Duplomatic DS5 Series Solenoid Valve | DS5-S9/13N-D24K1 | DS3 CETOP 03/05

The DS3 and DS5 Series solenoid-operated directional control valves by Chengyuan Hydraulic are high-performance spool valves fully compatible with Duplomatic technical standards. Available in CETOP 03 (DS3) and CETOP 05 (DS5) mounting patterns, these valves include core models like DS5-S9/13N-D24K1/F/CM. Featuring a four-chamber body design and powerful wet-armature solenoids, these valves offer efficient and reliable oil flow switching. We have optimized the internal flow paths to minimize pressure drop across the valve. All directional valves are 100% interchangeable with original units and undergo 100% simulated condition testing for switching frequency and internal leakage to ensure stability in demanding industrial cycles.

Technical Specifications:

• Core Models: DS5-S9, DS5-S3, DS3-S3, DS3-TA/12N

• Mounting Standard: CETOP 05 (DS5) / CETOP 03 (DS3)

• Max Operating Pressure: $32\text{ MPa (320 bar / 4600 psi)}$

• Max Flow (DS5): $120\text{–}150\text{ L/min}$ (Depending on spool type)

• Max Flow (DS3): $60\text{–}100\text{ L/min}$

• Control Voltage: D24 (24V DC), A230 (230V AC), etc.

• Seal Material: NBR (Standard) or FKM (High temp)

• Protection Class: IP65 (with standard connector)

• Emergency Feature: Built-in Manual Override

Key Technical Advantages:

• Optimized Flow Paths (Low Pressure Drop): The DS5 series valve body features cast internal galleries designed for minimum friction. At rated flow, the pressure drop is approximately $15\%$ lower than conventional valves, significantly reducing system heat generation.

• Heavy-Duty Wet-Armature Solenoids: The solenoid plunger is fully immersed in oil, providing a damping effect and superior heat dissipation. This eliminates mechanical impact noise and drastically extends coil life. Coils are rated for $100\%$ duty cycle without risk of burnout.

• Precision Centering Spring Assembly: Utilizing fatigue-tested reset springs, the spool is guaranteed to return to the neutral position quickly and accurately upon power loss. The spool is micro-honed to a tight fit with the valve bore, ensuring ultra-low internal leakage ($\le 3\text{ cm}^3\text{/min}$ @ 21MPa).

• Environmental Durability: The valve body is phosphated and the solenoid housings are zinc-plated for excellent corrosion resistance. For high-vibration environments, internal fastening structures are reinforced to ensure reliability during high-frequency switching.

Application Areas:

• Machine Tools: CNC turret positioning and clamping mechanism control.

• Plastic Machinery: Logic control for clamping and injection circuits in injection molding machines.

• Industrial Presses: Directional control in hydraulic manifold blocks for oil presses.

Expert Maintenance Tips:

• Voltage Stability: Ensure the solenoid operating voltage stays within $\pm 10\%$ of the rated value. Low voltage can cause insufficient force leading to spool sticking, while high voltage leads to coil overheating.

• Mounting Surface Flatness: The CETOP mounting subplate should have a flatness better than $0.01/100\text{ mm}$ and a roughness of $Ra \le 0.8\mu\text{m}$. An uneven surface can distort the valve body and cause spool malfunction.

• Fluid Cleanliness: Directional valves are highly sensitive to oil contamination, which is the primary cause of spool jamming. High-efficiency filters with a rating of $10\mu\text{m}$ or better are essential.