DG5V-8-H-8C-E-VM-U-C-10 | Parker Vickers Solenoid Pilot Operated Directional Control Valve 350 Bar 700 L/min

Product Overview

The DG5V-8-H-8C-E-VM-U-C-10 is a solenoid-controlled, pilot-operated directional control valve from the Parker Hannifin Vickers DG5V-8 series. This two-stage valve features an integrally-mounted wet armature solenoid pilot valve that precisely controls the main stage spool, enabling accurate directional control of hydraulic fluid flow.

Manufactured to strict Parker Vickers original specifications, this valve delivers consistent performance in material quality, machining precision, sealing integrity, and factory testing. Every unit undergoes 100% full-load simulation testing prior to shipment, validating pressure, flow, and directional cycling performance under real-world operating conditions. The valve offers complete interchangeability with the original DG5V-8-H-8C-E-VM-U-C-10—no modifications to mounting interfaces or piping layouts are required, significantly reducing equipment downtime and retrofitting costs.

Technical Specifications 

• Model Number: DG5V-8-H-8C-E-VM-U-C-10

• Series: Parker Vickers DG5V-8

• Valve Type: Solenoid Controlled Pilot Operated Directional Control Valve

• Mounting Standard: NG25 / CETOP 8 / NFPA D08

• Mounting Method: Subplate / Manifold Mount

• Number of Positions: 3-Position

• Spool Spring Arrangement: Spring Centered

• Spool Type: Type 8 (Tandem Spool, P to T connected in center position)

• Solenoid Configuration: Double Solenoid

• Maximum Operating Pressure: 350 bar (5000 psi)

• Maximum Flow Rate: 700 L/min (185 US gpm)

• Pilot Supply: External Pilot Pressure

• Solenoid Connector: ISO 4400 (DIN 43650)

• Coil Voltage: DC (specific voltage per configuration)

• Coil Insulation Class: Class H (180°C / 356°F)

• Protection Class: IP65 (when plugged and mounted)

• Hydraulic Fluid: Mineral oil per DIN 51524 / 51525

• Recommended Viscosity: 30 to 80 cSt (139 to 371 SSU)

• Permissible Viscosity Range: 10 to 380 cSt (46 to 1761 SSU)

• Fluid Temperature Range: -20°C to +80°C (-4°F to +176°F)

• Ambient Temperature Range: -20°C to +50°C (-4°F to +122°F)

• Filtration Requirement: ISO 4406 (1999) 18/16/13 (NAS 1638: Class 7)

• Body Material: Ductile Iron

• Seal Material: Buna-N

• Weight: Approx. 16.0 kg

• Design Number: 10

Key Technical Advantages

1. Two-Stage Pilot Control for High-Flow Precision
The DG5V-8 series integrates a wet armature solenoid pilot valve with the main stage spool, enabling low-power electrical signals to control flow rates up to 700 L/min. The integrated pilot-main stage design delivers fast response and precise control, ideal for high-frequency directional switching applications.

2. Type 8 Tandem Spool with Center-Position Energy Savings
This valve features a Type 8 tandem spool that connects P to T in the center position, enabling pump unloading. This design significantly reduces standby energy consumption, minimizes hydraulic fluid temperature rise, and extends pump and seal service life—an optimal choice for energy-efficient hydraulic systems.

3. High Pressure Rating with Minimized Pressure Drop
Rated for 350 bar (5000 psi) continuous operation, the valve is suitable for medium-to-high pressure hydraulic systems. Optimized flow passages ensure minimal pressure drop across P-A, P-B, A-T, and B-T paths, reducing power loss and improving overall system efficiency.

4. Ductile Iron Body with Precision Machining for Durability
The valve body is constructed from high-strength ductile iron, offering excellent impact toughness and wear resistance. Main stage spools and valve bodies are precision-ground to exacting tolerances, ensuring consistent sealing performance and low internal leakage. Every valve undergoes 100% full-load simulation testing before shipment.

5. Flexible Pilot and Drain Configurations
DG5V series valves support both internal and external pilot pressure supply, as well as internal and external pilot drain options. This flexibility enables seamless integration into a wide variety of hydraulic circuit designs, accommodating complex system control requirements.

Application Areas

• Injection Molding Machinery: Clamping, injection, and ejection directional control

• Die Casting Equipment: High-frequency directional switching with high flow capacity

• Construction Machinery: Excavator and loader implement hydraulic systems

• Marine Hydraulic Systems: Steering gear and winch directional control

• Metallurgical Equipment: Rolling mill hydraulic servo systems

• Machine Tool Hydraulics: Directional control and feed regulation in machining centers

• Concrete Pump Trucks: Pumping direction control

Expert Maintenance Tips

1. Fluid Cleanliness Management
The DG5V-8 series requires fluid cleanliness to ISO 4406 18/16/13 or NAS 1638 Class 7. Install a return-line filter with ≤10μm absolute filtration upstream of the valve and monitor fluid contamination regularly. Contaminated fluid is the leading cause of spool sticking and directional failure.

2. Verify Pilot Pressure Supply
When using external pilot supply (E code), ensure the pilot pressure source delivers stable pressure above the valve’s minimum pilot pressure requirement. Insufficient pilot pressure will prevent full main stage spool shifting, resulting in throttling heat generation or system malfunction.

3. Solenoid Coil Replacement Precautions
DG5V series allows solenoid coil replacement without disconnecting hydraulic lines. Always verify that replacement coils match the original voltage and frequency specifications, and ensure connector seals are intact to maintain IP65 rating.

4. Mounting Surface and Seal Inspection
Prior to installation, inspect the subplate mounting surface for flatness and surface finish per CETOP 8 / NFPA D08 standards. When replacing O-rings, use original specification Buna-N seals and avoid scratching seal grooves during installation.

5. First-Start Commissioning Procedure
Before initial system startup, perform an air-bleed cycle at reduced pressure (approximately 20-30 bar) to purge air from the valve body and lines. Cycle the valve 5-10 times before gradually increasing to operating pressure—this prevents cavitation damage to spool surfaces.