H6LC Direct-Drive Servo Valve
3 week ago
Product details
H6LC Direct-Drive Electro-Hydraulic Servo Valve
Product Overview
H6LC direct-drive electro-hydraulic servo valve is a single-stage direct-operated servo valve with NG6 installation specification. It adopts high-performance linear force motor to directly drive the main spool, eliminating independent pilot stage and pilot oil circuit. Built-in LVDT spool position closed-loop feedback and integrated drive amplifier (OBE). This structure avoids vulnerable nozzle-flapper components, significantly improving contamination resistance. Standard ISO 4401-03 mounting interface, stable static & dynamic performance. Widely used as a cost-effective replacement for imported direct-drive servo valves for medium & small flow precision hydraulic closed-loop control systems.
H6LC Direct-Drive Servo Valve is an advanced direct-drive electro-hydraulic Hydraulic valve. It can be used as high-performance Excavator Spare Parts and precision control component for high-end hydraulic system. Different from traditional pilot-operated servo valves, this Hydraulic valve adopts direct drive structure, which eliminates the pilot stage. It accurately adjusts hydraulic oil flow and direction according to electrical signals, realizing precise motion control and significantly enhancing the control stability and reliability of the hydraulic system. When configured as Excavator Spare Parts, it greatly improves the operating flexibility of excavator working mechanisms.
Common Rated Flow Specifications
Rated flow measured at ΔP=70 bar: 10 L/min, 20 L/min, 30 L/min, 40 L/min
- Structure: Single-stage direct drive, 4-way servo valve
- Driving form: Linear force motor direct drive, no pilot stage
- Feedback: Built-in LVDT electrical position feedback
- Electronics: Integrated servo drive amplifier
- Mounting standard: ISO 4401-03 (NG6)
Main Technical Parameters
Parameter Specification
Valve Type Direct-Drive Single-Stage Electro-Hydraulic Servo Valve
Max Working Pressure (P/A/B Ports) 315 bar (31.5 MPa)
Maximum Allowable Return Pressure (T Port) ≤100 bar
Recommended Hydraulic Fluid ISO VG32, VG46 anti-wear mineral hydraulic oil
Permitted Oil Cleanliness NAS 8 or higher cleanliness grade
Operating Temperature -25°C ~ +80°C
Hysteresis ≤2.5%
Resolution ≤0.4%
Control Signal ±10V DC / 4~20mA optional
Step Response Time (0~100% command) ≤8 ms
Anti-Vibration Capacity 25g triaxial vibration
Product Advantages
1. Direct-drive structure without pilot stage, no tiny nozzle or flapper, outstanding anti-pollution ability, less demanding on hydraulic oil cleanliness
2. Built-in LVDT closed-loop position feedback, excellent repeatability and control linearity, stable positioning accuracy
3. Integrated servo amplifier, pre-calibrated at factory, convenient wiring and fast on-site commissioning
4. Low standby leakage, effectively reduces system heat generation and energy consumption
5. Compact NG6 cast iron housing, small installation footprint, suitable for limited-space manifold layout
6. Standard ISO mounting dimensions, interchangeable with mainstream international NG6 direct-drive servo valves
7. Simplified internal structure, fewer easily damaged precision components, lower maintenance frequency and running cost
Application Range
Material testing equipment, small fatigue test benches, precision forming machinery, automation production lines, robot hydraulic drive units, pressure & position closed-loop control equipment, medium-precision industrial servo hydraulic systems with medium-small flow demand.
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