KPM K3VL K3VL28 K3VL45 K3VL80 K3VL140 K3VL200 Series K3VL80/B-1BRKM-PO High Pressure Plunger Piston Pump

Iii. Product Features and Advantages
1. High efficiency and energy-saving feature
Load sensing control: Supply oil as needed, increase system efficiency by 20-30%, and reduce overflow loss
Pressure cut-off protection: Automatically unload when the system is overpressurized to prevent overload damage to the system
High efficiency: Volumetric efficiency ≥92%, total efficiency ≥85%, significantly more energy-efficient than ordinary gear pumps
Power matching: Automatically adjust the output according to the load to fully utilize the engine power
2. Reliability and durability
High-strength shell: Made of ductile iron or cast steel, with surface hardening treatment, it can withstand a continuous pressure of 35MPa
Wear-resistant design: Key friction pairs such as the plunger and cylinder block, sliding shoe and swash plate are made of special materials and undergo heat treatment (HRC58-62), ensuring a long service life
Anti-pollution capacity: Compared with other types of pumps, it has a better anti-pollution capacity and can adapt to harsh working environments
Mean time between failures: ≥ 12,000 hours, reducing maintenance frequency and downtime
3. Control performance advantages
Precise flow control: Achieve stepless flow regulation by changing the Angle of the swash plate, with a response time of less than 50ms
Compound control: Dual control of pressure cut-off and load sensing, featuring high system stability and safety
Low noise: Optimized fluid design, noise ≤78dB (A), improving the operating environment
Bidirectional rotation capability: It can be designed to rotate clockwise or counterclockwise to meet different installation requirements
Modular design: Control components can be replaced separately, making maintenance simple and reducing costs

Iv. Usage Functions and Purposes
Core functions
Convert mechanical energy into hydraulic energy to provide high-pressure oil power for the hydraulic system
Automatically adjust the output flow and pressure according to the system requirements to achieve precise control of the actuating elements
It works in conjunction with various control valves to achieve compound control of multiple actions of construction machinery
It has a pressure protection function to prevent system overload and enhance equipment safety
Main application fields
Hydraulic system for construction machinery
The power source for the working devices (boom, bucket arm, and bucket) and the rotating system of the excavator
Hydraulic drive for mobile machinery such as loaders, bulldozers and rollers
High-pressure oil sources for hydraulic breakers, hydraulic shears and other attachments
Industrial hydraulic system
Screw drive and clamping systems for plastic machinery (injection molding machines, extruders)
The power systems of forging and pressing equipment such as presses and bending machines
Hydraulic systems for metallurgical equipment and mining machinery
Specialized vehicles
The hydraulic systems of concrete pump trucks and truck cranes
Fire truck ladder lifting and telescopic system
The hydraulic lifting system of sanitation vehicles
Marine machinery
Deck machinery (such as anchor machines, winches)
Ship hydraulic steering gear system
Hydraulic system for Marine engineering equipment

V. Applicable Machines and Scenarios
1. Typical applicable machines
Excavator
The main pump of 7-8 ton excavators (such as Sany 75, XCMG 80, Lingong 75/80, etc.) provides the working device and rotary power
These models require a working pressure of approximately 25-30 mpa and a flow rate of about 120-150L/min, which perfectly matches the performance of the K3VL80
It is applicable to various working conditions such as excavation, loading and leveling, with frequent load changes but high requirements for system stability
Rotary drilling rig
As an auxiliary pump for Sany 280/360 and other rotary drilling RIGS, it provides power for auxiliary systems such as mast lifting and drill bit rotation
The pressure of the auxiliary system is generally between 20 and 25MPa, and the flow demand is relatively stable. The K3VL80 has high reliability and is suitable for long-term continuous operation
Other construction machinery
Small loader: Working device and steering system, pressure requirement approximately 20-28 mpa, flow requirement approximately 80-120L/min
Small road roller: Vibration system and walking drive, requiring the pump to be small in size and highly reliable
Forklift: Lifting, tilting and steering system, pressure requirement approximately 16-25 mpa, flow requirement approximately 60-100L/min
2. Characteristics of applicable scenarios
Working scenarios of construction machinery with frequent load changes:
During the excavation process of the excavator, the load changes suddenly, which requires the pump to respond quickly and control precisely
The load sensing control of K3VL80 can adjust the output in real time, maintain system stability and reduce pressure fluctuations
Applications with extremely high reliability requirements:
Aerial work platforms and offshore platform equipment
Once a malfunction occurs, it may cause serious consequences. The high reliability and long service life of K3VL80 ensure the safe operation of the system
Hydraulic systems requiring precise control:
Precision hydraulic presses, injection molding machines and other industrial equipment
High precision in flow and pressure control is required. The variable control of K3VL80 can meet the control accuracy requirement of ±2%
Mobile devices with high power density requirements
The pump is required to be small in size, light in weight but have a high output power. The K3VL80, weighing approximately 35 kilograms, can output about 45 kilowatts of power, with a high power density

