2 Voies, à action directe électro-proportionnel, compensé en pression contrôle de débit Valve avec Clapet de By-Pass
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Normally closed, electro-proportional pressure-compensated flow control with reverse-flow check valves provide precise flow regulation for meter-in or meter-out applications where there may be wide pressure fluctuations. They are proportional from nearly closed up to the maximum flow. An integral high-capacity check valve provides unrestricted flow from port 2 to port 1.
- Designed and tested to 5-million operational cycles at full-rated pressure.
- For optimum performance, an amplifier with current sensing and adjustable dither should be used. Dither should be adjustable between 80 - 250 Hz.
- Exceeds new NFPA test standard T2.6.1 R2014 for fatigue and burst pressure ratings.
- Designed using CFD simulation for optimized geometries.
- 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.
- This cartridge utilizes both 740 Series high-power and 747 Series hazardous location coils.
- This valve is fully compatible with the XMD Expandable Mobile Drivers from Sun.
- Une large gamme d’options de connexions et de tensions d’alimentation des bobines est disponible, avec ou sans diode "Roue Libre" anti-self. Voir la section CONFIGURATION.
- Coils can be mounted on the tube in either direction.
Cavité | T-16A |
Taille | 3 |
Capacité | 30 gpm120 L/min. |
Pression maximale de fonctionnement | 5000 psi350 bar |
Gamme de Viscosité | 35 - 2000 SUS2,8 - 380 cSt |
Temps de Réponse - Typique | 50 ms50 ms |
Fréquence de commutation | 3,600 max. cycles/hr3,600 max. cycles/hr |
Diamètre du Doigt de Gant | 0,63 in.16 mm |
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 |
Seal kit - Cartridge | Buna: 990016007 |
Seal kit - Cartridge | Viton: 990016006 |
Seal and nut kit - Coil | Viton: 990740006 |
Hystérésis (avec dither) | B-spool: 10%, C-spool: 9%B-spool: 10%, C-spool: 9% |
Linéarité (avec dither) | 3%3% |
Répétabilité (avec dither) | 1.5%1.5% |
Fréquence de dither recommandée | 100 Hz100 Hz |
Zone morte nominale (pourcentage du débit d'entrée) | B-spool: 35%, C-spool: 35%B-spool: 35%, C-spool: 35% |
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.
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.
- Encore Une Solution Optimisée par Sun Hydraulics !
- SUNs kleinste 2- und 3-Wege Druckminderventile bieten beste Eigenschaften auch bei kleinen Volumenströmen.
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