Product Overview
The DG5V series solenoid controlled pilot operated directional valve (including models DG5V-8-H-2C-M-U-H-10, DG5V-5-2A-M-U-H7-10, and DG5V-7-3C-T-P2-T-84-JA137) is manufactured to original Eaton Vickers technical standards, covering three frame sizes: DG5V-5 (size 05 / NG10 / CETOP 5), DG5V-7 (size 07 / NG16 / CETOP 7), and DG5V-8 (size 08 / NG25 / CETOP 8). All three series feature pilot-operated two-stage design with high-performance DG4V-3 series solenoid pilot valves. The main spool is positioned by pilot pressure, used for controlling the starting, stopping, and direction of fluid flow in medium-to-high flow hydraulic systems.
The DG5V-8-H-2C-M-U-H-10 features spool type 2C (all ports closed in center), spring centered, internal pilot supply, external pilot drain, and 24 VDC wet armature solenoids. The main stage delivers maximum flow of 700 L/min (185 USgpm) at 350 bar (5000 psi), with a pilot valve tank line pressure rating of 210 bar (3000 psi). The DG5V-5-2A-M-U-H7-10 features spool type 2A (spring offset) with maximum flow of 160 L/min (42 USgpm) at 315 bar (4567 psi). The DG5V-7-3C-T-P2-T-84-JA137 features spool type 3C (closed center) with maximum flow of 300 L/min (80 USgpm) at 350 bar (5000 psi).
This product is dimensionally and functionally identical to the original Eaton Vickers DG5V series valves, offering true drop-in interchangeability for direct replacement of same-specification OEM valves. The DG3V and DG5V are 100% interchangeable with previous H8 design 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: DG5V-8-H-2C-M-U-H-10 / DG5V-5-2A-M-U-H7-10 / DG5V-7-3C-T-P2-T-84-JA137
Product Series: DG5V-5 (Size 05 / NG10 / CETOP 5 / ISO 4401-05); DG5V-7 (Size 07 / NG16 / CETOP 7 / ISO 4401-07); DG5V-8 (Size 08 / NG25 / CETOP 8 / ISO 4401-08)
Design Series: 10 series / 40 series / 84 series
Spool Type: 2C (All ports closed in center) / 2A (Spring offset) / 3C (Closed center, P/A/B blocked, A to T)
Spring Arrangement: C (Spring centered) / A (Spring offset)
Design: Solenoid controlled, pilot operated, two-stage directional control valve
Mounting Pattern: DG5V-5 per ISO 4401-05; DG5V-7 per ISO 4401-07; DG5V-8 per ISO 4401-08
Installation Position: Any
Hydraulic Parameters (DG5V-8 Series)
Maximum Flow Rate: 700 L/min (185 USgpm)
Maximum Operating Pressure (Ports P/A/B): 350 bar (5000 psi)
Pilot Valve Tank Line Pressure Rating: 210 bar (3000 psi, DC solenoid)
Hydraulic Fluid: Mineral-based hydraulic oil, water glycol
Fluid Temperature Range: -20°C to +80°C
Filtration: ISO 4406 20/18/15
Hydraulic Parameters (DG5V-7 Series)
Maximum Flow Rate: 300 L/min (80 USgpm)
Maximum Operating Pressure (Ports P/A/B): 350 bar (5000 psi)
Pilot Valve Tank Line Pressure Rating: 210 bar (3000 psi, DC solenoid)
Weight: approx. 9.1 kg
Bolt Height: 33 mm
Hydraulic Parameters (DG5V-5 Series)
Maximum Flow Rate: 160 L/min (42 USgpm)
Maximum Operating Pressure (Ports P/A/B): 350 bar (5000 psi)
Maximum Tank Port Pressure (Port T): 160 bar (2300 psi, AC solenoid) / 210 bar (3000 psi, DC solenoid)
Weight: approx. 7.4 kg
Pilot Valve Parameters
Pilot Valve Model: DG4V-3-60 high-performance pilot valve (H type) / DG4V-3S-60 standard-performance pilot valve (S type)
Pilot Valve Size: 03 (NG6 / CETOP 3)
Pilot Valve Maximum Flow: 80 L/min
Pilot Valve Tank Line Pressure Rating: H type 210 bar (3000 psi) / S type 100 bar (1450 psi)
Pilot Valve Actuation: Wet armature solenoid
Electrical Parameters
Supply Voltage: 24 VDC (H7) / 110V AC 50Hz / 120V AC 60Hz (B type optional)
Power Consumption: 30 W (DC solenoid)
Electrical Connector: ISO 4400 / DIN 43650 standard connector (U type)
Protection Class: IP65 (with standard connector)
Molded-in surge suppressor/diodes available
LED indicator lights available
Materials & Construction
Valve Body: High-strength cast iron, solid cast body with cored passages
Control Spool: Carburized steel, precision ground
Seals: Buna-N (standard)
Surface Treatment: Phosphating / anti-corrosion coating
Key Technical Advantages
1. High Flow Capacity with Low Pressure Drop
The DG5V-8 series delivers up to 700 L/min in size 08, the DG5V-7 series delivers 300 L/min in size 07, and the DG5V-5 series delivers 160 L/min in size 05. All three series feature solid cast bodies and cored passages for maximum strength and minimal pressure drop, effectively reducing system energy loss and improving hydraulic system efficiency.
