Atos DHI-0631 Hydraulic Solenoid Valve

The Atos DHI-0631 is an industrial-grade, direct-operated solenoid directional control valve engineered to accurately govern fluid flow vectors in high-performance hydraulic systems. Manufactured by Atos, a global leader in electrohydraulics, the DHI size NG06 (CETOP 3) platform is highly regarded for its optimized internal casting geometry, which allows for maximum flow limits with incredibly low pressure drops.

This specific model utilizes advanced wet armature solenoid tubes. Because the internal switching core operates fully immersed in hydraulic oil, it gains natural fluid lubrication and cushioning. This process eliminates the external pushpin weeping common in old-fashioned dry-pin designs, lowers overall machine noise levels, and extends the operational life of the valve over millions of continuous high-frequency cycles.

Core Technical Features & Advantages

• Optimized Flow Dynamics: Internal core passages are shell-moulded and computationally designed to provide smooth, laminar fluid pathing, minimizing heat generation and energy loss.

• High Permissible Tank Backpressure: Ruggedly built to withstand substantial counter-pressures on the return line (Port T) without causing spool stiction, sluggish performance, or uncommanded shifts.

• Hardened Spool Construction: The precision-ground sliding spool features optimal clearance tolerances and hardened metallurgy to drastically reduce internal cross-port thermal bypass slip.

• Modular Electrical Customization: Compatible with a wide variety of AC or DC voltage coils and heavy-duty enclosures, offering excellent IP-rated protection against ambient dust, humidity, and oil mist.

• Safe Manual Testing Override: Features a built-in manual override pin on the solenoid tube, allowing maintenance engineers to cycle the circuit safely during power-off machine setup or testing procedures.

Primary Applications

The Atos DHI series is an essential automated control component relied upon globally across automated manufacturing and processing sectors:

• High-precision CNC machine tools, automated machining fixtures, and robotic positioning units

• Plastic processing machinery, thermoforming plants, and injection molding cores

• Metal stamping, sheet-metal shearing, and automated industrial pressing machinery

• Multi-station industrial Hydraulic Power Units (HPUs) and centralized system manifold blocks

• Material handling conveyor networks, automated sorting systems, and heavy-duty lift loops

Technical Specifications Table