Guangdong Yanhui Hydraulic Co., Ltd. is one of the leading manufacturers and suppliers of atos sdhi in China. We warmly welcome you to wholesale bulk atos sdhi for sale here from our factory. If you have any enquiry about pricelist and quotation, please feel free to email us.
Product Overview
▔▔The Atos SDHI series represents a high-performance line of spool-type proportional directional valves designed for precise, electronic directional and speed control in demanding hydraulic systems. Positioned as a core solution within Atos's premium proportional valve portfolio, the SDHI series combines direct-operated high-response solenoids with high-precision spool-sleeve designs. It delivers smooth, stepless fluid throttling and direction switching, making it ideally suited for high-precision hydraulic control scenarios such as closed-loop motion control, synchronized cylinder driving, and real-time pressure-flow adjustment in heavy industrial machinery.
Key Advantages
▔▔- Compact high-performance solenoid design delivering strong magnetic force for precise spool actuation under full system pressure.
- Reduced pressure losses through optimized internal flow channels, increasing overall system energy efficiency.
- Modular coil and valve structure allowing flexible interchangeability, quick field maintenance, and effortless coil replacement without opening the hydraulic circuit.
- Excellent dynamic response with stable switching performance across broad flow and temperature operating conditions.
Technical Specifications
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| Parameter | Specification / Range |
| Valve Size / Nominal Size | CETOP 03 / NG6 (ISO 4401 size 03) |
| Max Operating Pressure (Ports A, B, P) | Up to 350 bar (5075 psi) |
| Max Operating Pressure (Port T) | Up to 210 bar (3045 psi) |
| Max Flow Rate | Up to 80 L/min (21.1 US gpm) |
| Hysteresis | Less than 3 percent |
| Response Time (Switch On) | 30 ms to 50 ms (depending on fluid viscosity and pressure) |
| Response Time (Switch Off) | 20 ms to 40 ms |
| Fluid Temperature Range | -20 deg C to +60 deg C (standard NBR seals) / -20 deg C to +80 deg C (FKM seals) |
| Ambient Temperature Range | -20 deg C to +70 deg C |
| Recommended Viscosity Range | 15 to 100 mm2/s (cSt) |
| Max Permissible Viscosity | Up to 400 mm2/s (cSt) |
| Fluid Cleanliness Class | ISO 4406 class 20/18/15 (NAS 1638 class 9 recommended) |
Configuration Options
▔▔- Spool Configurations: Standard 3-position center options (closed center, open center, float center, tandem center) and 2-position spring-return or detent configurations.
- Control / Actuation Method: Direct electro-magnetic actuation via high-efficiency AC or DC solenoids.
- Electrical Connection Options:
- Standard DIN 43650 3-pin connector (IP65 protection degree).
- AMP Junior Timer or Deutsch connectors for mobile and harsh environment applications.
- Optional LED indicator lights and surge suppressor diodes inside the plug.
- Power Supply Voltages:
- DC Voltages: 12V DC, 24V DC, 110V DC, 220V DC.
- AC Voltages: 110V AC / 50-60Hz, 230V AC / 50-60Hz.
- Feedback and Monitoring: Optional mechanical emergency manual override button or lever; optional electronic position monitor switch for safety-critical circuits.
- Mounting Pattern: Subplate mounting according to ISO 4401-03-02-0-05 standards.
Key Materials and Components
▔▔
- Valve Body: High-strength cast iron body processed with precision shell moulding and internal honing to achieve minimal spool clearance and high wear resistance.
- Spool Material: Hardened alloy steel, precision ground and micro-finished to reduce internal leakage and prevent friction wear under continuous load.
- Solenoid Tube Assembly: Heavy-duty stainless steel wet-pin armature tube providing exceptional corrosion resistance and pressure tightness.
- Seals: Standard NBR (Nitrile) seals for mineral-based hydraulic oils; optional FKM (Viton) seals for synthetic fluids or high-temperature operating conditions.
Packaging and Transport Protection
▔▔
- Individual Industrial Packaging: Each valve unit is thoroughly cleaned, oil-flushed, and sealed in a heavy-duty anti-static VCI anti-corrosion polybag to prevent dust ingress and surface oxidation during transit.
- Shock-Absorbing Enclosure: Securely nested inside custom-fit molded foam or corrugated protective boxes to prevent surface scratches and impact shock during long-distance transportation.
- Master Export Carton and Palletization: Bulk shipments are packaged into multi-wall reinforced export cartons, strapped onto ISPM-15 compliant heat-treated wooden pallets, and wrapped in thick stretch film for complete weather resistance.
Applications
▔▔- Plastic Injection Molding Machines: Controls core pullers, ejector pins, and clamp auxiliary motion with exact timing and minimal switching shock.
- Metal Stamping and Hydraulic Presses: Serves as pilot or direct directional control for slide positioning, die cushion control, and hydraulic clamping logic.
- CNC Machine Tools and Machining Centers: Manages workpiece fixture clamping, tool changer hydraulic circuits, and spindle head positioning.
- Mobile Construction Machinery: Used in hydraulic control blocks for outrigger deployment, steering assistance, and auxiliary tool attachment control in excavators and cranes.
Related Models
▔▔
| Model Code | Description | Nominal Size | Max Pressure | Max Flow |
| SDHI-0631/2 23 | 2-position solenoid valve, spring-return, standard spool | NG6 / CETOP 03 | 350 bar | 80 L/min |
| SDHI-0711 23 | 3-position solenoid valve, closed center spool | NG6 / CETOP 03 | 350 bar | 80 L/min |
| SDHI-0713 23 | 3-position solenoid valve, open center spool | NG6 / CETOP 03 | 350 bar | 80 L/min |
| SDHI-0714 23 | 3-position solenoid valve, float center spool | NG6 / CETOP 03 | 350 bar | 80 L/min |
| SDHI-0631/2/A 23 | 2-position solenoid valve with manual emergency override | NG6 / CETOP 03 | 350 bar | 80 L/min |
| SDHI-0711/FI 23 | 3-position solenoid valve with position sensor switch | NG6 / CETOP 03 | 350 bar | 80 L/min |
FAQ
▔▔Q: Can the SDHI solenoid coils be replaced without draining the hydraulic system?
A: Yes. The SDHI series utilizes wet-pin solenoids. Coils can be safely unscrewed and replaced without opening the fluid chamber or releasing hydraulic system pressure.
Q: What type of hydraulic fluid is compatible with Atos SDHI valves?
A: Standard units with NBR seals are compatible with mineral-based hydraulic oils (HL, HLP). For synthetic fluids, fire-resistant fluids, or elevated temperatures, specify optional FKM seals.
Contact Us
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