Duplomatic DS5 & DS3 Solenoid Valve DS5-S2/12N-A230K1 DS3-S3/11N-D24K1

The heavy-duty Duplomatic Compatible DS3 & DS5 Series Industrial Directional Solenoid Valves (featuring premier multi-industry sub-configurations DS5-S2/12N-A230K1, DS3-S3/11N-D24K1/CPK, and DS3-S4/11N-D12K1), manufactured by Chengyuan Hydraulic, stand as top-tier subplate-mounted fluid control units engineered for 100% direct drop-in interchangeability within worldwide automated factory lines, centralized Hydraulic Power Units (HPUs), and stackable CETOP manifold assemblies. Conforming perfectly to standard ISO 4401 specifications (ISO 4401-03-02 for DS3 / ISO 4401-05-04 for DS5) and CETOP manufacturing footprints, this matrix completely mirrors original Duplomatic MS physical dimensions, interface bolt pitches, positioning pin coordinates, and fluid port configurations. Mechanical maintenance personnel and plant engineering teams can execute rapid drop-in component changes on standard mounting pads with zero modifications to existing stack configurations.

Operating as the directional control hub within high-frequency fluid power networks, the DS3 and DS5 series feature five-chamber (or four-chamber) optimized cast iron valve body cores designed to smooth flow streams and minimize pressure drop ($\Delta P$) across tortuous galleries. At Chengyuan, zero compromises are made regarding dynamic reliability; 100% of our manufactured subplate solenoid valves successfully clear our 100% rigorous dynamic simulation test bench criteria. Subjected to full-load parameters up to 350 bar, each valve batch is monitored under 100% ED duty cycle parameters to verify spool switching response time (typically within 30-50 ms), core resistance against hydraulic binding, internal cross-port leakage thresholds under extreme thermal conditions, and coil inductive surge suppression. This ensures millions of error-free switching cycles under continuous industrial operation.

Technical Specifications

• Product Series Classification: DS3 (CETOP 03 / NG6 Size) & DS5 (CETOP 05 / NG10 Size) Direct-Acting Solenoid Operated Directional Control Valves

• Maximum Continuous Working Pressure: Main ports P, A, and B rated up to 320-350 bar; Tank port T permissible back-pressure up to 210 bar (for DC configurations) or 160 bar (for AC configurations)

• Maximum Volumetric Flow Delivery: Up to 100 L/min for DS3 series / Up to 150 L/min for DS5 series

• Recommended System Cleanliness Boundary: Strictly matching or exceeding ISO 4406 20/18/15 criteria to mitigate contaminant accumulation

• Model-Specific Nomenclature & Control Metric Dissection:

  • Part Designation: DS5-S2/12N-A230K1

  • Mounting Footprint: CETOP 05 / NG10 interface standard.

  • Spool Function S2: 3-position, 4-way valve configuration with all ports closed in the center position.

  • Design Generation Grid: Series 12 design edition.

  • Elastomeric Compounds N: Standard NBR Nitrile rubber sealing elements (compatible with mineral-based hydraulic oils).

  • Electrical Interface A230K1: Fitted with a 230V AC (50/60Hz) alternating current coil assembly, utilizing a standard K1-style plug connection matching EN 175301-803 (DIN 43650) standards.

  • Part Designation: DS3-S3/11N-D24K1/CPK

  • Mounting Footprint: CETOP 03 / NG6 interface standard.

  • Spool Function S3: 3-position, 4-way configuration with ports A and B connected to tank T, and port P blocked in the center position (allowing actuator float/unloading).

  • Design Generation Grid: Series 11 design edition.

  • Electrical Interface D24K1/CPK: Outfitted with a 24V DC direct current coil, K1-style plug connector, and enhanced with suffix “/CPK” designating upgraded surge protection or specialized environmental connector sealing.

  • Part Designation: DS3-S4/11N-D12K1

  • Mounting Footprint: CETOP 03 / NG6 interface standard.

