Parker D1VW Series Solenoid Valve | D1VW020DNJW91 D1VW020HNJWP91 | Directional Control Valve

The D1VW Series Solenoid Directional Control Valves by Chengyuan Hydraulic are high-performance NG06 (CETOP 03) valves designed for industrial hydraulic systems. These valves offer 100% original-place interchangeability with Parker D1VW020 series. Featuring a robust five-chamber valve body, the D1VW minimizes pressure drop and enhances structural integrity under high pressure. Each valve is subjected to 100% simulated condition testing, ensuring precise switching and reliable performance at continuous pressures up to $350\text{ bar}$. It is the ideal solution for injection molding machines, machine tools, and diverse industrial hydraulic power units.

Technical Specifications :

• Representative Models: D1VW020DNJW91 / D1VW020DNJDLJ591 / D1VW020HNJWP91

• Standard Interface: NG06 / CETOP 03 / NFPA D03

• Spool Configuration: 020 (3-position, 4-way, all ports blocked in center) / Multiple options available

• Max Operating Pressure (P/A/B): $350\text{ bar (5075 psi)}$

• Max Tank Pressure (T): $210\text{ bar}$ (DC) / $140\text{ bar}$ (AC)

• Maximum Flow Rate: $80\text{ L/min (21 GPM)}$

• Response Time: Energizing approx. $30\text{–}45\text{ ms}$; De-energizing approx. $20\text{–}40\text{ ms}$

• Solenoid Type: Wet pin design with manual override

• Enclosure Rating: IP65 (depending on connector)

Key Technical Advantages:

• Optimized Five-Chamber Casting: The advanced five-chamber body design provides larger flow cross-sections compared to standard three-chamber bodies. This significantly reduces pressure drop ($\Delta P$) and minimizes heat generation within the hydraulic system.

• Self-Lubricating Wet Pin Solenoids: The solenoid cores operate submerged in hydraulic oil, eliminating friction at dynamic seals and providing superior cooling. This design drastically extends the life of the coils under high-frequency operation.

• Precision-Ground Spool and Bore: The spool and body are induction-hardened and precision-lapped to exacting tolerances. This ensures minimal internal leakage at $350\text{ bar}$, improving the positioning accuracy of actuators.

• Versatile Electrical Connections: Compatible with DIN connectors, lead wires, and various voltage ratings (24VDC, 110VAC, 230VAC). Soft-shift options are also available to reduce hydraulic shock in sensitive systems.

Application Areas:

• Machine Tools: Tool turret indexing and clamping controls.

• Plastics Machinery: Mold adjustment and core-pulling circuits in injection molding machines.

• General Industry: Hydraulic balers, lifting platforms, and compact Hydraulic Power Units (HPUs).

Expert Maintenance Tips:

• Mounting Flatness: Ensure the mounting surface flatness is within $0.01/100\text{mm}$. Tighten bolts to $11\text{ Nm}$ using a diagonal sequence to prevent body distortion and spool binding.

• Electrical Surge Protection: It is recommended to install surge suppression in the solenoid circuit to protect the coils and electronic controllers from inductive voltage spikes.

• Oil Quality Management: Since the wet pin solenoids contain system oil, severely degraded oil can leave deposits on the core. Maintain system cleanliness at ISO 4406 20/18/15 or better for optimal performance.