FLeX Series 2-way, direct-acting, solenoid-operated directional blocking poppet valve

Capacity: 7 gpm28 L/min. | Cavity: T-8A
DTAF : FLeX Series 2-way, direct-acting, solenoid-operated directional blocking poppet valve
Technical Features [ + ]

This FLeX Series solenoid-operated 2-way, 2-position cartridge is a direct-acting directional poppet valve. Available in either normally open or normally closed configurations, these valves feature a pressure-balanced design, low leakage, and allow flow or blocking in both directions.

This cartridge can be installed directly into a cavity in the end of many of Sun's pilot operated and ventable valves to provide integrated pilot control.

  • Cartridge can be installed directly into a cavity in some Sun pilot operated and ventable cartridges to provide electrically operated pilot control functions. Separate pilot lines are eliminated and only one cavity needs to be machined to accommodate both the control and primary function.
  • Suitable for load-holding applications when configured as Normally Closed. In the event of power failure, the valve will close.
  • 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.
  • Designed and tested to 10-million operational cycles at full-rated pressure.
  • Exceeds new NFPA test standard T2.6.1 R2014 for fatigue and burst pressure ratings.
  • Higher flow rates than competing valves of similar size.
  • Designed using CFD simulation for optimized geometries.
  • All configurations of this valve include zinc-nickel plating as standard for 1000-hour salt fog protection.
  • Normally Closed configuration can be used with any of the 740 Series coils, which include low-power, high-power, and 747 Series explosion-proof coils. Normally Open configuration can be used with the high-power and explosion proof coils only.
  • Coil connector options offer ratings up to IP69K. See individual coil product pages for details.
  • This valve is available with a manual push-type override option.
  • This valve exhibits extremely low leakage - 0.004 in3 (0,07 cc)/min (1 drop/min).
  • 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.
  • A wide variety of coil termination and voltage options are available, with and without surge protection. See the CONFIGURATION section.
  • 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.
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Technical Data [ + ]
Note: Data may vary by configuration. See CONFIGURATION section.
Cavity T-8A
Series P
Capacity 7 gpm28 L/min.
Maximum Operating Pressure 5000 psi350 bar
Maximum Valve Leakage at 110 SUS (24 cSt) 0.004 in³/min.@5000 psi0,07 cc/min.@350 bar
Viscosity Range 35 - 2000 SUS2,8 - 380 cSt
Response Time - Typical 50 ms50 ms
Switching Frequency 15,000 max. cycles/hr15,000 max. cycles/hr
Valve Hex Size 3/4 in.19,1 mm
Valve Installation Torque 20 - 25 lbf ft27 - 33 Nm
Model Weight 5.6 oz.159 grams
U.S. Patent # 10,302,20110,302,201
Seal kit - Cartridge Buna: 990608007
Seal kit - Cartridge Viton: 990608006
Seal and nut kit - Coil Viton: 990740006
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Performance Curves [ + ]
Performance Curve for DTAF: FLeX Series 2-way, direct-acting, solenoid-operated directional blocking poppet valve Performance Curve for DTAF: FLeX Series 2-way, direct-acting, solenoid-operated directional blocking poppet valve Performance Curve for DTAF: FLeX Series 2-way, direct-acting, solenoid-operated directional blocking poppet valve Performance Curve for DTAF: FLeX Series 2-way, direct-acting, solenoid-operated directional blocking poppet valve Performance Curve for DTAF: FLeX Series 2-way, direct-acting, solenoid-operated directional blocking poppet valve
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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.

Is the FLeX program available in QuickDesign SmartConnect?

Yes. All FLeX phase 1 valves are available in the SmartConnect schematic tool, and are also available for submittal to QuickDesign.

Do FLeX valves utilize a floating nose design?
Yes. All FLeX valves utilize the Sun floating nose design.
What is the difference between nominal and maximum flow capacity?
Nominal flow capacity is based on performance limits. Maximum flow capacity is based on pressure drop. When selecting any direct-acting solenoid valve, first check the performance limits plot, then check if pressure drop is acceptable.
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.
What is the flow performance limit of pilot-operated FLeX cartridges?

Pilot-operated FLeX cartridges shift at rated flow and pressure.

Why is the minimum opening pressure (bias spring pressure) on pilot-operated FLeX cartridges lower than competitor product?

FLeX pilot-operated cartridges do not have a bias spring in their open state. These valves will shift with less than 5 psi differential. This results in pilot-operated shift performance with direct-acting minimum pressure operation.

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  • DTAFSFLeX Series 2-way, soft shift, solenoid-operated directional poppet valve - pilot capacity
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  • 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
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  • 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
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Notes [ + ]
  • For Series 1 cartridges configured with an O control (panel mount handknob), a .75 in. (19 mm) diameter hole is required in the panel.
  • 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.
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Additional Resources [ + ]
Highlights
Technical Tips
Technical Information
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Coil Information [ + ]

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