Model: DFFAXCN
2-way, 2-stage, solenoid-operated directional poppet valve - flow 1-2
Capacity: 120 gpm480 L/min. |
Cavity: T-18A
Symbols for DFFA
X-Control, C-Poppet
X-Control, H-Poppet
D-Control, C-Poppet
D-Control, H-Poppet
L-Control, C-Poppet
L-Control, H-Poppet
M-Control, C-Poppet
M-Control, H-Poppet
T-Control, C-Poppet
T-Control, H-Poppet
Technical Features [ + ]
This solenoid controlled, 2-way, 2-position cartridge is a pilot-operated, poppet style directional valve with reverse free flow check. It is available in either a normally open or normally closed configuration. Due to its poppet style construction, it has extremely low leakage.
- The solenoid tube assembly is fatigue rated for 5000 psi (350 bar) service.
- Valves exhibit extremely low leakage rates; less than 10 drops/min. @ 5000 psi (0,7 cc/min @ 350 bar).
- 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.
- 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.
Technical Data [ + ]
Note: Data may vary by configuration. See CONFIGURATION section.
| Cavity | T-18A |
| Series | 4 |
| Capacity | 120 gpm480 L/min. |
| Maximum Operating Pressure | 5000 psi350 bar |
| Maximum Valve Leakage at 110 SUS (24 cSt) | 10 drops/min.@5000 psi0,7 cc/min.@350 bar |
| Check Cracking Pressure | 50 psi3,5 bar |
| Response Time - Typical | 30 ms30 ms |
| Switching Frequency | 15,000 max. cycles/hr15,000 max. cycles/hr |
| Solenoid Tube Diameter | .75 in.19 mm |
| Valve Hex Size | 1 5/8 in.41,3 mm |
| Valve Installation Torque | 350 - 375 lbf ft474 - 508 Nm |
| Model Weight | 1.10 lb0,50 kg |
| Seal kit - Cartridge | Buna: 990018007 |
| Seal kit - Cartridge | Viton: 990018006 |
Performance Curves [ + ]
FAQs [ + ]
There are exactly 250 Sun drops in a cubic inch or 15 in a cc.
Direct-acting valves are used to prevent over pressure, and pilot-operated valves are used to regulate pressure. If you are unsure, use a direct-acting valve. Sun's direct acting valves are very fast, dirt tolerant, stable, and robust. Sun's pilot-operated valves are moderately fast, they have a low pressure rise vs. flow curve, and they are easy to adjust.
Only external seals are serviceable. Sun offers replacement seal kits for all cartridge models. The applicable kit part number can be found in the product page's Technical Data table or by using our Cartridge Seal Kit search function located under Accessories. Please note: Converting the external seals from one material to another does not ensure fluid compatibility with that material due to the existence of internal seals within the cartridge.
Related Models [ + ]
- DFFA82-way, poppet directional valve with integral T-8A control cavity - control 1-2
Related Accessories [ + ]
Notes [ + ]
- 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.
Additional Resources [ + ]
Highlights
- 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
- 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
- When Pressure Rises, Sun is there to Offer Relief
Technical Tips
- Manufacturing Sun Cartridge Cavities (522.27 KB)
- Solenoid Coils for Switching and Proportional Valves (975.2 KB)
- Solenoid Operated Directional Valves (1.01 MB)
Technical Information
Coil Information [ + ]
No coil selected.