Inner check valve: The check valve inside the valve body to insure the hydraulic oil not to be returned.
Inner relief valve: The relief valve inside the valve body is able to adjust the hydraulic system working pressure.
Oi way: Parallel circuit, with power beyond.
Vaive construction: monablock construction, 1-7 levers are available to assembled as you requests. Sooal Function:O.A.Y etc.
ZDa-L15 Electric and Hydraulic Composite Control Valve
——Technical Overview & Application Guide
1. Product Overview
• Model: ZDa-L15
• Type: Electric-Hydraulic Composite Control Valve (Dual-Power Driven, Supporting Both Electric and Hydraulic Actuation)
• Function:
• Combines the precision of electric control with the high torque of hydraulic drive, suitable for flow, pressure, or directional control under complex operating conditions.
• Enables remote automated operation (electric mode) or local hydraulic emergency control (hydraulic mode).
2. Technical Specifications (Example, Subject to Manufacturer's Data)
【表格】
Parameter Specification
Nominal Diameter (DN) DN15 (Customizable from DN10 to DN100)
Connection Method Flange, Thread, or Welding
Actuation Method Electric (Motor-Driven) + Hydraulic (Oil-Pressure-Assisted)
Power Requirement AC220V/380V or DC24V (Explosion-Proof Options Available)
Hydraulic Pressure Range 0.5~25 MPa (Hydraulic Drive Pressure)
Control Accuracy ±1% (Electric Mode), ±3% (Hydraulic Mode)
Response Time ≤0.3s (Electric), ≤0.1s (Hydraulic)
Protection Grade IP65 (Electric Part), IP67 (Hydraulic Part)
Operating Temperature -20°C~+120°C (Standard), -40°C~+150°C (High-Temperature Version)
Valve Body Material Stainless Steel (SS304/SS316), Carbon Steel, or Alloy Steel
Sealing Material PTFE (Polytetrafluoroethylene), FKM (Fluororubber), or Metal Seals
3. Core Features & Advantages
• Dual-Power Redundancy Design:
• Electric Priority: Supports PLC, DCS, or remote IoT control for high-precision regulation.
• Hydraulic Emergency Backup: Ensures safe operation during power outages or electric failures via manual/automatic hydraulic switching.
• High Torque Output:
• Hydraulic drive provides large thrust, suitable for high-pressure, high-flow, or viscous media (e.g., sludge, high-viscosity liquids).
• Fast Response:
• Hydraulic mode achieves ≤0.1s response time, ideal for emergency shutdowns or rapid regulation (e.g., pressure control in chemical reactors).
• Resistance to Harsh Environments:
• Explosion-proof, waterproof, and corrosion-resistant design for mining, offshore platforms, or hazardous chemical environments.
4. Working Principle
• Electric Mode:
• Motor drives gears or screws to move the valve core, with position sensors for closed-loop control.
• Hydraulic Mode:
• Hydraulic oil pushes the valve core via a cylinder, monitored by pressure sensors for stable output.
• Switching Logic:
• Automatic Switching: Hydraulic system takes over upon detecting electric failure.
• Manual Switching: External control buttons or solenoid valves force mode switching.
5. Application Scenarios
【表格】
Industry Typical Applications
Petrochemical High-Pressure Pipeline Flow Regulation, Emergency Shutdown Valves (ESD)
Mining Machinery Hydraulic Support Pressure Control, Slurry Pump Flow Regulation
Marine Engineering Ship Steering Hydraulic Control, Seawater Desalination System Valves
Energy & Power Turbine Bypass Valves, Boiler Feedwater Regulation Valves
Military & Aerospace Missile Launch Hydraulic Control, Special Equipment Redundancy Systems
6. Selection Guide
• Material Selection Based on Media:
• Corrosive media: SS316 valve body + PTFE seals.
• High-temperature media: Heat-resistant alloy + metal seals.
• Drive Mode Selection Based on Control Needs:
• Precision control: Prioritize electric mode with high-precision position sensors.
• Rapid response: Hydraulic mode as primary, equipped with high-flow hydraulic pumps.
• Environmental Protection:
• Explosion-proof requirements: Choose Exd II CT4-rated electric actuators.
• Waterproof requirements: IP67 for hydraulic parts, IP65 for electric parts.
7. Installation & Maintenance Tips
• Installation Notes:
• Independent routing of electric and hydraulic pipelines to avoid cross-interference.
• Hydraulic systems require filters to prevent oil contamination from blocking valve cores.
• Maintenance Recommendations:
• Regularly check the lubricating oil in the electric actuator gearbox; replace hydraulic oil every 6 months.
• Replace seals every 2 years (adjust based on operating conditions).
• Troubleshooting:
• Electric Inaction: Check power supply, motor windings, and position sensors.
• Hydraulic Leakage: Inspect cylinder seals and hydraulic pipe fittings.
8. Comparison with Similar Products
【表格】
Comparison Item ZDa-L15 Electric-Hydraulic Composite Valve Pure Electric Control Valve Pure Hydraulic Control Valve
Power Redundancy Dual power, automatic switching upon failure Single power, manual intervention required upon failure Single power, backup pump required upon failure
Response Speed Electric: 0.3s, Hydraulic: 0.1s 0.5~1s (dependent on motor torque) 0.1~0.3s (hydraulic-driven)
Applicable Media Gases, liquids, viscous media Clean gases/liquids High-pressure, high-flow media
Cost Medium-High (dual system) Low (single system) Medium (high hydraulic pump cost)
9. Summary & Recommendations
• Recommended Scenarios:
• Industrial applications requiring high reliability, rapid response, and harsh environments (e.g., chemicals, mining, marine).
• Non-Recommended Scenarios:
• Low-cost applications needing only simple on/off control (pure electric valves are more economical).
• Recommended Configuration:
• Explosion-proof electric actuator + corrosion-resistant valve body + hydraulic emergency switching module.