  • Spool Function S4: 3-position, 4-way configuration with all ports (P, A, B, T) interconnected in the center position for low-pressure pump unloading.

  • Electrical Interface D12K1: Configured with a 12V DC direct current solenoid capsule, optimized for 12V DC mobile electrical grids or utility truck control manifolds, complete with a standard K1 DIN box connector.

Key Technical Advantages

• High-Tensile Shell-Molded Ductile Iron Casting Core: The valve body is cast utilizing precision shell-molding methods from premium ductile iron. Internal core flow lines are hydrostatically optimized via 3D modeling to eliminate internal fluid shearing and restriction, yielding a 15% reduction in pressure drop ($\Delta P$) compared to conventional manufacturing trims.

• Hardened Alloy Steel Spools with Precision Equalization Grooves: Spools are machined from specialized alloy steel, heat-treated for wear resistance, and precision ground to sub-micron tolerances. The outer spool sliding diameter integrates specialized micro-grooves that balance lateral fluid pressure distributions, eliminating high-pressure hydraulic binding and keeping actuation latency low.

• Heavy-Duty Oil-Immersed Wet-Armature Solenoids: The solenoid armature operates fully submerged within the system fluid, providing continuous lubrication and hydraulic cushioning while using returning oil flow to dissipate heat. The magnet wire windings are encapsulated in a vacuum-sealed epoxy matrix rated to Class H insulation ($180^\circ\text{C}$), supporting a 100% ED continuous operating factor.

• Stress-Relieved Return Springs and Multi-Component Sealing Arrays: Heavy-duty centring springs are wound from premium stress-relieved spring steel wire to ensure repeatable positioning forces over millions of cycles. The subplate interface combines high-shore O-rings with custom rigid anti-extrusion backup rings to prevent seal migration or leakage under high-frequency pressure pulsations.

Application Areas

The DS3 and DS5 series subplate-mounted solenoid valves, offering a high flow-to-pressure ratio and heavy industrial endurance, are widely deployed across automated manufacturing systems:

• Metalworking Machinery & Metallurgical Shifting Lines: Main directional control for hydraulic stamping presses, CNC press brakes, die-casting machinery, scrap metal shears, and steel mill rolling machinery blocks.

• Plastics & Rubber Processing Machinery: Clamping and injection cylinder actuation modules for plastic injection molding machinery and multi-station rubber vulcanization presses.

• Industrial Automation & Material Handling Platforms: Automated automotive assembly line grippers, heavy-duty cargo lifts, hydraulic scissor lifts, and high-cycle warehouse palletizing systems.

Expert Maintenance Tips

• Never Energize Solenoid Capsules Prior to Priming the Tank Circuit: Wet-armature capsules require fluid filling to provide internal damping and lubrication. Prior to initial system commissioning, ensure the hydraulic manifolds and T-drain circuits are fully primed with clean oil and all air pockets are bled. Avoid prolonged dry cycling or electrical actuation of the coils when the circuit is dry, as this will lead to severe metal friction or premature capsule failure.

• Enforce Cross-Symmetrical Torque Sequencing Using a Torque Wrench: Subplate surface sealing integrity depends on uniform compression. Always utilize a calibrated torque wrench to tighten the fastening bolts in a cross-symmetrical pattern over 2 to 3 progressive stages (target 5 N·m for DS3, and 8-9 N·m for DS5). Uneven or excessive tightening torque can distort the precision valve bore, causing the spool to bind or fail to return.

• Strictly Monitor Tank Port Back-Pressure Thresholds: To protect the armature assembly, ensure that transient pressure spikes inside the T-line never exceed the maximum permissible back-pressure specification (noted up to 210 bar for DC coils). Route the main return line directly to the reservoir rather than linking it with high-impulse return headers to prevent back-pressure waves from deforming or bursting the solenoid tube.