Product Overview
The DG4V-3 series solenoid operated directional valve (including models DG4V-3S-6C-M-U-G5-60 and DG4V-3-2C-M-P7-H-7-56) is manufactured to original Eaton Vickers technical standards. Belonging to the DG4V-3 series with size 03 (NG6 / CETOP 3 / ISO 4401-03), this valve features a wet armature solenoid operated, subplate mounting design conforming to ISO 4401-03 mounting standards. The valve is used for directing and stopping flow at any point in a hydraulic system, providing precise directional control of hydraulic actuators.
The DG4V-3 series is available in two performance levels: the high-performance DG4V-3 with flows up to 80 L/min (21 USgpm), and the standard-performance DG4V-3S with flows up to 40 L/min (10.5 USgpm), both rated at 350 bar (5075 psi). The DG4V-3S series features a tank port pressure rating of 210 bar (3045 psi), making it ideal for mobile equipment applications with high return line back pressure.
This product is dimensionally and functionally identical to the original Eaton Vickers DG4V-3 series valve, offering true drop-in interchangeability for direct replacement of same-specification OEM valves. Every unit undergoes 100% bench testing under simulated working conditions, including rated pressure holding, directional response verification, internal leakage measurement, and solenoid response characterization.
Technical Specifications
General Specifications
Model: DG4V-3S-6C-M-U-G5-60 / DG4V-3-2C-M-P7-H-7-56
Product Series: DG4V-3 / DG4V-3S (Size 03 / NG6 / CETOP 3 / ISO 4401-03)
Design Series: 60 Design
Spool Type: 6C (P blocked, A & B open to T in center) / 2C (All ports closed in center)
Design: Direct-acting, subplate mounting solenoid directional valve with wet armature solenoids
Mounting Pattern: ISO 4401-AB-03-4-A / CETOP 3 / NFPA D03
Installation Position: Any
Hydraulic Parameters (DG4V-3 High Performance)
Maximum Flow Rate: 80 L/min (21 USgpm)
Maximum Operating Pressure (Ports P/A/B): 350 bar (5075 psi)
Maximum Tank Port Pressure (Port T): 210 bar (3045 psi)
Hydraulic Fluid: Mineral-based and water-containing hydraulic fluids
Viscosity Range: Recommended 20 – 380 mm²/s (cSt)
Fluid Temperature Range: -20°C to +80°C
Filtration: ISO 4406 19/17/14
Duty Cycle: Continuous (ED = 100%)
Hydraulic Parameters (DG4V-3S Standard Performance)
Maximum Flow Rate: 40 L/min (10.5 USgpm)
Maximum Operating Pressure (Ports P/A/B): 350 bar (5075 psi)
Maximum Tank Port Pressure (Port T): 210 bar (3045 psi)
Electrical Parameters
Supply Voltage: 12 VDC (G5) / 24 VDC (H7)
Voltage Tolerance: Minimum 90% rated voltage
Solenoid Type: Wet armature solenoid with interchangeable coil
Coil Winding Insulation: Class H
Coil Encapsulation: Class F
Electrical Connector: ISO 4400 / DIN 43650
Protection Class: IP65 (with standard connector)
Response Time (DC solenoid): Energizing 60 ms / De-energizing 40 ms (2C spool, 20 L/min, 175 bar)
Reverse Polarity Protection: Yes
Materials & Construction
Valve Body: High-strength cast iron
Control Spool: Carburized steel, precision ground with milled metering notches
Seals: FKM (Viton) as standard
Surface Treatment: Phosphating / anti-corrosion coating
Weight
Key Technical Advantages
1. Wet Armature Solenoid Design for High Reliability
The DG4V-3 series employs a wet armature solenoid design where the armature operates in hydraulic fluid, effectively reducing shifting impact noise and wear. Solenoid coils can be changed quickly and easily without leakage from the hydraulic system, significantly reducing downtime and maintenance costs. The product has been tested over 20 million cycles, demonstrating proven fatigue life and endurance.
