FLeX Series 3 Voies, à action directe, électro-proportionnel, balance de pression 2 voies / 3 voies, à débit prioritaire contrôle de débit Valve
This valve is a normally closed, electro-proportional, bypass/restrictive, priority flow control valve. The valve takes an input flow at port 1 and uses it to satisfy the priority flow at port 3. If the input flow exceeds the priority requirement, the excess is bypassed out port 2.
The valve pressure compensates the priority flow for precise flow regulation for applications where there may be wide pressure fluctuations. Port 2 may also be completely blocked so that the valve can be used as a 2-way, electro-proportional pressure compensated flow control from 1 to 3.
- The valve's patent-pending design uses a pull-type solenoid that allows the main throttle spool to be less sensitive to flow forces, resulting in greater efficiencies, with more flow control using less power.
- FLeX Series proportional valves are fully compatible with the XMD Expandable Mobile Drivers from Sun.
- Designed and tested to 10 million on-off operational cycles.
- Exceeds new NFPA test standard T2.6.1 R2014 for fatigue and burst pressure ratings.
- 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.
- This valve can be used with both the 740 Series high-power coils and 747 Series hazardous location coils.
- A wide variety of coil termination and voltage options are available, with and without surge protection. See the CONFIGURATION section.
- Coil connector options offer ratings up to IP69K. See individual coil product pages for details.
- Both, priority and bypass flow, are usable up to the system operating pressure.
- For optimum performance, an amplifier with current feedback and adjustable dither (80 - 250 Hz) should be used.
- Bypass flow is not available until priority flow requirements are satisfied.
- Pressure at the bypass port (port 2) may exceed pressure at the priority port (port 3).
- In applications where the priority flow will be blocked completely, bypass pressure drop will increase over time unless a leak path is provided for the priority flow.
- Priority flow remains relatively constant regardless of variation in input flow.
- The minimum bleed at port 3 must meet or exceed the published leakage numbers.
- Cette valve intègre le concept Sun de la cartouche à visser "flottante" qui permet de minimiser les contraintes internes dues à un couple de serrage excessif de la cartouche et/ou à des écarts d’usinage des cavités ou des cartouches.
| Cavité | T-17A |
| Taille | 3 |
| Capacité | 30 gpm120 L/min. |
| Pression maximale de fonctionnement | 5000 psi350 bar |
| Gamme de Viscosité | 35 - 2000 SUS2,8 - 380 cSt |
| Typical Valve Leakage at 110 SUS (24 cSt) from port 1 to port 3 at 1450 psi (100 bar) | 30 mL/min.30 mL/min. |
| Typical Valve Leakage at 110 SUS (24 cSt) from port 1 to port 3 at 5000 psi (350 bar) | 110 mL/min.110 mL/min. |
| Temps de Réponse - Typique | 50 ms50 ms |
| Fréquence de commutation | 3,600 max. cycles/hr3,600 max. cycles/hr |
| Dimensions du six pans de la valve | 1"1/4 in.31,8 mm |
| Couple de serrage de la valve | 150 à 160 lbf ft203 - 217 Nm |
| Poids du composant | 1,20 lb0,55 kg |
| Brevet Américain # | 10,969,03310,969,033 |
| Seal kit - Cartridge | Buna: 990017007 |
| Seal kit - Cartridge | Viton: 990017006 |
| Hystérésis (avec dither) | A-spool: 9%, B-spool: 7%, C-spool: 5%A-spool: 9%, B-spool: 7%, C-spool: 5% |
| Linéarité (avec dither) | A-spool: 2%, B-spool: 3%, C-spool 5%A-spool: 2%, B-spool: 3%, C-spool 5% |
| Répétabilité (avec dither) | 1.5%1.5% |
| Fréquence de dither recommandée | 100 Hz100 Hz |
| Zone morte nominale (pourcentage du débit d'entrée) | 25 %25 % |
In a meter-in flow control circuit if the pump is set at 3000 psi and the load is 2000 psi the drop through the flow control is 1000 psi. In a meter-out circuit with the load at 2000 psi the drop through the flow control is 2000 psi.
We claim +/- 10%. We set to +/- 5% in production testing to allow for differences in customers' conditions. If you want accuracy, stay in the bottom 2/3rds of the range. Our 12 gpm (45 L/min.) flow controls are quite flat at 9 gpm (34 L/min.) and dead flat below 6 gpm (23 L/min.), until you get to the bottom of the range. Below about .25 gpm (1 L/min.), spool leakage and orifice conditions start to limit accuracy.
I am afraid not. Unless you are overflowing your current valve and correctly size ours, you are not likely to notice any improvement. Priority flow controls are not efficient devices. They are an easy way to get more than 1 source of oil from 1 pump but they can generate a lot of heat. Try to size your actuators so the pressures are similar on both the priority and the bypass circuits. If you can't do that, try to have the lower flow leg be the lower pressure. The pump pressure is determined by whichever leg is higher and if there is flow that is taking a pressure drop that is not doing work it is creating heat.
All flow is blocked, hence the term priority. The priority flow has to be satisfied.
The valve acts as a 2 port restrictive flow control.
The spring force in our flow controls equates to about 100 psi (7 bar). This is high enough to give the valves acceptable capacity and not too high for proper circuit operation. 100 psi (7 bar) is the spring force; at the upper end of the flow control's range, the drop through the valve will be as high as 250 psi (17 bar) before it starts modulating.
Il y a exactement 15 gouttes Sun dans un centimètre cube.
Yes. All FLeX phase 1 valves are available in the SmartConnect schematic tool, and are also available for submittal to QuickDesign.
- Il est nécessaire de vérifier l'encombrement des cartouches lorsque vous sélectionnez un bloc foré. Différents types de valves, de dispositifs de contrôle, et de bobines nécessitent des encombrements disponibles différents.
- Pour permettre l'installation ou le retrait de la bobine il est nécessaire de prévoir une hauteur libre dans le prolongement du tube magnétique d'au moins 50,8 mm (2.00 in).
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