H7LC Rotary Direct-Drive Servo Valve
3 week ago
Product details
H7LC Rotary Direct-Drive Servo Valve
Product Overview
H7LC Rotary Direct-Drive Servo Valve (RDDV) is a new-generation electro-hydraulic servo valve. It adopts a rotary torque motor matched with eccentric conversion mechanism, converting rotary motion into linear spool displacement. The built-in closed-loop position feedback precisely adjusts the opening of valve orifices to realize accurate flow control.
Different from traditional nozzle-flapper two-stage servo valves, this valve requires no pilot oil supply. It is an ideal domestic replacement solution for imported servo valves, featuring compact layout and outstanding contamination resistance.
H7LC Rotary Direct-Drive Servo Valve is an innovative high-response Hydraulic valve for precision control. As a breakthrough rotary-type control component, this Hydraulic valve is perfectly matched with advanced closed-loop hydraulic system. The H7LC Rotary Direct-Drive Servo Valve adopts exclusive rotary direct-drive structure instead of traditional linear spool design. It converts electrical signals into rotary motion of valve core to continuously adjust hydraulic flow and direction. Installed in the hydraulic system, the H7LC Rotary Direct-Drive Servo Valve delivers rapid and precise regulation, greatly improving motion control performance of high-end precision Machine.
Key Technical Specifications
- Max working pressure: 315 bar (P/A/B ports); Return port: ≤100 bar
- Rated flow options (@ΔP=35bar): 5 /10 /20 /40 L/min
- Frequency response: ≥90 Hz
- Hysteresis: ＜0.3%
- Threshold: ＜0.1%
- Supply voltage: 24 VDC
- Command signal: ±10 V / ±10 mA / 4~20 mA (optional)
- Fluid temperature range: -20℃ ~ +85℃
- Recommended oil cleanliness: NAS 8 or better
- Standard 6-ways mounting interface
Working Principle
The electrical command signal is transmitted to the integrated drive controller. The rotary motor converts electric signals into rotary motion, and the eccentric structure transforms rotation into linear spool movement. The built-in position sensor feeds back real spool position to form closed-loop control. The valve adjusts the flow direction and output flow continuously to realize precise control of position, speed and force for hydraulic actuators.
Core Advantages
1. Rotary direct-drive structure, no pilot oil needed, simplifying hydraulic system layout
2. No easily blocked nozzle and flapper structure, excellent anti-pollution capacity, lower maintenance cost
3. Compact miniaturized structure, lighter weight, suitable for limited installation space
4. Stable low-pressure performance, dynamic characteristics independent of inlet pressure
5. Ultra-low hysteresis and high resolution, superior static & dynamic control performance
6. Integrated drive electronics, supports on-site zero adjustment; strong EMC anti-interference capability
7. Standard mounting base and electrical interface for easy replacement of competing brands
8. Optional configuration for hydraulic medium or gas medium control
Typical Application Fields
- Aerospace & military simulation test platforms
- Material testing machines and comprehensive hydraulic test benches
- Metallurgical equipment: strip steering, rolling mill control system
- Hydraulic robots, automation precision forming equipment
- Wind power pitch control, turbine electro-hydraulic regulation system
- Precision plastic & woodworking machinery
- Mobile hydraulic platforms and special engineering equipment
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Ningbo Hengnuo Hydraulic Drive Co.,Ltd
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4 year
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