Duplomatic DS5 & DSP7 Solenoid Valve | DS5-TA DS5-S2 | DSP7-S12 DSP7-S6 | Directional Valve

The DS5 and DSP7 Series directional control valves from Chengyuan Hydraulic are high-performance hydraulic components fully compatible with Duplomatic industry standards. The DS5 series is designed for systems with flow rates up to 150 L/min, while the pilot-operated DSP7 series manages up to 300 L/min, making it the preferred choice for large presses and heavy machinery. For core models like DS5-TA/12N (Spring offset) and DSP7-S12/20N (Electro-hydraulic pilot), we utilize high-strength cast iron bodies and wet-pin solenoids. Every valve undergoes 100% simulated full-load condition testing to ensure switching reliability under high pressure (350 bar), guaranteeing 100% original-place interchangeability.

Technical Specifications :

• Series Model: DS5 Series (Direct Acting) / DSP7 Series (Pilot Operated)

• Mounting Interface: CETOP 05 (DS5) / CETOP 07 (DSP7)

• Max Operating Pressure: 350 bar (35 MPa)

• Max Flow Rate (DS5): 150 L/min

• Max Flow Rate (DSP7): 300 L/min

• Solenoid Voltage: D24K1 (24V DC) / A230K1 (230V AC) / A110 (110V AC)

• Sealing: N (NBR, standard) / V (Viton, optional)

• Pilot Configuration (DSP7): IE (Internal Pilot, External Drain) / II (Internal Pilot, Internal Drain)

• Electrical Connection: DIN 43650 Plug (K1)

Key Technical Advantages:

• Superior Flow Capacity: The DS5 internal flow galleries are optimized to minimize pressure drop, allowing flow rates that exceed standard ratings for Size 10 valves. The DSP7 pilot structure ensures smooth, shock-free shifting even at flow rates up to 300 L/min via precise main spool stroke control.

• Wet-Pin Solenoid Technology: The armature operates immersed in oil, providing excellent heat dissipation and oil-damping for reduced mechanical wear and noise. Coils can be rotated 360° for flexible on-site wiring.

• Pilot Control Versatility (DSP7): The DSP7 series supports multiple pilot and drain options. For instance, the IE configuration allows users to utilize main circuit pressure for pilot driving while draining through an independent line, ensuring precise shifting even with fluctuating backpressure.

• Precision Fitting & Contamination Resistance: Spools and bores are CNC-ground to maintain tight clearances, significantly reducing internal leakage. This precision fit also provides excellent anti-sticking properties, ensuring reliable operation even in environments with less-than-ideal fluid cleanliness.

Application Areas:

• Metal Forming: Heavy-duty hydraulic presses, bending machines, and stamping lines.

• Plastics Industry: Main control systems for large injection molding machines.

• Marine & Energy: Ship lift systems and hydraulic servo power units for power plants.

Expert Maintenance Tips:

• Pilot Pressure Verification (DSP7): For pilot-operated valves, ensure pilot pressure is at least 10-12 bar. If the main system pressure is too low (e.g., during pump startup), external pilot control is recommended.

• Manual Override Handling: Valves are equipped with manual overrides. During commissioning or power failures, avoid using sharp tools to strike the button to prevent damage to the internal seals and reset springs.

• Filtration Standards: To ensure long-term service life, the system must include return filtration of better than 10μm, maintaining fluid cleanliness to ISO 4406 18/16/13 standards.