DG4V-3S-2C-M-U-B5-60 Eaton Vickers Directional Valve D03 350 bar

Product Overview

The DG4V-3S-2C-M-U-B5-60 and DG4V-3S-8C-VM-U-B5-61 are direct-operated solenoid directional control valves from Eaton Vickers’ (now Danfoss Power Solutions) DG4V-3S series. This series represents the standard performance specification (DG4V-3S) with a maximum flow of 40 L/min, while the DG4V-3 series is the high-performance variant (up to 80 L/min).

The DG4V-3S series features direct-operated, wet armature, spool-type 4/3 directional valves. In the de-energized condition, the control spool is held in the center position by return springs. When energized, the wet armature solenoid acts via the plunger on the control spool, pushing it to the required end position. The DG4V-3S-60 Design series features an optimized damping orifice design that delivers a soft shift function, minimizing hydraulic shock and improving system reliability.

The DG4V-3S-2C-M-U-B5-60 features a 2C-type spool—closed center with all ports blocked—ideal for load-holding applications with double-acting cylinders.

The DG4V-3S-8C-VM-U-B5-61 features an 8C-type spool—tandem center with P→T connected and A/B ports blocked—ideal for circuits requiring actuator float or system unloading. This model is from the 61 Design series and features a VM-type water-resistant manual override.

As a direct OEM-replacement solution, this valve maintains 100% mechanical and functional interchangeability with the original Eaton Vickers unit. Every valve undergoes rigorous simulation testing—including pressure cycling, thermal variation, and full-stroke endurance validation—to guarantee factory-grade performance.

Technical Specifications

DG4V-3S Series General Specifications (NG6 / D03)：

• Brand: Eaton Vickers (Danfoss Power Solutions)

• Valve Type: Direct operated solenoid directional spool valve

• Performance Specification: Standard Performance

• Nominal Size: NG6 / NFPA D03

• Mounting Interface: ISO 4401-AB-03-4-A / CETOP 3 / NFPA D03

• Mounting Type: Subplate/Manifold mounting

• Valve Configuration: 4-way, 3-position

• Max. Operating Pressure: 350 bar (5075 psi)

• Max. Pressure P, A & B Ports: 350 bar (5000 psi)

• Max. Tank Port Pressure: 210 bar (3000 psi)

• Max. Flow: 40 L/min (10.5 USgpm)

• Body Material: Gray Iron

• Seal Material: Buna-N (NBR)

• Duty Cycle: Continuous; ED = 100%

• Protection Class: IP65 (when ISO 4400 coils properly plugged)

• Operating Temperature: -20°C to +70°C (-4°F to +158°F)

• Solenoid Type: Wet armature

• Weight: Double solenoid models approx. 2.2 kg (4.8 lb); single solenoid approx. 1.6 kg (3.5 lb)

DG4V-3S-2C-M-U-B5-60 Differentiated Parameters：

• Model: DG4V-3S-2C-M-U-B5-60

• Spool Type: 2C (Closed Center, All Ports)

• Spring Arrangement: C – Spring centered

• Manual Override: M – Plain override

• Electrical Connection: U – ISO 4400 (DIN 43650) connector

• Coil Voltage: B5 – 110V AC (50 Hz) / 120V AC (60 Hz)

• Design Series: 60 Design

• Port Configuration: ANSI B93.9 standard (Solenoid A energizes P→A)

DG4V-3S-8C-VM-U-B5-61 Differentiated Parameters：

• Model: DG4V-3S-8C-VM-U-B5-61

• Spool Type: 8C (Tandem Center, P→T connected, A/B blocked)

• Spring Arrangement: C – Spring centered

• Manual Override: VM – Water-resistant manual override

• Electrical Connection: U – ISO 4400 (DIN 43650) connector

• Coil Voltage: B5 – 110V AC (50 Hz) / 120V AC (60 Hz)

• Design Series: 61 Design

• Port Configuration: V – European standard (Solenoid A at port A end)

Key Technical Advantages

1. Wet Armature Solenoid Design – Long Service Life and High Reliability

DG4V-3S series valves feature wet armature solenoids, with the spool fully immersed in pressure oil. This design provides cushioning effect for smooth, quiet operation even under high-pressure, high-frequency switching conditions. The immersed spool design completely eliminates friction between moving seals and plunger push rods, prevents oil leakage, and increases spool thrust. Solenoid coils feature Class H insulation with Class F encapsulation.

2. Optimized Soft Shift Function – Reduced Hydraulic Shock

The DG4V-3(S)-60 Design series features an optimized damping orifice design that delivers a soft shift function. Milled metering notches on the spool enable precise control of flow rate change during shifting, providing smoother actuator acceleration and deceleration control than conventional solenoid valves, minimizing hydraulic shock, improving system reliability, and extending component life.

3. 2C Closed Center Spool – Superior Load-Holding Capability

The DG4V-3S-2C-M-U-B5-60 features a 2C-type spool with all ports (P, A, B, T) blocked in the center position. This center condition ensures reliable actuator locking when solenoids are de-energized, making it particularly suitable for load-holding applications with double-acting cylinders.

