Tokio Keiki DG4V-5-8C-M-P7-H-7-10 Directional Valve
The DG4V-5-8C-M-P7-H-7-10 is a heavy-duty, solenoid-operated directional control valve manufactured by Tokio Keiki. Designed for the ISO 4401-05 (Size 05) mounting interface, this valve is utilized in industrial hydraulic systems requiring high flow capacities and robust pressure management. The «8C» spool configuration is particularly notable for its «Tandem Center» functionality, which allows for unique circuit behaviors during the neutral phase of machine operation.
Technical Specifications and Performance
This 10-series valve is engineered for high-performance fluid power control:
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Mounting Interface: ISO 4401-05 (Cetop 5).
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Spool Type: 8C (3-position, spring centered; P to T connected, A and B ports blocked in neutral).
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Maximum Pressure: 31.5 MPa (315 bar) with «H» specification.
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Maximum Flow Rate: Up to 120 L/min.
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Solenoid Voltage: «7» Designator (Standard 240V AC).
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Special Features: «H» (High pressure), «P7» (Internal pilot/external drain), and «M» (Manual override).
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Design Number: 10 Series.
Key Features for Industrial Applications
Tandem Center Spool (8C) for Energy Efficiency
The 8C spool configuration is a «Tandem Center» design. In the neutral position, the pump port (P) is connected directly to the tank port (T), allowing the pump to unload at low pressure while the actuator ports (A and B) remain blocked. This setup is ideal for reducing energy consumption and heat generation in fixed-displacement pump systems while maintaining the position of the hydraulic load.
High-Pressure «H» Robustness
The «H» designation signifies that the valve is built for high-pressure environments up to 31.5 MPa. Utilizing a wet-armature solenoid, the internal moving parts are continuously lubricated by the hydraulic fluid. This design ensures extremely quiet switching and prevents the mechanical wear associated with dry solenoids, significantly extending the valve’s operational life.
