Shandong Keystone Hydraulic Co.,Ltd
| Payment Terms | T/T |
| Supply Ability | 5,000 units per month |
| Delivery Time | 7 work days |
| Packaging Details | Wooden boxes and cartons |
| Application | Other,Metering,oil,Sewage,hydraulic jack etc |
| Pressure | High Pressure,Low Pressure,25MPa,less than 44mpa |
| Structure | Piston Pump,Single-stage Pump,Diaphragm Pump,Gear Pump,Vane Pump |
| Power | Hydraulic,Electric,Pneumatic,7.5KW to 75KW,Other |
| Fuel | Diesel,electric,hydraulic oil,Other,standard 380V 50Hz 3phase |
| Theory | Rotary Pump,Centrifugal Pump,Reciprocating Pump,Electromagnetic Pump,Other |
| Standard or nonstandard | Standard |
| Warranty | 1 Year,12 Months |
| Material | Steel,Aluminum Alloy,Cast Iron,Casting Iron,304SS |
| Type | hydraulic gear pump,electric water pump,Rotary,high pressure jet grouting pumps,diesel pump |
| Product name | High pressure micro hydraulic pumps for logsplitter,hydraulic diaphragm metering pump,Model High Pressure Hydraulic Manual Pumps,High pressure hydraulic hand pumps,Compression machine |
| Color | black，blue |
| Voltage | 380V,220v/50hz,415V,etc are all available,220V |
| Oil capacity | 2200 ml,2.2L,901ml |
| Feature | High Efficiency,Long Life,Waste water treatment for house septic tank or flood,Low Noise |
| Brand Name | KERSTERN |
| Model Number | A4VG90 |
| Certification | SIO9001 |
| Place of Origin | China |
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Product Specification
| Payment Terms | T/T | Supply Ability | 5,000 units per month |
| Delivery Time | 7 work days | Packaging Details | Wooden boxes and cartons |
| Application | Other,Metering,oil,Sewage,hydraulic jack etc | Pressure | High Pressure,Low Pressure,25MPa,less than 44mpa |
| Structure | Piston Pump,Single-stage Pump,Diaphragm Pump,Gear Pump,Vane Pump | Power | Hydraulic,Electric,Pneumatic,7.5KW to 75KW,Other |
| Fuel | Diesel,electric,hydraulic oil,Other,standard 380V 50Hz 3phase | Theory | Rotary Pump,Centrifugal Pump,Reciprocating Pump,Electromagnetic Pump,Other |
| Standard or nonstandard | Standard | Warranty | 1 Year,12 Months |
| Material | Steel,Aluminum Alloy,Cast Iron,Casting Iron,304SS | Type | hydraulic gear pump,electric water pump,Rotary,high pressure jet grouting pumps,diesel pump |
| Product name | High pressure micro hydraulic pumps for logsplitter,hydraulic diaphragm metering pump,Model High Pressure Hydraulic Manual Pumps,High pressure hydraulic hand pumps,Compression machine | Color | black，blue |
| Voltage | 380V,220v/50hz,415V,etc are all available,220V | Oil capacity | 2200 ml,2.2L,901ml |
| Feature | High Efficiency,Long Life,Waste water treatment for house septic tank or flood,Low Noise | Brand Name | KERSTERN |
| Model Number | A4VG90 | Certification | SIO9001 |
| Place of Origin | China | ||
| High Light | 3000rpm High Pressure Hydraulic Pump ，Railway Construction Machinery High Pressure Hydraulic Pump ，A4VG90EP3 axial displacement pump | ||
The A4VG90EP3 high-pressure axial piston hydraulic pump is a variable displacement pump engineered exclusively for railway construction machinery. With a maximum speed of 3000 rpm and robust design, it delivers consistent hydraulic power under heavy-duty conditions. Its efficient closed-circuit operation, high-pressure capability, and long service life make it the preferred choice for critical railway engineering equipment.
The A4VG90EP3 is designed only for railway construction machinery, including:
Railway track laying machines
Railway maintenance vehicles
Hydraulic-powered tamping machines
Ballast regulators and rail alignment systems
High Efficiency: Variable displacement design optimizes performance while reducing energy consumption.
High Pressure Output: Rated up to 350 bar, with overflow pressure reaching 445 bar, suitable for heavy-duty railway applications.
Durability: Constructed from alloy steel and aluminum components for long service life.
Low Noise: Reduced noise design enhances operator comfort in railway construction environments.
Reliable Control: Equipped with EP3 electronic proportional control for precise flow adjustment.
| Attribute | Value |
|---|---|
| Model Number | A4VG90EP3DM1/32L-NSD10F07 |
| Displacement | 90ml/r |
| Work Mode | Closed circuit |
| Rated Speed | 3000rpm |
| Maximum Speed | 3300rpm |
| Overflow Pressure | 445bar |
| Cut-Off Pressure | 350bar (adjustable) |
| Housing Pressure | Max: 2bar |
| Suction Pressure | Min: 0.8bar |
| Replenishment Pressure | 25bar |
| Charge Pump Volume | 18ml/r |
| Control Mode | EP3 electrical proportional (DC 12V) |
| Filtration | Integrated oil filter, precision 10μm |
Material Selection – High-strength alloy steel and aluminum components.
Precision Machining – CNC machining ensures dimensional accuracy.
Heat Treatment – Increases hardness and wear resistance.
Assembly & Testing – Each unit undergoes high-pressure and leakage tests.
Surface Protection – Anti-rust coating applied to critical areas.
Fill the casing with clean hydraulic oil before operation.
Maintain oil cleanliness at NAS class 9 or better.
Avoid strong impacts on the transmission shaft during transportation.
Prevent hydraulic oil from contaminating external pump surfaces.
Regularly monitor system pressure and replace filters as needed.
Warranty: 12 months from delivery date.
Technical Support: Guidance on installation and commissioning.
Spare Parts: Genuine components available for fast replacement.
Repair Service: Professional maintenance teams support global customers.
Q1: Can the A4VG90EP3 be used outside railway machinery?
A1: No. This model is specifically designed only for railway construction machinery.
Q2: How often should the hydraulic oil be replaced?
A2: Oil replacement intervals depend on operating conditions but should follow NAS level cleanliness requirements.
Q3: What type of control system does it use?
A3: It uses an EP3 electric proportional control (DC12V) for precise output regulation.
Company Details
Business Type:
Manufacturer
Year Established:
2019
Total Annual:
5000000-6000000
Employee Number:
>55
Ecer Certification：
Verified Supplier
Shandong Keystone Hydraulic Co., Ltd. is located in Tai bai hu new district, Jining city, Shandong Province, the hometown of Confucius and Mencius. It is only 40 minutes away from Jining Daxing Airport and Beijing-Shanghai High-speed Railway Station, and only 10 minutes aw... Shandong Keystone Hydraulic Co., Ltd. is located in Tai bai hu new district, Jining city, Shandong Province, the hometown of Confucius and Mencius. It is only 40 minutes away from Jining Daxing Airport and Beijing-Shanghai High-speed Railway Station, and only 10 minutes aw...
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