Guangdong Yanhui Hydraulic Co., Ltd. is one of the leading manufacturers and suppliers of atos sdhe-0631 directional control safety solenoid valve in China. We warmly welcome you to wholesale bulk atos sdhe-0631 directional control safety solenoid valve 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 SDHE-0631 is a high-performance, direct-operated directional control safety solenoid valve designed for rigorous industrial hydraulic systems. Manufactured by Atos, a global leader in electrohydraulics, the SDHE series represents a standard-setting solution for subplate mounting (ISO 4401 size 06 / CETOP 03 / D03 interface).
Key Advantages
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High-Pressure & Flow Performance: Rated for operating pressures up to 350 bar and fluid flow rates up to 80 l/min, outperforming conventional CETOP 3 valves.
Integrated Safety Spool Monitoring: Available with microswitches or inductive proximity sensors to verify spool position in real-time, facilitating safety category compliance (Cat. 2 / 3 / 4, PL c/d/e).
Robust Construction: Features wet-pin AC or DC solenoids with threaded tubes, ensuring leak-free performance, low noise, and easy coil replacement without exposing fluid.
Versatile Spool Configurations: Available with multiple spool types (closed center, open center, tandem center, float center) to match precise hydraulic circuit requirements.
World-Class Certifications: Fully compliant with ISO 4401, CE directives, RoHS, and optional ATEX/IECEx or UL/CSA approvals for international installation.
Thermal Efficiency & Durability: Engineered optimized magnetic circuits ensure low power consumption, reduced thermal stress, and extended operating cycles.
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Technical Specifications
▔▔| Parameter | Specification / Value |
| Manufacturer | Atos Hydraulics |
| Valve Model Series | SDHE Series |
| Model Code | SDHE-0631 / SDHE-0631/2 (Inductive switch variant) |
| Mounting Interface | ISO 4401-03-02-0-05 (CETOP 03 / NG6) |
| Valve Type | Direct-Operated Directional Solenoid Valve with Safety Switch |
| Spool Type | Spool Type 631 (4-Way, 3-Position, Closed Center) |
| Max Working Pressure (Ports P, A, B) | 350 bar (5075 psi) |
| Max Return Pressure (Port T) | 210 bar (DC version) / 160 bar (AC version) |
| Max Flow Rate | Up to 80 L/min (21 US gpm) |
| Fluid Temperature Range | -20°C to +80°C (standard seals), up to +120°C (FPM seals) |
| Fluid Viscosity Range | 15 to 100 mm²/s (cSt), recommended 25 to 75 mm²/s |
| Fluid Cleanliness Grade | ISO 4406 class 20/18/15 (NAS 1638 class 9) or better |
| Supply Voltages (DC) | 12V DC, 24V DC, 110V DC, 220V DC |
| Supply Voltages (AC) | 110V/50-60Hz, 230V/50-60Hz |
| Electrical Connector Type | DIN 43650 (IP65 protection level standard) |
| Position Switch Type | Inductive proximity sensor (PNP or NPN output) |
| Weight | Approx. 2.0 kg (single solenoid) / 2.6 kg (double solenoid) |
Applications
▔▔| Industry Sector | Primary Application | Key Valve Function / Benefit |
| Metal Stamping & Presses | Press Safety Blocks & Hold-Down Systems | Positively monitors spool movement to safely prevent unintended cylinder stroke or press dropping during loading/unloading. |
| Injection Molding Machines | Safety Door Interlocks & Mold Clamping | Ensures mold movement is deactivated when safety guards are opened, compliant with standard machine safety regulations. |
| Industrial Automation & Robotics | Hydraulic Actuator Position Control | Direct spool monitoring provides instant fault detection for high-speed automated assembly lines. |
| Heavy Machinery & Metallurgy | Steel Mill Rollers, Tilters & Hydraulic Power Units | Delivers robust 350 bar continuous performance under high vibration, heat, and high-frequency cycling. |
| Mobile & Offshore Hydraulics | Marine Cranes, Winches & Deck Machinery | Features corrosion-resistant options and high T-port pressure ratings for reliable outdoor/marine operations. |
Related Models
▔▔| Model Code | Spool / Valve Type | Voltage | Safety Sensor / Switch Feature | Key Description |
| SDHE-0631/2 24DC | 3-Position / Spool Code 31 | 24V DC | Optional / Standard Cover | Spring Centered, Closed Center in Neutral |
| SDHE-0631/2/FI 24DC | 3-Position / Spool Code 31 | 24V DC | Inductive Position Sensor (FI) | Safety monitoring valve with PNP proximity switch |
| SDHE-0631/2/FC 24DC | 3-Position / Spool Code 31 | 24V DC | Mechanical Microswitch (FC) | Safety monitoring valve with limit switch |
| SDHE-0631/2 110AC | 3-Position / Spool Code 31 | 110V AC | Optional / Standard Cover | High-voltage AC solenoid variant |
| SDHE-0631/2 230AC | 3-Position / Spool Code 31 | 230V AC | Optional / Standard Cover | European standard mains voltage coil |
| SDHE-0711/2 24DC | 2-Position / Spool Code 11 | 24V DC | Optional / Standard Cover | Direct operated, 2-position spring offset valve |
| SDHE-0751/2 24DC | 3-Position / Spool Code 51 | 24V DC | Optional / Standard Cover | Open center configuration (P, A, B, T connected) |
| SDHE-0631/2/PE 24DC | 3-Position / Spool Code 31 | 24V DC | FKM (Viton) Seals included | High-temperature or synthetic fluid compatible |
FAQ
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Q1: What makes the Atos SDHE-0631 a "Safety" directional control valve?
Answer: The safety configuration of the SDHE-0631 features an integrated position monitoring device (such as an inductive proximity sensor /FI or mechanical limit switch /FC). This switch monitors the physical position of the internal valve spool. By providing direct position feedback to a machine's safety controller, the valve enables compliance with ISO 13849-1 safety levels (up to PL d or PL e), ensuring the hydraulic actuator cannot move unexpectedly if a valve failure occurs.
Q2: Can the solenoid coil on the SDHE-0631 valve be replaced without draining the hydraulic system?
Answer: Yes. The SDHE series utilizes "wet-pin" solenoids where the coil slides over a sealed central armature tube containing hydraulic fluid. To replace or change a coil (e.g., swapping from 24V DC to 110V AC), simply unscrew the retaining nut and slide off the coil. No oil will leak, and there is no need to depressurize or drain the system.
Contact Us
▔▔Request a Quote Today to ensure your hydraulic system performs at its best with genuine components from Yanhui Hydraulic.
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