Duplomatic DS3 DS5 Proportional Directional Valve DSE3-C16 DS3-TB DS5-TA

The heavy-duty Duplomatic Compatible Industrial Directional and Proportional Control Valves (comprising core market configurations DSE3-C16/10N-D24K11, DSE3-C16/10N-D24K1, DS5-TA/12N-D24K1, and DS3-TB/11N-230K1), engineered by Chengyuan Hydraulic, stand as premier, high-fidelity subplate-mounted fluid power components delivering 100% direct drop-in interchangeability within automated factory production frameworks, heavy-duty machinery systems, and modular stackable manifolds. Whether navigating high-frequency bang-bang solenoid switching via the DS3/DS5 units or demanding stepless, precise volumetric velocity management through the DSE3 proportional spool assemblies, this comprehensive matrix perfectly conforms to ISO 4401 specifications (ISO 4401-03-02 for NG6 / ISO 4401-05-04 for NG10) and CETOP standards. Factory maintenance supervisors and hydraulic system builders can complete rapid drop-in maintenance changes on standard mounting footprints with zero secondary alterations to existing circuit hardlines.

Operating as the primary directional control node inside sophisticated electro-hydraulic layouts, the precision of the spool stroke and its transient frequency response govern the smooth motion profile of the entire actuator system. At Chengyuan, build quality is confirmed digitally; 100% of our manufactured subplate and proportional valves undergo 100% rigorous dynamic simulation test bench criteria. For directional on-off valves (DS3/DS5), we test under multi-frequency pressure spikes at maximum parameters up to 350 bar to map structural limits against hydraulic binding and internal cross-port degradation. For proportional models (DSE3), we log the input current-to-flow hysteresis metrics (Hysteresis $\le 6\%$), dead-band linearity profiles, and fast step-responses. This careful testing ensures millions of error-free cycles under continuous industrial operation.

Technical Specifications

• Product Series Classification: Duplomatic Series Direct-Acting Solenoid Valves (DS3/DS5) & Direct-Acting Proportional Directional Valves (DSE3)

• Maximum Permissible Working Pressure Profile:

  • DS3 / DSE3 Series (CETOP 03 / NG6): Main ports P, A, and B rated up to 350 bar; Tank port T allowed continuous back-pressure up to 210 bar (with DC coils).

  • DS5 Series (CETOP 05 / NG10): Main ports P, A, and B rated up to 320 bar; Tank port T allowed continuous back-pressure up to 210 bar.

• Maximum Volumetric Flow Delivery Threshold:

  • DS3-TB Standard Configurations: Up to 100 L/min maximum.

  • DS5-TA Standard Configurations: Up to 150 L/min maximum.

  • DSE3-C16 Proportional Configurations: Rated control output of 16 L/min (measured at valve pressure drop $\Delta P = 10$ bar).

• Recommended System Fluid Standards: Premium anti-wear mineral oil base matching or exceeding ISO 4406 20/18/15 cleanliness limitations

• Model Nomenclature Code Breaking & Engineering Parameters:

  • Part Number: DSE3-C16/10N-D24K11

    • Mounting Size: CETOP 03 / NG6 interface.

    • Spool Designation & Flow C16: 3-position, 4-way, closed center configuration with a 16 L/min proportional flow rate rating.

    • Design Grid & Seals: Series 10 design version, equipped with standard NBR nitrile seals.

    • Electrical Interface D24K11: Outfitted with a 24V DC proportional solenoid capsule, K11 style plug setup, designed for external proportional amplifier closed/open-loop velocity modulation.

  • Part Number: DSE3-C16/10N-D24K1

    • Shares identical physical layout with the K11 configuration, utilizing a 24V DC proportional solenoid coil paired with a standard K1 DIN connector plug for standard proportional speed control applications.

  • Part Number: DS5-TA/12N-D24K1

    • Mounting Size: High-flow CETOP 05 / NG10 interface standard.

    • Spool Designation TA: 2-position, 4-way, single solenoid assembly with spring return.

