Vickers DG4V-3 Series Solenoid Directional Valve | DG4V-3-6C DG4V-3-0A

The DG4V-3 Series solenoid directional control valves manufactured by Chengyuan Hydraulic are high-performance subplate-mounted components engineered to meet the stringent industrial standards of Vickers. This series focuses on universal configurations such as DG4V-3-6C-M-U7-H-52-K, DG4V-3-0A-M-P7-H-7-52, and the specialized DG4V-3-6C-M-P2-V-7-56.

As the industry standard for NG6 (CETOP 3) interface valves, the DG4V-3 features an advanced “wet-armature” solenoid design for superior heat dissipation and quiet switching. Chengyuan ensures 100% original-place interchangeability regarding mounting patterns (ISO 4401-03), electrical connections, and flow-pressure performance. Every valve is subjected to 100% dynamic load testing before shipment, focusing on spool reset accuracy and internal leakage thresholds at pressures up to 350 bar, providing reliable logic control for machine tools and automation machinery.

Technical Specifications :

• Brand Compatibility: Vickers DG4V-3 Series Replacement

• Spool Function Codes:

  • 6C: 3-position 4-way, closed center (P, T, A, B blocked)

  • 0A: 2-position 4-way, spring offset (P-B, A-T)

• Design Sequence: 52 Series / 56 Series

• Max Operating Pressure (P, A, B Ports): 350 bar (5075 PSI)

• Max Tank Port Back-Pressure: 210 bar (3045 PSI)

• Rated Flow Rate: Up to 80 L/min (Depending on spool and $\Delta P$)

• Solenoid Voltage Options:

  • U7: 120V AC 60Hz

  • P7: 110V AC 50Hz

  • P2: 24V DC (Stable DC drive)

• Electrical Interface: DIN 43650 ISO 4400 Plug-in (H or K Type)

• Manual Override: Push-button type with manual override (Code M)

• Seal Material Matrix: Standard Buna-N (NBR), optional Viton (Code V)

Key Technical Advantages:

• CFD-Optimized Flow Galleries: The internal valve body galleries are precision-engineered via fluid dynamics simulation to minimize turbulence. This reduces the pressure drop ($\Delta P$) across the valve, leading to lower heat generation and improved system efficiency.

• Wet-Armature Solenoid Technology: Utilizing a wet-pin structure where the armature operates submerged in hydraulic oil. This provides natural lubrication and a cushioning effect, significantly extending the solenoid’s service life and dampening switching noise/shocks.

• Wear-Resistant Precision Spool Fit: Spools are heat-treated to $HRC 60-62$ and precision-ground to a clearance fit of 2-4 microns. This ensures consistent spool mobility even at 350 bar while maintaining ultra-low internal leakage rates.

• Modular Coil Replacement System: Coils are secured with a simple knurled nut, allowing for rapid voltage changes or maintenance without disconnecting the hydraulic lines. This minimizes downtime and simplifies field service requirements.

Application Areas:

• Machine Tool Industry: Directional control for CNC lathe clamping, feeding, and tool post indexing.

• Injection Molding Machinery: Sequence control for mold opening/closing and ejector movements.

• Automated Production Lines: Power distribution for industrial pick-and-place units and compact power units.

Expert Maintenance Tips:

• Coil Compatibility Protocol: Always verify the voltage code (e.g., P2 for 24V DC) before energizing. AC coils will burn out instantly if energized while not properly seated on the guide tube; ensure electrical alignment.

• Filtration Maintenance: To prevent spool jamming, maintain system oil cleanliness at or above ISO 4406 20/18/15. Most sticking issues are caused by microscopic metallic debris entering the tight spool-to-bore clearances.

• Manual Override Best Practices: The manual override (M type) is intended for commissioning or emergency use only. Avoid hitting the override pin with heavy tools, as this can damage the internal rod seals and lead to external oil leaks.