Six. Similar models
1. Different specifications and models of the same series
K3VL45 Series
With a displacement of approximately 45cc/rev and a rated pressure of 32MPa, it is suitable for excavators and small construction machinery of 5 tons or less
It weighs approximately 25 kilograms and has a power output of about 30 kilowatts, making it suitable for small devices with limited space
K3VL112 Series
With a displacement of approximately 112cc/rev and a rated pressure of 30MPa, it is suitable for 10-15 ton excavators and medium-sized construction machinery
It weighs approximately 48 kilograms and has a power output of about 60 kilowatts, making it suitable for hydraulic systems that require large flow rates
K3VL140 Series
With a displacement of approximately 140cc/rev and a rated pressure of 28MPa, it is suitable for 15-20 ton excavators and large construction machinery
It weighs approximately 60 kilograms and has a power output of about 70 kilowatts, making it suitable for large hydraulic systems such as concrete pump trucks
2. Different series models of the same type
A10V Series (a certain brand)
Swashplate axial variable piston pump, displacement range from 28 to 140cc/rev
With a rated pressure of 35MPa, it has performance close to that of the K3VL series and is widely used in the field of construction machinery
The control methods are diverse and multiple compound control options can be provided
PV Series (a certain brand)
Radial piston pumps have a wide range of displacements, from 50 to 500cc/rev
The pressure can reach up to 30MPa, making it suitable for large-scale construction machinery and Marine machinery
The characteristics are strong anti-pollution ability and relatively low requirements for the cleanliness of the oil
K5V Series (a certain brand)
The high-performance swash plate axial variable piston pump is an upgraded version of the K3VL
The displacement range is larger (from 80 to 200cc/rev), and the rated pressure is 35MPa
Optimized design, higher efficiency, lower noise, and higher control accuracy, suitable for high-end construction machinery
3. Domestic similar products
Hengli A Series
Swash plate axial variable piston pump, displacement from 28 to 140cc/rev, rated pressure 32MPa
Its performance is comparable to that of the K3VL series, but it has a more competitive price and has been widely used in domestic construction machinery
It is an ideal alternative to the K3VL series and offers high cost performance
Eddie HD Series
Swashplate axial variable piston pump, adopting advanced manufacturing processes and materials
The key friction pairs are made of imported materials, featuring stable and reliable performance. Some models can directly replace the K3VL series
Its market share in the domestic construction machinery market has been increasing year by year

K3VL45/B-10RKM-L0
K3VL45/B-10RKM-P0/1-H1
K3VL45/B-10RMM-P0
K3VL45/B-10RSM-P0/1-E0
K3VL45/B-10RSM-P0
K3VL45/B-10RSS-P0
K3VL45/B-10RTM-P0
K3VL45/B-1ALSM-PM 24VDC
K3VL45/B-1ALSM-P0
K3VL45/B-1ALSS-L0/1-H4
K3VL45/B-1ARKM-P0/1-E0
K3VL45/B-1ARSM-P0/1-E0
K3VL45/B-1ARSM-P0
K3VL45/B-1ARSS-L1/1-H1
K3VL45/B-1BRSM-L0
K3VL45/B-1BBLSM-PM 24VDC
K3VL45/B-1BBLSM-P0/1-E0
K3VL45/B-1BBLSM-P0/1-H1
K3VL45/B-1BBLTM-P0
K3VL45/B-1BBRKM-P0
K3VL45/B-1BBRSM-P0/1-E0
K3VL45/B-1BBRSM-P0/1-H1
K3VL45/B-1BBRSS-L0
K3VL45/B-1BBRTM-P0
K3VL45/B-1NLSM-L0
K3VL60/B-1NRJM-PO
K3VL80/B-10RKM-PO
K3VL80/B-1NRKM-L0/1-H2
K3VL80/B-10RSM-L0
K3VL80/B-1CRMM-L0/1-H2
K3VL80/B-1NLSM-L0
K3VL80/BW-1NRJM-P0
K3VL80/BW-10RKM-P0
K3VL112/B-1NRSM-L0/1-H1
K3VL112/B-1CLWM-L0/1-H1
K3VL112/B-1CRWM-L0
K3VL112/B-1BBLSS-P0/1-H3
K3VL112/BW-10RKM-P0
K3VL140/B-1DRMM-L0/1-M2
K3VL140/B-1NRMM-L0/1-M2
K3VL140/B-10RMM-P0
K3VL140/B-1DLSM-L0/1-H3
K3VL140/BW-10RKM-P0
K3VL200/B-1CRKS-L0
K3VL200/B-1ELFM-L0/1-E0
K3VL200/B-1NRSS-L0/1-E0
K3VL200/B-1NRSS-L0/1-H1

K3V280DTH10ZR-5P09-V
K3V280DTH10ZL-5P09-V
K3VG280-10FRS-50M3
K3VG180-11NRS-0E00
K3VG180-10FRS-10MH2
K3VG280-10FRS-10MH4
K3V112DT-1V7R-1N29
K3V280DTH10ZR-5P09-V
K3V280DTH10ZL-5P09-V
K3VG280-10FRS-50M3
K3VG180-11NRS-0E00
K3VG180-10FRS-10MH2
K3VG280-10FRS-10MH4