    • Electrical Interface D24K1: Powered by a 24V DC continuous-duty switching solenoid capsule with a standard K1 connector socket (DIN 43650).

  • Part Number: DS3-TB/11N-230K1

    • Mounting Size: Compact CETOP 03 / NG6 interface standard.

    • Spool Designation TB: 2-position, 4-way, single solenoid assembly with spring return.

    • Electrical Interface 230K1: Configured with a 230V AC (50/60Hz) alternating current switching coil capsule, paired with a standard K1 DIN box connector plug.

Key Technical Advantages

• Flow-Optimized Ductile Iron Casting Body: The main valve body is shell-molded from premium, high-strength ductile iron. Internal core pathways are refined through 3D fluid mapping to minimize internal turbulence and eddying, achieving over a 15% reduction in pressure drop ($\Delta P$) during peak flow compared to basic castings to improve overall system energy efficiency.

• Hardened Alloy Steel Spools with Equalization Ring Grooves: Spools are machined from specialized alloy structure steel, heat-treated for optimal surface hardness, and precision-ground to sub-micron dimensional tolerances. The spool lands feature micro-machined radial balancing grooves that equalize hydraulic fluid forces under high pressure, completely eliminating lateral spool locking and binding.

• Oil-Immersed Wet-Armature Solenoids with Class H Encapsulation: The heavy-duty armatures run completely submerged within the system fluid, providing continuous lubrication and cushioning while using returning oil flow to dampen switching noise. The coil structures are vacuum-sealed in a rugged epoxy matrix rated to Class H insulation (180°C), supporting a 100% ED continuous operating duty cycle.

• Micro-Overlap Proportional Geometry with Low-Hysteresis Coils: For the DSE3 proportional matrix, spools are engineered with precise positive overlap thresholds and closely matched boundary tolerances. Low-hysteresis proportional magnets ensure the stroke force correlates linearly with input current signals, enabling predictable, stepless velocity control.

Application Areas

Thanks to their high operational durability and precise directional and proportional metering profiles, these subplate valves are widely utilized across complex automated industrial architectures:

• Metalworking Machinery & CNC Press Systems: The DSE3 proportional configurations manage smooth ram approach speeds and deceleration control profiles, while DS3/DS5 units handle clamping blocks and primary fluid directional isolation.

• Plastics & Rubber Injection Molding Equipment: Precise flow control during the injection phase via proportional units, alongside high-frequency solenoid-driven clamping and ejector core switching manifold stacks.

• Automated Production Assemblies & Robotics: Controlled proportional lift deceleration for automotive body lifts, and central control block integration for multi-axis sorting and positioning gantries.

Expert Maintenance Tips

• Enforce Tight Contamination Control in Proportional Circuits: The DSE3 proportional valve family utilizes fine clearances that are highly sensitive to particle abrasion. Maintain system oil cleanliness strictly at or above ISO 4406 18/16/13 standards (using inline high-pressure filtration rated under 10 microns). Fine particulate buildup can cause the proportional spool to drag or clog internal damping channels, leading to erratic flow modulation or system oscillation.

• Never Electrically Energize Dry or Trapped Solenoid Assemblies: Wet-armature coils rely on the system fluid for thermal dissipation and lubrication. Prior to initial machine commissioning, verify that the T-tank lines are fully primed with clean oil and all trapped air is bled. Avoid dry cycling or continuous rapid electrical pulsing when the system is dry, as dry friction will quickly generate localized hotspots and damage the solenoid tubes.

• Enforce Uniform Torque Sequences with a Calibrated Torque Wrench: Subplate-mounted valve scaling relies on uniform compression. Always utilize a torque wrench to tighten mounting fastners in a cross-symmetrical pattern over 2 to 3 progressive steps (target 5 N·m for CETOP 03, and 8.5 N·m for CETOP 05). Uneven or excessive torque can introduce micro-distortion into the valve bore, leading to spool binding or failure to return to center.