1. Model Code Breakdown (3DREP6C-10B/16A24NZ4)
HUADE hydraulic valve models typically consist ofseries codes, functional codes, structural parameters, and control methods. Below is a detailed breakdown:
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Code Segment Meaning Example Analysis
3DREP Series Code: Indicates "electro-hydraulic proportional pressure reducing/relief valve" series (3D may represent third-generation electro-hydraulic proportional technology). 3D: Third-generation electro-hydraulic proportional control; REP: Pressure reducing (Reducing) + relief (Relief) functions.
6C Functional/Structural Code: "6" may denote maximum flow rating (e.g., 60 L/min), while "C" indicates a design variant (e.g., integrated check valve). 6: Flow rating; C: Integrated check valve or special sealing structure.
10B Port Size & Pressure Rating: "10" refers to nominal port size (10 mm), and "B" denotes pressure class (e.g., 16 MPa/160 bar). 10: DN10 port size; B: 16 MPa rated pressure (confirm against HUADE standards, may correspond to 160 bar).
16A24NZ4 Control & Additional Features: "16A" represents electrical interface (e.g., 24V DC proportional control), "24N" indicates pressure setting range, and "Z4" denotes special configurations. 16A: 24V DC proportional solenoid; 24N: Pressure setting range (e.g., 0–24 MPa); Z4: Explosion-proof or harsh-environment adaptation.
Note: Exact coding definitions should be verified with HUADE’s official documentation. The above is based on industry-standard conventions.
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2. Key Features & Technical Specifications
(1) Valve Type & Functionality
• Type: Electro-hydraulic proportional pressure reducing/relief valve (dual function).
• Reducing Mode: Precisely controls outlet pressure for system stability.
• Relief Mode: Automatically opens to protect against overpressure.
• Integrated Features: May include a check valve (C code), remote pressure control (N code), or explosion-proof design (Z4).
(2) Technical Parameters
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Parameter Typical Value Description
Nominal Port Size DN10 (10 mm) Flow range: ~10–40 L/min (refer to flow curves).
Rated Pressure 16 MPa (160 bar) Maximum allowable working pressure.
Control Method Electro-hydraulic proportional (24V DC) Pressure adjustment via proportional solenoid.
Pressure Setting Range 0–24 MPa (24N code) Adjustable via electrical signal or manual knob.
Response Time ≤30 ms Time from signal input to stable pressure output.
Fluid Compatibility Mineral oil, phosphate ester hydraulic fluid (verify). Must match system hydraulic fluid type.
Environmental Adaptability Z4 may indicate explosion-proof or low-temperature adaptation. Suitable for hazardous or cold environments.
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3. Typical Applications
(1) Injection Molding Machine Pressure Control
• Function: Controls hydraulic cylinder pressure during clamping, injection, and holding phases to prevent mold damage or product defects.
• Advantage: Proportional control enables precise pressure gradients for improved molding quality.
(2) Construction Machinery Multi-Way Valve Systems
• Function: Serves as a primary pressure reducing valve for walking, swinging, and excavating motions.
• Advantage: Integrated relief function prevents system overload.
(3) Hydraulic Test Benches
• Function: Simulates varying pressure conditions to test component performance.
• Advantage: Electro-hydraulic proportional control allows rapid, accurate pressure adjustments.
(4) Wind Turbine Pitch Systems
• Function: Controls hydraulic cylinder pressure for blade angle adjustment.
• Advantage: Explosion-proof design (Z4) suits offshore wind turbine environments.
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4. Selection & Usage Guidelines
(1) Key Selection Criteria
• Pressure Matching: System maximum pressure must not exceed valve rating (16 MPa).
• Flow Matching: Select port size based on flow curves (DN10 suits ≤40 L/min).
• Control Requirements: Confirm need for proportional (24V DC) or manual control.
• Environmental Needs: Specify explosion-proof (Z4), low-temperature, or corrosive-resistant variants.
(2) Installation & Commissioning
• Orientation: Ensure valve arrow aligns with oil flow direction.
• Electrical Connection: Connect 24V DC proportional solenoid to control cabinet, avoiding signal interference.
• Pressure Setting: Adjust via knob or electrical signal; validate with a pressure gauge.
• Filtration: Install a 5 μm filter to prevent valve spool sticking.
(3) Common Faults & Troubleshooting
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Symptom Possible Causes Solutions
Unstable pressure Signal interference, spring fatigue, oil contamination Shield electromagnetic interference, replace spring, clean/replace filter.
Frequent relief activation System overpressure, low valve setting Adjust setting pressure, check system load.
Solenoid inaction Power failure, coil burnout, signal wire break Check power supply, replace coil, repair wiring.
Severe leakage Seal aging, valve body scratches Replace seals, lap valve body.
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5. Competitor Comparison & Alternative Models
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Brand/Model Advantages Disadvantages
HUADE 3DREP6C-10B/16A24NZ4 Cost-effective, high integration, explosion-proof adaptability Less recognized in premium markets (domestic brand).
Rexroth DBETE-6X/ German precision, high accuracy, fast response Expensive, long lead times.
Yuken A145-F06R Japanese reliability, strong contamination resistance Limited flow range, high customization costs.
