H7M Mechanical Feedback Servo Valve
3 week ago
Product details
H7M Mechanical Feedback Electro-Hydraulic Servo Valve
Product Overview
H7M series two-stage mechanical feedback electro-hydraulic servo valve adopts classic dual nozzle-flapper pilot stage matched with dry torque motor. The spool displacement forms closed-loop control via cantilever spring mechanical feedback mechanism. It supports both 3-way and 4-way hydraulic control configuration, delivering outstanding static and dynamic control characteristics. Compact and robust mechanical structure, without built-in electronic sensor components. Standard ISO 10372 mounting interface, widely used as a cost-effective alternative to imported servo valves. Suitable for medium-precision closed-loop hydraulic systems requiring stable continuous operation under shock and vibration conditions.
H7M Mechanical Feedback Servo Valve is a high-performance Hydraulic valve, which acts as the crucial control component for precise hydraulic system. Unlike electrical feedback servo valves, this professional Hydraulic valve applies mechanical feedback structure. It converts electrical signals into proportional hydraulic flow to realize precise closed-loop motion control for industrial Machine. When assembled in the hydraulic system, H7M Mechanical Feedback Servo Valve ensures stable motion regulation and improves operation reliability of automated Machine
Common Rated Flow Specifications
Rated flow tested under ΔP=70 bar: 4L/min, 8L/min, 15L/min, 25L/min, 40L/min, 63L/min
- Structure: Two-stage, nozzle-flapper pilot, mechanical spring feedback, 4-way servo valve
- Control configuration: 3-way / 4-way optional
- Pilot supply: Internal pilot oil supply (standard)
- Mounting standard: ISO 10372-04 standard installation surface
- Electrical connection: Standard 4-pin aviation socket
Main Technical Parameters
Parameter Specification
Valve Type Two-Stage Mechanical Feedback 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
Required Oil Cleanliness NAS 7 or higher cleanliness grade
Operating Temperature -29℃ ~ +135℃
Hysteresis ≤ 3.0%
Resolution ≤ 0.5%
Rated Control Current ±20mA / ±40mA (coil wiring optional)
Anti-Vibration Capacity 30g triaxial vibration (10Hz ~ 2000Hz)
Step Response Time (0~100% signal) ≤ 16 ms (Standard version); ≤7 ms (high-response version)
Product Advantages
1. Mature nozzle-flapper + mechanical feedback architecture, proven reliable design, fewer electronic vulnerable parts, strong anti-interference capability
2. Dry torque motor design, stable output torque, excellent zero drift performance under long-time continuous operation
3. High resolution and low hysteresis, good linearity and repeatability for position, force and pressure closed-loop control
4. Rugged valve body structure, excellent shock and vibration resistance, adaptable to harsh industrial field environments
5. Modular pilot assembly, the built-in filter of pilot stage can be replaced on site conveniently
6. Multiple coil connection modes (series / parallel) available to match different servo amplifiers
7. Standard international mounting dimension, interchangeable with mainstream imported small-flow mechanical feedback servo valves
8. Simple zero adjustment, easy maintenance and low overall operation cost
Application Range
Material testing machines, static & fatigue test benches, hydraulic pressure control equipment, metallurgical auxiliary machinery, industrial simulation test platforms, precision forming equipment, general-purpose closed-loop servo hydraulic systems requiring small & medium flow.
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