1. No handle levers will be provided with the valves. But we can make the handle levers to your sequests. If required, please comrtact with your sples representative,
2. The customers should fix the valves by the assemblaing holes on the inlet and ouslet alices. Diflarent effectional maybe achieved by different working silloes. Speical tentures not listed can often be made to your specifications, please consult your sales representative.
1. Product Overview
TheDF-50 Seriesis a monoblock (integrated) directional control valve designed specifically for hydraulic systems, featuring a compact, single-block structure that integrates multiple hydraulic functions into one valve body. Its core function is to control the flow direction of hydraulic oil via electromagnetic or manual operation, enabling the start, stop, direction reversal, and speed adjustment of actuators (e.g., hydraulic cylinders, motors).
Key Features:
• Monoblock Design: Reduces leakage points and enhances system reliability.
• Modular Combination: Supports multi-valve series connections for flexible functional expansion.
• High-Pressure Rating: Typically suitable for medium-to-high-pressure hydraulic systems (e.g., 210 bar/3000 psi).
• Fast Response: Electromagnetic valve switching time <50ms, ideal for dynamic control scenarios.
• Corrosion Resistance: Valve bodies are often made of cast iron or aluminum alloy with surface treatments (e.g., zinc plating) for enhanced durability.
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2. Core Functions
• Directional Control: Alters oil flow paths via spool shifting to extend/retract hydraulic cylinders or reverse motor rotation.
• Flow Regulation: Some models integrate throttle or proportional valves for actuator speed adjustment.
• Pressure Protection: Built-in or external relief valves prevent system overpressure.
• Manual/Electromagnetic Dual Operation: Supports manual emergency operation to ensure safety during power failures.
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3. Technical Specifications (Example)
【表格】
Parameter Typical DF-50 Series Value
Nominal Diameter (DN) 6 mm ~ 25 mm
Max. Working Pressure 210 bar (3000 psi)
Flow Range 10 L/min ~ 150 L/min
Operation Mode Electromagnetic, manual, pneumatic
Spool Positions 2-position/3-position (e.g., 2/2, 3/4-way)
Operating Temperature -20°C ~ +80°C
Protection Grade IP65 (dust/waterproof)
Port Type NPT, BSPT, or flange connections
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4. Typical Applications
• Construction Machinery: Hydraulic arm control in excavators and loaders.
• Agricultural Machinery: Hydraulic suspension systems in tractors and harvesters.
• Industrial Automation: Hydraulic drives in presses and injection molding machines.
• Marine Equipment: Hydraulic control of steering gears and deck machinery.
• Logistics Equipment: Hydraulic systems in forklifts and lifting platforms.
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5. Selection Guide
1. Determine Spool Type:
• 2-Position Valves: Suitable for simple on/off control (e.g., single-action cylinders).
• 3-Position Valves: Ideal for scenarios requiring neutral locking or floating functions (e.g., bidirectional motor rotation).
2. Choose Operation Mode:
• Solenoid Valves: For automated systems; requires power supply and controller.
• Manual Valves: For debugging or powerless environments.
• Pneumatic Valves: For explosion-proof or remote operation scenarios.
3. Match Flow & Pressure:
• Select valve specifications based on system maximum flow and pressure to avoid excessive pressure drops or spool jamming.
4. Interface Compatibility:
• Ensure valve ports match hydraulic piping (e.g., NPT threads or flange connections).
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6. Installation & Maintenance
• Installation Orientation: Typically requires vertical mounting to prevent oil sedimentation.
• Filtration Requirements: Recommend hydraulic oil cleanliness of NAS 6 or ISO 18/15 to prevent spool wear.
• Regular Inspections:
• Solenoid coil insulation (test every 6 months).
• Spool movement flexibility (no jamming during manual operation).
• Seal aging (replace every 2 years).
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7. Common Issues & Solutions
【表格】
Symptom Possible Cause Solution
Valve body leakage Damaged seals or improper assembly Replace seals and reassemble.
Solenoid valve inaction Burnt coil or power failure Test coil resistance; replace solenoid.
Slow cylinder movement Spool jamming or insufficient flow Clean spool; check system flow.
System pressure fluctuations Improper relief valve setting Readjust relief valve pressure.
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8. Extended Features (Optional)
• Proportional Control: Integrates proportional solenoids for stepless flow/pressure adjustment.
• Bus Communication: Supports CANopen or Profibus protocols for digital control.
• Dual-Valve Combination: Integrates directional and pressure valves to simplify hydraulic circuit design.
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Summary: The DF-50 Series monoblock directional control valve stands out for its high integration, reliability, and flexibility, making it ideal for precision hydraulic control applications. When selecting a model, prioritize spool type, flow/pressure matching, and operation mode, and ensure regular maintenance for long-term stability. For specific model parameters or application cases, provide further requirements.