4. 8C Tandem Center Spool – Actuator Float and System Unloading

The DG4V-3S-8C-VM-U-B5-61 features an 8C-type spool with P connected to T and A/B ports blocked in the center position. This center condition allows the hydraulic pump to unload at low pressure through the P→T path when the system is idle, while enabling the actuator to float. Ideal for circuits requiring free actuator movement or energy-saving pump unloading.

5. Water-Resistant Manual Override (VM) – Reliable Operation in Harsh Environments

The DG4V-3S-8C-VM-U-B5-61 features a VM-type water-resistant manual override. This manual override incorporates special waterproof sealing, ensuring reliable operation even in wet, dusty, or outdoor harsh environments. In the event of electrical failure or during commissioning, the spool can be manually actuated via push-pin for system safety.

6. High Tank Port Pressure Rating – Special Circuit Applications

The DG4V-3S series features a tank port rating of up to 210 bar, far exceeding conventional directional valves. This capability makes it particularly suitable for applications requiring high return line backpressure, offering significant advantages in closed-loop circuits, hydraulic motor braking circuits, or special return circuits.

7. Multiple Electrical Connections and Coil Options – Versatile Application Adaptation

DG4V-3S series offers multiple electrical connection options including U (ISO 4400 / DIN 43650 connector), KU (top-exit flying leads), and F (1/2″ NPT conduit box). Coil voltages cover AC 110V/120V/220V/240V and DC 12V/24V, accommodating diverse electrical system requirements.

8. Drop-In Interchangeability – Minimized Downtime and Retrofit Costs

The valve strictly adheres to Eaton Vickers’ original mounting dimensions and functional specifications, with ISO 4401 / CETOP 3 / NFPA D03 interface compliance. The DG4V-3S series is a direct equivalent replacement for Rexroth 4WE6 and Yuken DSG-01 series. Whether for new system design or legacy system upgrades, this valve offers 100% mechanical and electrical interchangeability with the original Eaton Vickers unit—eliminating the need for manifold modifications or piping changes, significantly reducing downtime and retrofit expenses.

Application Areas

DG4V-3S-2C-M-U-B5-60 (2C Closed Center)：

• Injection Molding Machinery – Clamping cylinder holding and load retention

• Hydraulic Presses – Reliable slide locking in center position to prevent descent

• Lifting Platforms and Vertical Load Circuits – Safety locking to prevent unintended load descent

• Machine Tool Fixture Systems – Sequential clamping and position holding for multi-station fixtures

• Metallurgical Equipment – Precise positioning and holding for rolling mill roll gap adjustment

DG4V-3S-8C-VM-U-B5-61 (8C Tandem Center)：

• Mobile and Construction Equipment – Actuator float and pump unloading for excavators and loaders

• Material Handling Equipment – Forklift mast float in neutral position

• Agricultural Machinery – Tractor hydraulic output unloading to reduce energy consumption

• Mobile Hydraulic Systems – Pump unloading through P→T path to reduce heat generation

• Industrial Hydraulic Systems – Circuits requiring actuator float or system unloading

Expert Maintenance Tips

1. Ensure Solenoid Pressure Chamber is Oil-Filled

Proper operation of wet armature solenoids requires the pressure chamber to be completely filled with oil. During initial installation or after extended shutdown, ensure no air remains trapped in the solenoid chamber—air entrapment will affect solenoid thrust characteristics and response speed. The immersed spool design completely eliminates friction between moving seals and plunger push rods.

2. Fluid Cleanliness Management

DG4V-3S series valves have specific fluid cleanliness requirements. The clearance between spool and bore is extremely tight—contaminants can cause spool sticking or abnormal wear. Install filters with a minimum rating of 10μm upstream of the valve and maintain fluid cleanliness to ISO 4406 18/16/13 or better.

3. Electrical Connections and Voltage Matching

Both DG4V-3S-2C-M-U-B5-60 and DG4V-3S-8C-VM-U-B5-61 feature B5 coils rated at 110V AC (50 Hz) / 120V AC (60 Hz) . Verify that supply voltage and frequency match the valve’s electrical specifications prior to installation—AC solenoids must never be connected to DC power, and vice versa. Electrical connections use ISO 4400 (DIN 43650) standard connectors.

4. Manual Override Operation

DG4V-3S-2C-M-U-B5-60 features a plain manual override (M), while DG4V-3S-8C-VM-U-B5-61 features a water-resistant manual override (VM). Manual overrides are used for commissioning or emergency operation—apply even, steady pressure, avoiding sudden impacts that may damage internal mechanisms. The VM type features waterproof sealing for outdoor humid environments.

5. Installation and Sealing

Carefully review the Eaton Vickers product documentation prior to installation. Ensure the mounting surface is flat and smooth, with ISO 4401 / CETOP 3 / NFPA D03 interface compliance. Tighten mounting bolts evenly to specified torque. Take care not to damage or omit Buna-N (NBR) seals during assembly.

6. Periodic Inspection and Maintenance

Regularly verify the valve’s shifting response time and smoothness of operation. If sluggish response or abnormal heating is detected, inspect the solenoid condition and check for spool sticking. For systems that have been idle for extended periods, perform thorough system circulation filtration before restart.