This solenoid-operated 2-way, 2-position cartridge is a direct-acting, balanced spool directional valve. The valve is available in either a normally open or normally closed configuration.

• The solenoid tube assembly is fatigue rated for 5000 psi (350 bar) service.
• This valve is direct actuated and requires no minimum hydraulic pressure for operation.
• This cartridge has several manual override choices, including no manual override. See the CONFIGURATION section. Please note: Manual override functionality is not compatible with weatherized coils.
• Cartridges configured with EPDM seals are for use in systems with phosphate ester fluids. Exposure to petroleum based fluids, greases and lubricants will damage the seals.
• 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.
• A wide variety of coil termination and voltage options are available, with and without surge protection. See the CONFIGURATION section.
• 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 are interchangeable with other Sun Series 1 solenoid products and can be mounted on the tube in either direction.
• Coil connector options offer ratings up to IP69K. See individual coil product pages for details. Additional weatherized coils and kits are available for more complete environmental protection.
• 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.

• DLDAS
  2-way, soft shift, solenoid-operated directional spool valve
• DLDAZ
  2-way, solenoid-operated directional spool valve with position switch

• 991056 T-13A and T-31A cavities, weatherized coil seal kit
• 991225 Momentary/twist operation, manual override control kit, T control
• 991226 Detent/lock operation, manual override control kit, L control
• 991227 Dual twist/lock operation, manual override control kit, D control

• 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.

• Pressure Ramp Up for Fixed Displacement Pumps

• Sun’s High Flow 2-Way Solenoid Operated Valves
• Sun Cartridges with EPDM Seals
• 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 Expands Corrosion-Resistant Solutions
• Sun Offers Zinc-Nickel Plating for Corrosion Resistance
• Get the relief you need. Adjustable. Ventable. Blockable. FLeX-ible.
• Manually Operated Directional Valves
• High Capacity Solenoid Valves
• New FLeX Series Solenoid-Operated Directional Valves
• When Pressure Rises, Sun is there to Offer Relief

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

• 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