DTAF | Cartridges » Solenoid Operated » 2-way

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.
Designed and tested to 10 million on-off operational cycles.
Meets 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 fluid 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 FLeX coils, which include low-power, high-power, and 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 cc3)/min (1 drop/min).
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.

Back to Top

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
Response Time - Typical	50 ms50 ms
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
Switching Frequency	15,000 max. cycles/hr15,000 max. cycles/hr
Valve Hex Size	7/8 in.22,2 mm
Valve Installation Torque	20 - 25 lbf ft27 - 33 Nm
Model Weight	5.6 oz.159 grams
Seal kit - Cartridge	Buna: 990608007
Seal kit - Cartridge	Viton: 990608006

Back to Top

Performance Curve for DTAF: FLeX Series, 2-way, direct-acting, solenoid-operated directional blocking poppet valve

Back to Top

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 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.

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 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.

Back to Top

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

Highlights