Duplomatic DSPE 7-C150 Proportional Valve & DS3 DS5 Solenoid Directional Valve

The DS3, DS5, and DSPE 7 valve series by Chengyuan Hydraulic are high-performance electro-hydraulic control components fully compatible with Duplomatic standards. This range includes direct-acting solenoid valves (DS3/DS5, CETOP 03/05) and high-performance pilot-operated proportional valves (DSPE 7, CETOP 07). Specifically, the DSPE 7-C150 offers precise electronic proportional control of flow and pressure for demanding hydraulic circuits. Every unit is subjected to 100% simulated condition testing before shipping, ensuring reliable performance under high-pressure and high-frequency switching. We guarantee 100% original-place interchangeability with OEM components.

Technical Specifications :

• Core Model Code: DSPE 7-C150/20N-II/D24K1

• Size Standards: CETOP 07 (DSPE 7), CETOP 03 (DL3/DS3), CETOP 05 (DS5)

• Max Operating Pressure: 35 MPa (350 bar)

• Max Backpressure on T-Port: 21 MPa (210 bar)

• Max Rated Flow (DSPE 7): 300 L/min (C150 spool)

• Control Voltages: D24 (24V DC) / A230 (230V AC)

• Electrical Connection: DIN 43650 standard (K1)

• Spool Functions: S2 (Closed center), TA (Two-position), C150 (Proportional control)

• Seals: NBR (Standard for mineral oils)

Key Technicl Advantages:

• Superior Proportional Linearity: For the DSPE 7-C150, precision-lapped spools ensure minimal hysteresis. The high correlation between input current and output flow provides ultra-precise control for complex machinery.

• Heavy-Duty Wet Solenoid Design: The oil-immersed armature provides superior heat dissipation and cushioning during shifting. This reduces mechanical shock and significantly extends the service life of the solenoid coils.

• Low Pressure Drop Flow Paths: The valve body casting is optimized via CFD (Computational Fluid Dynamics) to minimize turbulence. This results in a 15% lower pressure drop compared to standard aftermarket valves, reducing overall system heat.

• Seamless Interchangeability: Fully compliant with international CETOP standards. All mounting patterns and pilot configurations match the original Duplomatic valves, allowing for immediate replacement without manifold modifications.

Application Areas:

• Industrial Machine Tools: Directional and flow regulation in CNC press brakes, die-casting machines, and injection molding equipment.

• Metallurgical Equipment: Velocity control for continuous casting lines and hydraulic shearing systems in steel mills.

• Large-Scale Presses: Main pilot control for heavy-duty forging hydraulic presses.

Expert Maintenance Tips:

• Pilot Circuit Cleanliness: For the DSPE 7 pilot proportional valve, maintain fluid cleanliness at or above ISO 4406 18/16/13 to prevent particles from clogging the sensitive pilot orifices.

• Voltage Stability: Ensure the D24K1 DC voltage remains within ±10% of the nominal value. Over-voltage causes overheating, while under-voltage can lead to incomplete shifting.

• Drain Configuration: For II (internal pilot/internal drain) configurations, monitor the backpressure on the T-port. If backpressure exceeds limits, switch to an external drain to maintain pilot stability.