1. Standard product design
2. High quality material selection
3. Advanced imported manufacture & testing equipment
4. Advanced manifacturing process and production technology
5. in the line with global standards
6. By long time testing, proved to be good condition
SK200-6 Hydraulic Piston Pump Overview
TheSK200-6is a medium-to-high-pressure axial piston variable-displacement pump designed for hydraulic systems in construction machinery, industrial equipment, and mobile machinery. Its core advantages include high efficiency, compact structure, high-pressure durability, and adaptability to harsh operating conditions. It is widely used in excavators, loaders, die-casting machines, and other applications requiring precise flow control and continuous high-pressure output.
------
Key Design Features
1. Axial Piston Variable-Displacement Structure
• Stepless flow adjustment via swashplate angle control (displacement range: 200 cm³/rev).
• High-precision fit between pistons and cylinder block minimizes leakage, achieving volumetric efficiency of90%–93%.
2. High-Pressure Durability
• Rated pressure:28 MPa (4,060 psi); peak pressure:32 MPa (4,640 psi).
• Suitable for hydraulic breakers, injection molding machines, and other high-pressure systems.
3. Wear-Resistant Materials and Surface Treatments
• Pistons, cylinder blocks, and port plates are made ofhigh-strength alloy steel, hardened and nitrided (HRC 58–62) for excellent wear resistance.
• Seals (fluororubber/PTFE) operate in temperatures ranging from-30°C to +120°C, compatible with mineral oils and some eco-friendly hydraulic fluids.
4. Low Noise and Vibration
• Optimized flow path design reduces hydraulic shock; precision bearings minimize mechanical vibration (operating noise ≤78 dB(A)).
5. Modular Design
• Independent replacement of pump body, drive shaft, and control valves reduces maintenance costs by25%–30%.
------
Key Technical Specifications
【表格】
Parameter SK200-6 Specifications
Theoretical Displacement 200 cm³/rev (12.2 in³/rev)
Rated Pressure 28 MPa (4,060 psi)
Peak Pressure 32 MPa (4,640 psi)
Speed Range 500–2,000 rpm
Drive Power Max. 95 kW (127 HP)
Weight Approx. 120 kg (265 lbs)
Oil Viscosity Range 10–400 cSt (kinematic viscosity)
Filtration Requirement NAS 7 class (≤15 μm)
------
Typical Applications
1. Construction Machinery
• Excavator travel, swing, and attachment (boom/bucket) control.
• Loader lifting and steering systems.
2. Metallurgical Industry
• Continuous casting machine mold oscillation and rolling mill press systems requiring precise high-pressure control.
3. Hydraulic Presses
• Metal stamping and forging equipment demanding high-flow, high-pressure output.
4. Marine and Offshore Engineering
• Deck machinery (winches, anchors) and steering systems adapted to seawater corrosion.
5. Test Rigs and Simulation Systems
• Structural fatigue testing and hydraulic servo-control systems requiring rapid response.
------
Selection and Configuration Guidelines
1. Pressure Matching
• System operating pressure must not exceed the pump’s rated pressure (28 MPa); reserve a10% safety margin.
2. Speed and Flow
• Select speed based on load:
• Heavy-duty: 500–1,200 rpm (stable low-speed operation).
• Light-duty: 1,500–2,000 rpm (efficient high-speed operation).
3. Fluid Compatibility
• Standard hydraulic oils: Use standard seals.
• Fire-resistant fluids (HFA/HFB): Replace with specialty seal materials.
4. Cooling Requirements
• For continuous operation, install air or water cooling to prevent overheating (recommended oil temperature ≤80°C).
------
Maintenance and Troubleshooting
1. Daily Inspections
• Oil level: Maintain at 1/2–2/3 tank capacity.
• Temperature: Monitor for abnormal heating (may indicate internal leakage or cooling failure).
2. Periodic Replacements
• Hydraulic oil: Replace every 1,500 operating hours or annually (adjust based on operating conditions).
• Filters: Replace every 500 hours to prevent contaminant ingress.
3. Common Faults
• Insufficient Flow: Check for suction line blockage or internal leakage.
• Pressure Fluctuations: Adjust relief valves or inspect for stuck safety valves.
• Abnormal Noise: Tighten couplings or replace worn bearings.
------
Comparison with Similar Products
【表格】
Parameter SK200-6 Standard Gear Pump Vane Pump
Pressure Range 28 MPa (high-pressure) ≤18 MPa (medium-pressure) ≤20 MPa (medium-pressure)
Efficiency 90%–93% (volumetric) 75%–80% 80%–85%
Noise Level ≤78 dB(A) (low) ≥82 dB(A) ≤75 dB(A) (pulsating)
Fluid Compatibility Mineral/synthetic/fire-resistant Mineral oil only Mineral oil (viscosity-limited)
Cost Medium-high (performance-oriented) Low Medium
------
Summary
TheSK200-6 Hydraulic Piston Pumpis an ideal choice for medium-to-high-pressure hydraulic systems, particularly in applications requiring continuous reliability and high-pressure control.
