hours: Change the hydraulic oil and clean the oil tank and filter at the same time
Every 2000 hours: Conduct a comprehensive disassembly inspection, measure the gear meshing clearance, and replace worn parts (such as seals and bearings)
Oil Product management
Hydraulic oils of different brands must not be mixed to prevent the reaction of additives and the formation of sediment
In cold regions (ambient temperature < 0℃), low-viscosity hydraulic oil (such as L-HV series) should be used.
Regularly test the viscosity and acid value of the oil to ensure they meet the usage requirements and extend its service life
4. Special Precautions
Prevent dry running
It is strictly prohibited to start the pump without oil. Even a short period of dry operation can cause severe wear and even jamming of the gears and the pump body
After a long period of inactivity, when restarting the pump, clean hydraulic oil should be filled into it to ensure that all friction pairs are fully lubricated
Prevent cavitation
Ensure that the oil suction pipeline is well sealed to prevent air from entering the system
The oil suction height should be less than 500mm, and it is recommended to be less than 300mm to reduce the oil suction resistance
When the oil temperature is too low (<10℃), run it no-load for 15 minutes first to increase the oil temperature before loading to reduce the risk of cavitation
Shutdown protection
Before shutting down, the load should be unloaded to low pressure (<20 bar) and run for 3 to 5 minutes. Only when the oil temperature drops below 60℃ should the power be cut off
When the pump is not in use for a long time, the oil in it should be drained or filled with anti-rust oil to prevent internal rusting