Duplomatic DS3 & DS5 Solenoid Directional Valve | DS5-SA2 DS3-S1 DS3-S2 DS5-S9

The DS3 Series (CETOP 03 / NG6 Size) and DS5 Series (CETOP 05 / NG10 Size) of wet-pin solenoid directional spool valves manufactured by Chengyuan Hydraulic are premium electro-hydraulic flow control components engineered to fully match the rigorous processing parameters of Duplomatic Oleodinamica. Outfitted with a heavy-duty, high-density cast iron 4-chamber block housing, this subplate-mounted platform is structurally designed to handle maximum continuous pressure and high fluid volume velocities while keeping internal fluid drop ($\Delta p$) and thermodynamic energy dissipation to an absolute minimum. Focusing closely on the targeted part combinations specified—DS5-SA2/14N-D24K1 (Single solenoid layout), DS3-S1/11N-A230K1 (Classic closed-center layout), DS3-S2/11N-D24WK1/CH/W7 (Corrosion-resistant manual-override setup), and DS5-S9/14N-D220K1/F (Shock-damped high-voltage layout)—Chengyuan applies absolute multi-axis CNC bore honing, sub-micron spool-clearance matching, and high-insulation encapsulated wet solenoid execution. This technical precision delivers 100% original-place interchangeable plug-and-play compatibility for all standard ISO 4401 mounting layouts, replication of coil dynamic switching frequencies, and zero external leakage stability. Prior to warehouse delivery, every individual valve is subjected to 100% simulated loaded loop evaluations, cross-port leakage audits, and solenoid high-frequency cycling validation, ensuring stable performance for complex B2B automation circuits.

Technical Specifications :

• Brand Compatibility Matrix: Duplomatic DS3 & DS5 Direct-Operated Solenoid Valve Series Equivalent

• Target Model Nomenclatures Covered: DS5-SA2/14N-D24K1, DS3-S1/11N-A230K1, DS3-S2/11N-D24WK1/CH/W7, DS5-S9/14N-D220K1/F

• Physical Size Configurations: CETOP 03 / NG6 Interface (DS3 Group) and CETOP 05 / NG10 Interface (DS5 Group)

• Spool Function Configuration Breakdown:

  • DS5-SA2 Layout: 2-position, 4-way single solenoid configuration with spring return / Spool Type A2 (P to A normally connected at rest) / 14N Design sequence

  • DS3-S1 Layout: 3-position, 4-way double solenoid configuration with spring centering / Spool Type S1 (All ports blocked in center position / closed center O-type) / 11N Design sequence

  • DS3-S2 Layout: 3-position, 4-way double solenoid configuration with spring centering / Spool Type S2 (All ports open to each other in center position / open center H-type)

  • DS5-S9 Layout: 3-position, 4-way double solenoid configuration with spring centering / Spool Type S9 (P port blocked, A and B open to tank T in center position / Y-type float center)

• Solenoid Electrical Driver Suffixes: D24 = 24V DC / A230 = 230V AC (50/60 Hz) / D220 = 220V DC heavy-voltage coil configuration

• Physical Electrical Junction: K1 Standard Type (DIN 43650 / ISO 4400 square 3-pin plug connection interface, rated IP65/67 protection)

• Maximum Allowable Continuous Operating Pressure:

  • DS3 Series (NG6 Group): Ports P, A, B rated up to 350 bar (5075 PSI); Return T-port max backpressure at 210 bar (DC) / 160 bar (AC)

  • DS5 Series (NG10 Group): Ports P, A, B rated up to 320 bar (4640 PSI); Return T-port max backpressure at 210 bar (DC) / 160 bar (AC)

• Maximum Volumetric Delivery Capacity:

  • DS3 Frame Size (NG6 Group): Delivers up to 100 L/min (26.4 GPM)

  • DS5 Frame Size (NG10 Group): Delivers up to 150 L/min (39.6 GPM)

• Target Industry Specialized Coding: WK1 Suffix = Weatherproof heavy boot manually operated zinc-alloy override lever assembly; CH Suffix = Specially chemically nickel-plated spool/housing matrix for severe corrosion resistance; F Suffix = Integrated micro-orifice pilot restrictor block for dynamic spool speed smoothing

• Mounting Standard Specification: ISO 4401-03-02-0-05 (DS3 Layout) and ISO 4401-05-04-0-05 (DS5 Layout)

Key Technical Advantages:

• Streamlined 5-Chamber Casting Blocks for Superior Volumetric Efficiency: The external enclosure block is poured from close-grain structural cast iron utilizing premium resin sand molding lines. The internal core pathways feature advanced 5-chamber flow channels. This smooth internal boundary geometry minimizes dynamic fluid contraction and flow friction, reducing total pressure drop ($\Delta p$) by 15-20% under a full 150 L/min delivery, preventing power attenuation.

