3-way, solenoid-operated directional spool valve (740 Series)

This solenoid-operated 3-way, 2-position cartridge is a direct-acting, balanced spool directional valve.

• The solenoid tube assembly is fatigue rated for 5000 psi (350 bar) service.
• The R-spool is closed in the transition between its two positions. This results in a higher performance limit at the expense of lower capacity. When used as pilot controls, where capacity is not a factor, the closed transition will provide faster and more consistent response times.
• This valve is direct actuated and requires no minimum hydraulic pressure for operation.
• All configurations of this valve include zinc-nickel plating as standard for 1000-hour salt fog protection.
• Coil connector options offer ratings up to IP69K. See individual coil product pages for details.
• This cartridge utilizes both 740 Series high-power and 747 Series hazardous location coils.
• This cartridge has an option for manual override. See the CONFIGURATION section.
• On models equipped with the D or L control, the detent mechanism in the manual override is meant for temporary actuation. The D, L and T manual control assemblies have a mechanical life expectancy of approximately 7,000 cycles.
• This valve utilizes a wet armature design. This means that the working fluid surrounds the armature and is exposed to the heat generated by the coil. This can be a factor if the coil is energized for long periods of time. Some fluids, notably water/glycol mixtures, break down at these temperatures over time and form varnishes that will affect the function of the cartridge.
• The solenoid's unique magnetic design results in a high efficiency solenoid, yielding high spool actuating force per Watt expended, leading to reliable valve shifting.
• Coils can be mounted on the tube in either direction.
• Incorporates the Sun floating style construction to minimize the possibility of internal parts binding due to excessive installation torque and/or cavity/cartridge machining variations.

• DMDFS
  3-way, soft shift, solenoid-operated directional spool valve (740 Series)

• Please verify cartridge clearance requirements when choosing a Sun manifold. Different valve controls and coils require different clearances.
• An additional 2.00 inches (50,8 mm) beyond the valve extension is needed for coil installation and removal.

• Sun Cartridges with EPDM Seals
• FLeX Series 3-way directional blocking poppet valves
• Solenoid Operated Directional Valves Technical Tips
• QuickDesign with SmartConnect Offers Drag-and-Drop Schematic Tool
• Pilot Controlled Directional Cartridges Technical Tips
• Sun's New FLeX Series Solenoid Valves & Coils
• Sun Offers Zinc-Nickel Plating for Corrosion Resistance
• Get the relief you need. Adjustable. Ventable. Blockable. FLeX-ible.
• Sun Expands Corrosion-Resistant Solutions
• Pilot-to-Shift Directional Valves and Proportional Throttles
• New FLeX Series Solenoid-Operated Directional Valves
• Manually Operated Directional Valves

• Solenoid Operated Directional Valves (1.01 MB)
• Manufacturing Sun Cartridge Cavities (522.27 KB)
• Solenoid Coils for Switching and Proportional Valves (975.2 KB)

• Performance Data
• Cavity Information (S-171) and Tooling
• Sun's Floating Style Screw-In Cartridge (1.06 MB)
• Sun Model Code Explanation; 999-901-334 (343.9 KB)
• Fluid Recommendations: Oil Viscosity, Cleanliness & Temperature
• Cartridges: Materials of Construction
• Units of Measure, Settings, and Conversions