Fixed-orifice, compensé en pression contrôle de débit Valve

Capacité: 0,5 gpm2 L/min. | Cavité: T-8A
FXAA : Fixed-orifice, compensé en pression contrôle de débit Valve
Caractéristiques techniques [ + ]

Les régulateurs de débit compensés en pression à orifice fixe, fonctionnent en entrée ou en sortie de récepteur et assurent une régulation précise du débit même en cas d’importantes fluctuations de la pression. Différents débits sont disponibles.

  • Accepte 350 bar (5000 psi) sur les orifices 1 et 2.
  • Les cartouches configurées avec des joints EPDM s’utilisent dans les systèmes avec des fluides ester phosphate. L’exposition de ces joints à des fluides à base de pétrole, de graisse ou de lubrifiant détériorera les joints.
  • Le gicleur à paroi mince minimise les variations de débit dues aux variations de viscosité.
  • Tolérances pour les débits : Plage A +/- 32 cm³/min (+/- 2.0 in³/min). Plage B +/- 40 cm³/min (+/- 2.5 in³/min). Plages D et F +/- 48 cm³/min (+/- 3.0 in³/min). Plages H et J +/- 64 cm³/min (+/- 4.0 in³/min). Plage L +/- 72 cm³/min (+/- 4.5 in³/min).
  • 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.
Caractéristiques [ + ]
Remarque: Les caractéristiques peuvent changer selon la configuration. Voir la section CONFIGURATION.
Cavité T-8A
Taille P
Capacité 0,5 gpm2 L/min.
Pression maximale de fonctionnement 5000 psi350 bar
Dimensions du six pans de la valve 7/8 in.22,2 mm
Couple de serrage de la valve 20 à 25 lbf ft27 - 33 Nm
Seal kit - Cartridge Buna: 990008007
Seal kit - Cartridge EPDM: 990008014
Seal kit - Cartridge Polyurethane: 990008002
Seal kit - Cartridge Viton: 990008006
Performance Curves [ + ]
FAQs [ + ]

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.

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.

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.
Ressources Complémentaires [ + ]