2. Precision Spool Machining with Milled Metering Notches
The control spool is precision-ground from carburized steel. Milled metering notches on the spool enable precise control of flow rate change as the spool is shifted. Combined with improved manufacture of spool and bores, internal leakage is reduced, minimizing power losses and increasing system efficiency.
3. High Power-to-Weight Ratio with Compact System Design
The DG4V-3 series is designed to provide efficient control of greater hydraulic powers without increasing solenoid power consumption. Higher power/weight and power/size ratios result in cost and space savings. When used with Vickers SystemStak™ valves and multi-port subplates, compact and cost-effective system designs are achieved. Multi-fluid capability eliminates the need to change seals.
4. Soft Shift Function for Minimal Hydraulic Shock
The DG4V-3 soft shift model series uses an optimized damping orifice to achieve a guaranteed soft shift function, providing smoother control of actuator acceleration and deceleration than conventional solenoid valves. The result is minimum hydraulic shock, more reliable systems with longer component life, and less downtime. The soft shift function is offered with the higher flow and pressure ratings expected from the high-performance DG4V-3 valves.
5. 100% Simulated Working Condition Testing and Drop-in Interchangeability
Every DG4V-3 series valve undergoes 100% bench testing prior to shipment, covering 350 bar rated pressure holding, directional response time measurement, internal leakage verification, and solenoid response characterization. Mounting dimensions, port positions, electrical interfaces, and performance curves are strictly matched to the original Eaton Vickers valve, enabling direct drop-in replacement without modifying piping or control programs, significantly reducing Total Cost of Ownership (TCO).
Application Areas
Injection Molding Machines: Mold opening/closing direction control, ejector system control
Hydraulic Presses: Main cylinder directional control, fast/slow speed switching
Machine Tools: CNC hydraulic clamping systems, tool changer control
Construction Machinery: Mini excavators, loader auxiliary hydraulic circuits (DG4V-3S models)
Wind Power Generation: Pitch control system hydraulic directional control
Metallurgical Equipment: Continuous casting machines, rolling mill auxiliary directional control
Marine Hydraulics: Steering gear control, deck machinery hydraulic systems
Testing Equipment: Material testing machine hydraulic loading direction control
Expert Maintenance Tips
Installation Guidelines
The DG4V-3 series can be mounted in any position. Mounting surface flatness must be ≤ 0.05 mm. Tighten mounting bolts diagonally in stages to the specified torque value.
Thoroughly flush all piping circuits before installation. Ensure no welding slag, metal chips, or particulate contaminants remain. Prior to first operation, circulate the system through a 10 μm filter element for a minimum of 30 minutes.
Electrical connections must use connectors conforming to ISO 4400 / DIN 43650 to maintain IP65 protection. Control signal cables should be shielded, with the shield grounded at one end.
Routine Maintenance Procedures
Fluid Cleanliness Management: Maintain system fluid cleanliness at ISO 4406 19/17/14 or better. Check fluid particulate contamination every 500 operating hours and replace filter elements and hydraulic fluid when contamination exceeds limits.
Solenoid Electrical Inspection: Periodically inspect the DIN 43650 connector for seal integrity and terminal tightness. Measure coil resistance and replace the coil if deviation exceeds ± 10%. Coil insulation is Class H; monitor for abnormal temperature rise.
Shifting Performance Verification: Periodically check each position for smooth shifting and absence of binding. If shifting response becomes sluggish or internal leakage increases, inspect spool wear and fluid contamination levels.
Seal Replacement: Standard FKM (Viton) seals provide multi-fluid compatibility without the need to change seals. Under normal operating conditions, replace valve seals every 3,000-5,000 operating hours.
Tank Port Back Pressure Management: Tank port back pressure must not exceed 210 bar (3045 psi). The DG4V-3S model is specifically designed for high tank line pressure applications with a T port rating of 210 bar, making it the ideal choice for mobile equipment with high return line back pressure.
