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

Capacity: .25 gpm1 L/min. | Cavity: T-9A
DBAF : 3-way solenoid-operated directional spool valve - pilot capacity (740 Series)
Technical Features [ + ]

This solenoid-operated 3-way, 2-position cartridge is a direct-acting, balanced spool pilot valve used to pilot other full-flow valves. The valve is normally open between port 1 and port 2 or port 1 and port 3 and all flow paths are bidirectional.

This valve is designed to be used with 740 and 747 Series coils.

  • 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.
  • Valves exhibit extremely low leakage rates; less than 10 drops/min. @ 5000 psi (0,7 cc/min @ 350 bar).
  • This cartridge utilizes 740 Series low-power and high-power coils, and 747 Series hazardous location coils for both Normally Open and Normally Closed configurations.
  • This cartridge has an option for manual override. See the CONFIGURATION section.
  • 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.
  • 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.
  • 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.
  • A FULL DATA SHEET is available for this model using the link at the top of the page.
  • 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.
  • 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.
Back to Top
Technical Data [ + ]
Note: Data may vary by configuration. See CONFIGURATION section.
Cavity T-9A
Series P
Capacity .25 gpm1 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
Manual Override Force Requirement 10 lbs/1000 psi @ Port 166 N/100 bar @ Port 1
Manual Override Stroke .10 in.2,5 mm
Response Time - Typical 50 ms50 ms
Switching Frequency 15,000 max. cycles/hr15,000 max. cycles/hr
Solenoid Tube Diameter .63 in.16 mm
Valve Hex Size 7/8 in.22,2 mm
Valve Installation Torque 20 - 25 lbf ft27 - 33 Nm
Seal kit - Cartridge Buna: 990009007
Seal kit - Cartridge EPDM: 990009014
Seal kit - Cartridge Polyurethane: 990009002
Seal kit - Cartridge Viton: 990009006
Back to Top
Performance Curves [ + ]
Performance Curve for DBAF: 3-way solenoid-operated directional spool valve - pilot capacity (740 Series) Performance Curve for DBAF: 3-way solenoid-operated directional spool valve - pilot capacity (740 Series) Performance Curve for DBAF: 3-way solenoid-operated directional spool valve - pilot capacity (740 Series) Performance Curve for DBAF: 3-way solenoid-operated directional spool valve - pilot capacity (740 Series)
Back to Top
FAQs [ + ]
How big is a drop of hydraulic oil?  

There are exactly 250 Sun drops in a cubic inch or 15 in a cc.

Direct acting or pilot operated - what do I use?

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.

What parts of the Sun cartridge valve are field serviceable?
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.
Back to Top
  • DBAFS3-way, soft shift, solenoid-operated directional spool valve - pilot capacity (740 Series)
Back to Top
  • 991283 740 Series momentary/twist operation, manual override control kit, T control
  • 991284 740 Series detent/lock operation, manual override control kit, L control
  • 991285 740 Series dual twist/lock operation, manual override control kit, D control
  • 991301 740 Series, red momentary/twist operation, manual override control kit, T control
  • 991302 740 Series, red detent/lock operation, manual override control kit, L control
  • 991303 740 Series, red dual twist/lock operation, manual override control kit, D control
Back to Top
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.
Back to Top
Additional Resources [ + ]
Highlights
Technical Tips
Technical Information
Back to Top
Coil Information [ + ]

No coil selected.

Back to Top