SDHE-0631/2 Atos Solenoid Valve 350bar

Product Overview:

The SDHE and SDKE series are high-pressure, direct-acting, spool-type directional solenoid valves engineered for modern, demanding hydraulic systems. Strictly adhering to ISO 4401 standards (NG6/CETOP 03 and NG10/CETOP 05), these valves deliver exceptionally precise fluid routing in critical industrial control circuits. Positioned as a premium aftermarket solution for original Atos SDHE and SDKE components, we guarantee 100% drop-in interchangeability. Built with a robust precision-cast iron body and subjected to rigorous 100% simulated operational condition testing, these valves ensure zero external leakage, minimal internal drift, and unmatched shifting consistency even under extreme 350 bar loads—significantly reducing your equipment’s lifecycle maintenance costs.

Technical Specifications:

• Model Numbers: SDHE-0631/2-X 00, SDHE-0631/2/A-X 28DC 10S, SDKE-1630/1631 (and related sub-variants)

• Mounting Standard: ISO 4401 size 03 (SDHE – NG6) / size 05 (SDKE – NG10)

• Max Operating Pressure (Ports P, A, B): 350 bar (5075 psi)

• Max Operating Pressure (Port T): 210 bar (DC standard) / 160 bar (AC versions)

• Max Flow Rate: Up to 80 L/min (21 gpm) for SDHE; Up to 150 L/min (40 gpm) for SDKE

• Coil Voltage Options: 28V DC (28DC), standard 12V/24V DC, and 110V/220V AC configurations

• Control Method: Direct-acting Solenoid Operated

• Fluid Temperature Range: -20°C to +70°C (equipped with NBR standard seals)

• Ambient Temperature: -20°C to +50°C

Key Technical Advantages:

• Flawless 100% Interchangeability: The mounting interface, port patterns, and bolt hole dimensions strictly conform to micron-level ISO/CETOP standards. This allows operators to directly replace factory Atos SDHE/SDKE valves without any subplate modifications or re-piping, minimizing system downtime.

• High-Pressure Casing & Precision Honing: Manufactured utilizing 5-axis CNC machining and specialized resin-shell casting techniques, the spool and bore clearances are maintained at the micron level. This ultra-precise fit drastically reduces volumetric loss (internal leakage) at 350 bar, ensuring rapid and crisp dynamic response.

• Extended-Life Wet-Pin Solenoids: Featuring a fully enclosed wet-pin solenoid architecture, the moving armature operates submerged in the hydraulic fluid, which provides excellent natural cooling and lubrication. This design eliminates mechanical wear, cushions shifting impacts for whisper-quiet operation, and shields the coil from environmental moisture and corrosion.

• 100% Severe Condition Simulation Testing: We refuse to rely on batch sampling. Every single valve is connected to our heavy-duty test rigs and subjected to high-frequency dynamic shifting tests at maximum flow and 350 bar peak pressure to guarantee zero infant mortality and rock-solid field reliability.

Application Areas:

• Plastic Injection & Blow Molding: Precise control of injection, clamping, and ejection cycles.

• Metal Forming & CNC Machinery: Ideal for Hydraulic Power Units (HPUs), clamping circuits, and heavy forging presses.

• Mobile Construction Equipment: Attachment control for excavators, drill rigs, and specialized lifting platforms.

• Automated Production Lines: Material handling systems, metallurgy equipment, and general industrial hydraulics.

Expert Maintenance Tips:

• Contamination Control is Paramount: We strongly recommend maintaining system fluid cleanliness at ISO 4406 class 20/18/15 or better using high-efficiency return or pressure filters. Solid particle ingress is the primary cause of spool binding; a jammed spool prevents full armature stroke, causing excessive current draw and ultimate coil burnout.

• High-Pressure Subplate Verification: Prior to installation, meticulously check the mounting subplate. For safe operation at 350 bar, the mating surface flatness must be within 0.01/100 mm, with a surface finish not exceeding Ra 0.8. Any unevenness is the leading cause of O-ring extrusion under high-pressure pulsations.

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