Duplomatic DL3 DS5 DSE3 Solenoid Directional Valve | DL3-TA DS5-TA DS5-S2 | Hydraulic Control Valve

Chengyuan Hydraulic presents high-performance DL3, DS5, and DSE3 series solenoid directional valves, meticulously engineered as premium replacements for Duplomatic (Italy) standards. This lineup covers the industry-essential Size 06 (ISO 4401-03) and Size 10 (ISO 4401-05) configurations. As the “control hub” of any hydraulic system, reliability is paramount. Chengyuan ensures that specific models—including DL3-TA, DS5-TA, and DS5-S2—achieve 100% Drop-in Interchangeability in mounting patterns, port layouts, and electrical interfaces (DIN 43650). Backed by our signature 100% Simulation Load Testing, these valves maintain exceptional sealing and timing consistency even under high-frequency operation, making them the preferred choice for construction machinery and automated production lines.

Technical Specifications

• Series Models: DL3 (Size 06) / DS5 (Size 10) / DSE3 (Proportional)

• Nominal Size: 6 mm (DL3/DSE3) / 10 mm (DS5)

• Max Operating Pressure (Ports P/A/B): 350 bar (5076 psi) / 320 bar for DS5 series

• Max Tank Pressure (Port T): 210 bar (DC) / 160 bar (AC)

• Max Flow Rate (DL3): Up to 100 L/min

• Max Flow Rate (DS5): Up to 150 L/min

• Coil Voltages: D24 (24V DC), A230 (230V AC), D12 (12V DC)

• Spool Functions: TA (Spring Offset), S2 (3-position, closed center), C16 (Proportional control)

• Protection Class: IP65

• Seal Material: NBR (Standard) / FKM (Optional)

Key Technical Advantages:

• Wet-Armature Solenoid Design: The armature is fully immersed in oil, providing automatic lubrication and damping, which significantly reduces operational noise and mechanical vibration during shifting.

• Optimized Cast Galleries: Internal galleries are refined using CFD analysis to minimize pressure drops while maintaining high structural integrity, directly improving system thermal efficiency.

• High-Frequency Precision: The spools are crafted from high-strength alloy steel, deep-quenched and precision-lapped to ensure ultra-low internal leakage even after millions of cycles.

• Versatile Connectivity: Compatible with multiple coil specifications (D12, D24, A115, A230) and standard DIN 43650 connectors, ensuring excellent Electromagnetic Compatibility (EMC).

Application Areas:

• Industrial Automation: Auxiliary circuits in injection molding machines and die-casting machine control.

• Mobile Machinery: Pilot circuit switching for excavators and refuse compactor control systems.

• Heavy Power Units: Logic control circuits in steel mills and power generation equipment.

Expert Maintenance Tips:

• Electrical Protection: In DC 24V circuits, it is recommended to use surge suppression diodes to absorb back-EMF, protecting the life of the PLC output modules.

• T-Port Backpressure: If the valve overheats during frequent switching, inspect the T-port backpressure. Excessive backpressure can hinder the rapid resetting of the spool.

• Mounting Torque: Always use Grade 10.9 or higher bolts. Follow recommended torque settings (5Nm for DL3, 8Nm for DS5) to prevent micro-distortions in the valve body that could lead to spool sticking.