K5V80DT K5V80DTP K5V80S K5V112DP
K5V140DP K5V140DT K5V140DTP K5V140S
K5V160DPH K5V200DP K5V200DPH K5V200DT
K5V200DTH K5V200DTP K5V200S K5V200SH

Vii. Precautions for Use
1. Installation points
Fixed foundation
The flatness of the installation plane should be ≤0.1mm to ensure the stability of the pump body and reduce vibration and noise
Tighten the fixing bolts evenly (with torque as per the specification requirements, approximately 60-80N · m) to prevent the shell from deforming
The pump and the prime mover should be connected by an elastic coupling. Rigid connection is strictly prohibited, and the coaxiality should be no more than 0.05mm
Oil port connection
The diameter of the oil inlet pipe should be no less than 32mm and the length no more than 3m to reduce oil suction resistance and prevent cavitation
The diameter of the oil outlet pipe should be ≥25mm to ensure that the pressure loss is within the allowable range
The oil drain pipe must be connected to the oil tank separately and not in parallel with the return oil pipe. The back pressure should be ≤0.3MPa to prevent damage to the oil seal
All pipelines must be thoroughly cleaned to ensure there are no iron filings, welding slag or other impurities. It is recommended to filter them with a 200-mesh filter screen
Control circuit connection
Electrical control lines should be laid separately from power lines to prevent interference
The wiring of the sensor and the solenoid valve should be firm to prevent loosening and control failure
Ensure good grounding to prevent electrical faults
2. Startup and Operation management
Startup program
Check the oil level in the fuel tank (more than 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 plug of the oil drain port, expel all the air inside the pump, and then tighten it
Start the system under no-load conditions (set the system relief valve to the minimum pressure) and run it for 5 to 10 minutes until the oil temperature rises above 30℃
Gradually increase the pressure (each increase ≤30% of the rated pressure, with an interval of ≥2 minutes). It is strictly prohibited to directly load the cold machine at full load
Key points of operation monitoring
Oil temperature: Normal 40-65℃, not exceeding 80℃ at the maximum. (If the temperature exceeds the limit, stop the machine to check the cooling system or the viscosity of the oil.
Pressure: Not exceeding the rated pressure (32MPa), peak value ≤35MPa and cumulative time ≤10 minutes per hour
Noise: Smooth operation ≤78dB. Abnormal noise (>82dB) indicates possible wear or cavitation, and the machine should be stopped immediately for inspection
Leakage: Normal allowable trace leakage (<5 drops per minute). If the leakage increases, the sealing parts should be inspected and repaired in time
Vibration: The vibration is slight to the touch. If obvious vibration is felt, the machine should be stopped to check the centering condition or bearing wear
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
Check the pressure difference of the filter. Replace the filter element in time if it exceeds the specified value
Regular maintenance
Every 250 hours:
When the pressure difference of the return oil filter exceeds 0.15MPa, the filter element must be replaced
Check whether the temperature distribution of the pump casing is uniform and determine if there is any abnormal wear inside
Every 500 hours:
Comprehensively inspect the seals and replace the aged or damaged sealing rings
Check the contamination level of the oil and take samples for testing if necessary
Every 1000 hours:
Change the hydraulic oil (while cleaning the oil tank and pipelines)
Check the pump shaft runout (should be ≤0.1mm) and radial runout (should be ≤0.05mm)
Every 2000 hours:
Disassemble and inspect the wear conditions of the plunger, cylinder block and distribution plate, and measure the fit clearance
Check for worn bearings and replace them if necessary
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 ≤-10℃), L-HV low-temperature hydraulic oil should be used to improve low-temperature fluidity
Regularly test the cleanliness of the oil to ensure compliance with ISO 4406 17/14 grade standards
When changing the oil, thoroughly clean the system to prevent the mixture of new and old oil from affecting performance
4. Special Precautions
It is strictly prohibited to operate without oil: Even a short period of dry running (>5 seconds) can cause the plunger and cylinder block to sinter, resulting in irreversible damage
Prevent cavitation
Make sure the oil suction pipe is well sealed to prevent air from entering the system
The oil suction height should be ≤500mm, and it is recommended to be ≤300mm to reduce the oil suction resistance
If the oil temperature is too low (<10℃), run it no-load for 10 to 15 minutes first to raise the oil temperature before loading
The pressure drop of the oil suction port filter is less than 0.03MPa to prevent cavitation caused by excessive oil suction resistance
Load matching
Avoid long-term operation at the maximum pressure and maximum speed simultaneously (which will cause overheating and excessive wear).
When designing the system, the pump should operate within the range of 70-85% of the rated pressure to increase its service life
Avoid frequent starts and stops to reduce shock loads
Shutdown protection
Before shutting down, the load should be unloaded to low pressure (≤50bar) and run for 3 to 5 minutes. Only when the oil temperature drops below 60℃ should the power be cut off
Before long-term shutdown, it should be run without load for 10 minutes to completely relieve the system pressure and prevent the oil from oxidizing
For long-term storage, all oil ports should be sealed to prevent dust and it should be placed in a dry and well-ventilated area