2. High-Performance Pilot Valve with High Tank Line Pressure Rating
The H type pilot valve (DG4V-3-60) offers a tank line pressure rating of 210 bar (3000 psi), significantly higher than the S type standard performance pilot valve rating of 100 bar (1450 psi). This characteristic makes it particularly suitable for industrial hydraulic systems with high return line back pressure. High force solenoids and centering springs assure consistent shifting through a wide range of pressure and silting extremes.
3. Precision Spool Machining with 18 Spool Options
The control spool is precision-ground from carburized steel with micron-level clearance control. The DG*V series offers up to 18 different spool types including 2C (all ports closed), 2A (spring offset), and 3C (P/A/B blocked, A to T), meeting diverse hydraulic circuit design requirements.
4. Durability-Tested High Reliability Design
The valve has been endurance tested to 10 million cycles and fatigue tested without failure to ensure the highest reliability in high flow and pressure applications. High force solenoids and centering springs assure consistent shifting through a wide range of pressure and silting extremes. The DG3V and DG5V are 100% interchangeable with previous H8 design valves.
5. 100% Simulated Working Condition Testing and Drop-in Interchangeability
Every DG5V 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. The DG3V and DG5V are 100% interchangeable with previous H8 design valves, enabling direct drop-in replacement without modifying piping or control programs.
Application Areas
Die Casting Machines: High-flow directional control for shot systems, suitable for UBE die casting machines and similar large equipment
Injection Molding Machines: Directional control for large injection molding machine mold closing, injection, and ejector high-flow hydraulic circuits
Hydraulic Presses: Main cylinder directional control and fast/slow speed switching for medium-to-large tonnage presses
Metallurgical Equipment: High-flow directional control for continuous casting machines and rolling mill auxiliary hydraulic systems
Construction Machinery: Main hydraulic circuit directional control for excavators and cranes
Marine Hydraulics: Steering gear control and deck machinery high-flow directional control
Testing Equipment: Hydraulic loading direction control for large material testing machines
Wind Power Generation: Pitch control system hydraulic directional control
Expert Maintenance Tips
Installation Guidelines
The DG5V series can be mounted in any position. Mounting surface flatness must be ≤ 0.05 mm. Recommended tightening torque for DG5V-7 is 49-59 Nm. The mounting surface conforms to ISO 4401-05/07/08 for direct installation on standard subplates or manifolds.
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.
Pilot Drain Line Management: This valve uses external pilot drain. The pilot drain line must return independently to the reservoir with back pressure not exceeding 210 bar (3000 psi). The pilot drain line must not share a common return with other high-pressure circuits.
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 20/18/15 or better. Check fluid particulate contamination every 500 operating hours and replace filter elements and hydraulic fluid when contamination exceeds limits.
Pilot Valve Maintenance: Periodically inspect the DG4V-3-60 pilot stage for proper operation and stable pilot pressure. Pilot valve tank line pressure must not exceed 210 bar. If main stage shifting is abnormal, first check the pilot valve filter for blockage.
Solenoid Electrical Inspection: Periodically inspect solenoid connectors for seal integrity and terminal tightness. Measure coil resistance and replace the coil if deviation exceeds ± 10%. Power consumption is 30 W (DC solenoid); 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 Buna-N seals. Under normal operating conditions, replace valve seals every 3,000-5,000 operating hours. For high-temperature applications, reduce the replacement interval.
