HVSE-18-08-PLL320-BE025 Control Valve
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SDLG 75/80 · Hengli 2nd‑Generation HVSE18 Control Valve Spare Parts (English Version with Embedded Keywords)
The Hengli 2nd‑Generation HVSE18 Hydraulic valve serves as the core control element of the hydraulic system on SDLG 75 and SDLG 80 excavators. This high-precision sectional directional valve is responsible for flow distribution and directional control. We supply a full range of genuine and high-quality Excavator Spare Parts for this Hydraulic valve, ensuring precise control and efficient operation of the hydraulic system.
1. Spool & Body Components
As the core of the Hydraulic valve, these directly influence the combined movement coordination of the hydraulic system:
· Main Spool: Precision-ground; wear leads to internal leakage and sticking within the hydraulic system.
· Valve Housing: High-strength cast iron that provides stable oil passages for the Hydraulic valve.
· Return Spring & Positioning Seat: Ensure spool return precision, making them critical Excavator Spare Parts for this Hydraulic valve.
2. Pilot & Control Elements
· Pilot Relief Valve: Regulates pilot pressure in the hydraulic system, protecting the control circuit of the Hydraulic valve.
· EPR Valve (Electro-Proportional Solenoid Valve): Optimizes the operating smoothness of the hydraulic system; commonly stocked as electrical Excavator Spare Parts for this Hydraulic valve.
· Solenoid Directional Valve: Works with the hydraulic system to enable functions such as auto-idle and travel speed shifting.
3. Seal & Service Kits
Essential Excavator Spare Parts for maintaining hydraulic system cleanliness and preventing leaks:
· Inter-section O-rings & Back-up Rings: Prevent external leakage between sections of the Hydraulic valve, stabilizing hydraulic system pressure.
· End Cover Gaskets: Protect the interior cleanliness of the Hydraulic valve.
1. Core Architecture of Hydraulic Systems in SDLG 75 and SDLG 80
The SDLG 75 and SDLG 80 are compact hydraulic excavators featuringload-sensing controlas their core technology. Their hydraulic systems rely on a combination ofvariable displacement pumps + multi-way valvesto achieve efficient energy distribution. Key components include:
• Main Pump: A swashplate-type axial piston pump (e.g., Hengli HP6V series) adjusts swashplate angle for stepless flow variation, matching actuator demands.
• Multi-Way Valve: Integrates pressure compensation to ensure independent flow allocation during compound operations, preventing interference.
• Hydraulic Cylinders: Include boom, arm, bucket cylinders, and travel motors, controlled by the multi-way valve for direction and speed adjustments.
• Hydraulic Valves: Cover main valves (HVSE series), check valves, relief valves, etc., withHengli’s 2nd-generation control valve HVSE18being critical.
2. Hengli 2nd-Generation Control Valve HVSE18: Technological Breakthroughs and Performance Advantages
1. Technological Positioning
The HVSE18 is aload-sensing multi-way valvedesigned for small-to-medium excavators (6–25 tons), supporting CAN bus high-speed communication for electro-hydraulic proportional control. Its upgrades focus on:
• High-Precision Control: CAN bus signals reduce spool displacement response time to<50ms, with flow control errors ≤ ±2%.
• Energy Efficiency: Integrated pressure compensation minimizes system pressure loss, saving15–20%energy compared to traditional valves.
• Modular Design: Supports multi-valve combinations for scalability across different excavator models.
2. Key Specifications
【表格】
Parameter Value
Rated Pressure 350 bar
Maximum Flow Rate 180 L/min
Spool Type Slide valve (with pressure compensation)
Control Method Electro-hydraulic proportional control (CAN bus)
Applicable Models 6–25-ton excavators (e.g., SDLG 75/80)
3. Application Scenarios
• Compound Motion Control: Ensures independent flow allocation during simultaneous boom lift + bucket excavation, preventing speed degradation.
• Fine Motion Control: Enables precise bucket positioning via electro-hydraulic signals for delicate tasks (e.g., earthwork leveling).
• Energy-Saving Mode: Dynamically adjusts pump displacement based on load demand, reducing idle power consumption.
3. Synergy Between SDLG 75/80 Hydraulic Systems and HVSE18
1. System Efficiency Enhancement
The load-sensing capability of HVSE18 aligns seamlessly with SDLG’s variable displacement pumps:
• Pump-Valve Coordination: Maintains a constant pressure differential (typically 20 bar) between pump outlet and valve inlet, minimizing throttling losses.
• Dynamic Response: Spool responsiveness shortens system delays, improving operational efficiency.
2. Reliability Validation
• Durability Testing: HVSE18 passes1 million cycle life tests, with spool wear <0.01mm, ensuring long-term stability.
• Environmental Adaptability: Operates in temperatures ranging from-40°C to +80°C, suitable for extreme conditions (e.g., high altitudes, cold regions).
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