DG4V-3 Eaton Vickers Solenoid Valve 80 L/min 350 Bar

Product Overview

The DG4V-3 series solenoid directional control valves (including models DG4V-3-2C-M-P7-H-7-56 and DG4V-5-6CJ-M-U-H6-20) are manufactured to original Eaton Vickers technical standards, covering two product families: size 03 (NG6 / CETOP 3 / ISO 4401-03) direct-acting solenoid directional valves and size 05 (NG10 / CETOP 5 / ISO 4401-05) pilot-operated solenoid directional valves. The DG4V-3 series uses wet armature solenoids to directly shift the spool, used for directing and stopping flow at any point in a hydraulic system, providing precise directional control of hydraulic actuators.

The DG4V-3-2C-M-P7-H-7-56 is a high-performance DG4V-3 series valve with 60 design, spool type 2C (all ports closed in center), equipped with 24 VDC wet armature solenoid and P7 electrical interface, with maximum flow of 80 L/min (21 USgpm) and P/A/B port pressure rating of 350 bar (5075 psi). The DG4V-5-6CJ-M-U-H6-20 is a DG4V-5 series size 05 (NG10) pilot-operated solenoid directional valve with spool type 6CJ (P blocked, A & B to tank in center), equipped with 24 VDC solenoid, maximum flow of 120 L/min (32 USgpm), P/A/B port pressure rating of 315 bar (4500 psi), and T port rating of 160 bar.

This product is dimensionally and functionally identical to the original Eaton Vickers valves, offering true drop-in interchangeability for direct replacement of same-specification OEM valves without modifying piping systems or control programs. 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-3-2C-M-P7-H-7-56 / DG4V-5-6CJ-M-U-H6-20

• Product Series: DG4V-3 (Size 03 / NG6 / CETOP 3 / ISO 4401-03); DG4V-5 (Size 05 / NG10 / CETOP 5 / ISO 4401-05)

• Design Series: 60 Design (DG4V-3) / 20 Design (DG4V-5)

• Spool Type: 2C (All ports closed in center, DG4V-3-2C) / 6CJ (P blocked, A & B to tank in center, DG4V-5-6CJ)

• Design: DG4V-3 direct-acting subplate mounting solenoid valve; DG4V-5 pilot-operated solenoid valve

• Mounting Pattern: DG4V-3 conforms to ISO 4401-03 (CETOP 3 / NFPA D03); DG4V-5 conforms to ISO 4401-05 (CETOP 5 / NFPA D05)

• Installation Position: Any

Hydraulic Parameters (DG4V-3-2C-M-P7-H-7-56)

• Maximum Flow Rate: 80 L/min (21 USgpm)

• Rated Pressure: 315 bar (4570 psi)

• 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: 10 – 500 mm²/s (cSt)

• Fluid Temperature Range: -20°C to +80°C

• Filtration: ISO 4406 18/16/13 or better

• Duty Cycle: Continuous (ED = 100%)

• Response Time (DC solenoid): Energizing 25-40 ms / De-energizing 20-30 ms

• Internal Leakage (max): 3-5 drops/min @ 315 bar

Hydraulic Parameters (DG4V-5-6CJ-M-U-H6-20)

• Maximum Flow Rate: 120 L/min (32 USgpm)

• Rated Pressure: 315 bar (4500 psi)

• Maximum Operating Pressure (Ports P/A/B): 350 bar (5075 psi)

• Maximum Tank Port Pressure (Port T): 160 bar (2325 psi) for DC solenoid

• Spool Type: 6CJ (P blocked, A & B to tank in center)

• Design: Pilot-operated two-stage solenoid directional valve

Electrical Parameters (DG4V-3-2C-M-P7-H-7-56)

• Supply Voltage: 24 VDC (H7)

• Solenoid Type: Wet armature solenoid with interchangeable coil

• Coil Power Consumption: 16-20 W (DC)

• Coil Winding Insulation: Class H

• Electrical Connector: P7 (ISO 4400 / DIN 43650 connector)

• Protection Class: IP65 (with standard connector)

• Reverse Polarity Protection: Yes

Electrical Parameters (DG4V-5-6CJ-M-U-H6-20)

• Supply Voltage: 24 VDC (H6)

• Solenoid Type: Wet armature solenoid with interchangeable coil

• Coil Power Consumption: 38 W (DC)

• Electrical Connector: U (ISO 4400 / DIN 43650 connector)

• Protection Class: IP65

• T Port Rating: 160 bar (DC)

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

• DG4V-3: approx. 2.3 kg

• DG4V-5: approx. 4.8 kg

Key Technical Advantages

1. Wet Armature Solenoid Design for High Reliability
The DG4V-3/DG4V-5 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. The increased solenoid holding force and matching stiffer return springs significantly improve switching reliability and service life.

2. 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.

3. 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. The DG4V-5 series features solid cast bodies and cored passages for maximum strength and minimal pressure drop.

4. Pilot-Operated Two-Stage Control with High Flow Capacity (DG4V-5 Series)
The DG4V-5-6CJ-M-U-H6-20 employs a pilot-operated two-stage control structure where the main stage spool is positioned by pilot pressure, achieving flow capacity up to 120 L/min. The main stage features spring-centered design, ensuring safe spool return upon pilot pressure failure. The T port is rated to 160 bar, suitable for industrial hydraulic systems with high return line back pressure.

5. 100% Simulated Working Condition Testing and Drop-in Interchangeability
Every valve undergoes 100% bench testing prior to shipment, covering 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 valves, enabling direct drop-in replacement without modifying piping or control programs. The DG4V-3 and DG4V-5 series directly interchange with Rexroth 4WE6/4WE10, Yuken DSG-01/DSG-03, Parker D1VW/D3VW series valves, achieving cross-brand drop-in replacement.

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: Excavators, loaders hydraulic circuits (high T port back pressure scenarios)

• 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

• Wind Power Generation: Pitch control system hydraulic directional control

Expert Maintenance Tips

Installation Guidelines

1. The DG4V-3/DG4V-5 series can be mounted in any position. Mounting surface flatness must be ≤ 0.05 mm. DG4V-3 uses M5×45mm bolts; DG4V-5 uses M6×55mm bolts. Tighten diagonally in stages to the specified torque value.

2. 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.

3. 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

1. Fluid Cleanliness Management: Maintain system fluid cleanliness at ISO 4406 18/16/13 or better. Check fluid particulate contamination every 500 operating hours and replace filter elements and hydraulic fluid when contamination exceeds limits.

2. Solenoid Electrical Inspection: Periodically inspect the 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.

3. Shifting Performance Verification: Periodically check each position for smooth shifting and absence of binding. If shifting response becomes sluggish or internal leakage exceeds 5 drops/min @ 315 bar, inspect spool wear and fluid contamination levels.

4. Seal Replacement: Standard FKM (Viton) seals provide multi-fluid compatibility. Under normal operating conditions, replace valve seals every 3,000-5,000 operating hours.

5. Pilot Valve Maintenance (DG4V-5 Series) : Periodically inspect the pilot stage for proper operation and stable pilot pressure. Pilot stage T port back pressure must not exceed 160 bar (DC solenoid). If main stage shifting is abnormal, first check the pilot valve filter for blockage.