Atos SDHI Solenoid Valve | SDHI-0631/2 | SDHI-0639/0 | SDHI-0630/2 | NG6 Directional Control Valve

SDHI Series Direct-Acting Solenoid Directional Valves

Product Overview:

The SDHI Series is one of the most versatile direct-acting solenoid directional valves used in industrial hydraulic systems. Featuring a 3-chamber or 5-chamber body design, these valves utilize solenoids to drive the spool directly, enabling precise oil flow switching. The range covers mainstream spool configurations including 0, 1, 2, and 9, meeting complex circuit logic requirements. Thanks to high-precision manufacturing, the SDHI series maintains ultra-low internal leakage under high-pressure conditions, making it ideal for machine tools, woodworking machinery, injection molding, and compact hydraulic power units.

Featured models: SDHI-0630/2 23, SDHI-0631/2 23, SDHI-0631/2/A, SDHI-0632/2, and SDHI-0639/0.

Key Technical Advantages:

• High-Performance Wet-Pin Solenoids: The armature moves smoothly within hydraulic fluid, reducing mechanical wear and shifting shocks for a significantly extended service life.

• Full Voltage Compatibility: Interchangeable coil design supports 12VDC, 24VDC, 110VAC, 220VAC, and other electrical standards.

• Rugged Industrial Design: The high-strength cast iron body is precision-ground to ensure superior reliability even under high-frequency switching.

• Series 23 Optimization: Enhanced flow path structures further reduce pressure drop ($\Delta P$), improving overall system energy efficiency.

Detailed Specifications & Parameters:

• Featured Model Matrix:

  • SDHI-0631/2 23: The most common 4-way/3-position valve, spool type 2 (all ports blocked in center), Series 23.

  • SDHI-0631/2/A: Variant featuring specialized auxiliary functions or mounting styles.

  • SDHI-0630/2: 4-way/2-position single solenoid configuration.

  • SDHI-0639/0: Specific spool configuration optimized for unloading response.

• Core Technical Specs:

  • Mounting Interface: Complies with ISO 4401-03-02-0-05 (NG6 / Size 06).

  • Max Pressure: Up to 350 bar (5075 psi) on P, A, and B ports; up to 210 bar on T port.

  • Max Flow Rate: Up to 60 L/min (15.8 USgpm).

  • Electrical Connection: Standard DIN 43650 connector with IP65 protection.