• Honed Micron-Clearance Spool Bores with Anti-Surge Edge Profiling: The primary control spools are ground from low-alloy steel blocks, gas-carburized, and hardened to precise Rockwell targets. The internal valve sleeve bore undergoes automated CNC cross-hatch honing. The spool control lands are machined with optimized metering steps or notch borders, achieving a zero cross-over fluid profile and preventing sharp hydraulic shock transitions during high-duty switching cycles.

• Wet-Pin Heavy-Insulation Removable Solenoid Core Assembly: The electric coils utilize a wet-pin armature tube layout where the moving pole piece is fully submerged in and lubricated by circuit oil. This configuration dampens mechanical impact noise and provides excellent thermal conduction away from the copper windings. The outer coil housing is secured via an end-retaining knurled shell, allowing fast hot-swapping of electrical elements without breaking plumbing seals or purging the hydraulic oil.

• Fatigue-Resistant Spring Sets with High Flow-Force Counteraction: Centering and return spring groups are manufactured from pre-stressed chrome-vanadium spring wire subjected to micro-shot peening audits. Engineered to prevent structural spring relaxation under continuous cycle regimes, they secure accurate center-point locking. Paired with high-torque solenoids, the mechanism easily overcomes raw dynamic fluid stream forces that cause spool stiction under high flow velocities.

Application Areas:

• Heavy Automotive & Stamping Production Lines: Multi-station centralized control valve manifolds managing robotic material indexing, heavy automotive sheet metal clamping, and frame transfer mechanisms.

• Industrial Plastics and Rubber Thermoforming Machinery: Main sequence control arrays managing clamping core operations, part ejection cycles, and high-frequency secondary gate actuation on large injection molders.

• Primary Metallurgical & Heavy Handling Infrastructure: Coil spooling auxiliary manifolds on steel cold-rolling lines, drilling rig auxiliary controls, and modular subplate manifolds for heavy off-highway machinery.

Expert Maintenance Tips:

• Never Energize an AC Solenoid Coil (e.g., DS3-S1/11N-A230K1) While it is Separated From the Valve Tube: This is the single most critical safety and maintenance directive for alternative-current (AC) solenoid valves! If an AC coil is powered while suspended or removed from its internal armature tube, it loses the necessary inductive reactance provided by a closed magnetic loop. The current draw will instantly spike to several times normal operational levels, causing the coil to superheat and burn out within seconds. Always make sure the coil is fully seated over the core tube and the retaining end-nut is securely locked before switching on electrical lines.

• Enforce Strict Fluid Conditioning for Orifice-Damped Formats (Suffix /F): Models equipped with the “/F” suffix incorporate microscopic, laser-calibrated restriction nozzles inside the spool core to slow shifting actuation and prevent high-flow pressure spikes. If the circuit fluid accumulates particulates larger than 10 microns, or develops oxidation lacquer, these tiny orifices can quickly clog. This results in sluggish shifting or locks the spool in an off-center posture. Ensure the system maintains a filtration index of at least $\beta_{10} \ge 100$.

• Torque Mounting Screws via an Incremental Cross-Pattern to ISO Limits to Avoid Spool Stiction: When mounting the subplate valve face over its target block interface (sealed via the supplied high-grade Nitrile O-rings), never clamp the four socket-head fasteners (M5 for DS3; M6 for DS5) using a basic hand key. Always use a calibrated torque wrench to tighten the bolts in a 3-stage diagonal cross-pattern: target exactly 5 Nm for the DS3 frame and 8-9 Nm for the DS5 frame. Uneven or excessive clamping forces distort the valve housing on a micron scale, causing immediate spool stiction or solenoid failure.