Électro-proportionnel, à action directe réducteur de pression 3 Voies Valve avec filtre de protection, 3000 psi (210 bar) - common cavity
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This electro-proportional, direct-acting reducer/reliever valve reduces a high primary pressure at the inlet port (Port 2) to a constant reduced pressure at Port 1, with a relief function from Port 1 to tank (Port 3). The valve is biased to the relieving mode. Energizing the coil connects Port 2 to Port 1. Increasing the current to the coil will proportionally increase the reduced pressure at Port 1. If pressure at Port 1 exceeds the setting induced by the coil, pressure at port 1 is relieved to port 3. This valve is closed in the transition between reducing and relieving resulting in very low consumption of oil.
- The solenoid tube assembly is fatigue rated for 3000 psi (210 bar) service.
- Pressure at port 3 is directly additive to the valve setting at a 1:1 ratio.
- This valve features a filter installed on port 2 with a micron rating of 280.
- Specified leakage is out of port 3, with 3000 psi (210 bar) at port 2 and port 1 deadheaded.
- For best performance, an amplifier with current sensing and adjustable dither should be used. Recommended dither is 200 Hz.
- This valve is available with a push-type manual override. There is no upper limit to the pressure setting when using the M control. The more force you exert on the manual override, the higher the resulting pressure. This option is also rated for 3000 psi (210 bar).
- The cartridge installation torque of 22 lbf ft (30 Nm) should be respected for best performance.
- Full reverse flow from reduced pressure (port 1) to inlet (port 2) may cause the spool to close. If reverse free flow is required in the circuit, consider adding a separate check valve to the circuit.
- The metal coil nut is a functional feature of the valve and should be correctly installed for proper performance of the valve.
- Coil connector options offer ratings up to IP67. See individual coil product pages for details.
- Coils can be mounted on the tube in either direction.
Cavité | SC-08-03 |
Taille | 0C |
Capacité | 1 gpm4 L/min. |
Pression maximale de fonctionnement | 3000 psi210 bar |
Typical Valve Leakage at 110 SUS (24cSt) | 0.3 in³/min.@3000 psi4,5 mL/min.@210 bar |
Diamètre du Doigt de Gant | .51 in..51 in. |
Dimensions du six pans de la valve | 7/8 in.22,2 mm |
Couple de Serrage de l'Ecrou de la Bobine | 3.5 - 3.9 lbf ft4,8 - 5,3 Nm |
Couple de serrage de la valve | 21 - 23 lbf ft28 - 31 Nm |
Poids du composant | 0,35 lb0,15 kg |
Yes. A reducing or reducing/relieving valve is normally open. If the pressure in the secondary circuit is less than the setting, it will be open.
2 caveats: (1) If the valve is in the reducing mode and you suddenly reverse the flow, the valve will not have time to open and will shift into relieving mode or (2) If the back flow generates a pressure drop through the valve that exceeds the setting, the valve will shift into the relieving mode.
When in doubt, use a reverse flow check.
Yes. If you look in the sandwich section you will see that we offer many such packages. When you are pressurizing B, A is connected to tank, allowing the reducer to do its job. When you reverse, the drain or tank port of the reducer is pressurized by A. This increases the setting of the reducer and helps keep the reducer open in the reverse flow direction.
Pour les pressions de tarage les tolérances sont indiquées dans notre page Performances et Caractéristiques Générales. Un lien vers cette page se trouve également dans l’onglet Ressources Complémentaires de la page produit correspondante.
Our reducing valves are outside-in valves; the supply pressure on the outside of the working parts is higher than the inside. At some pressure differential, the outside (sleeve) will close in on the piston and cause the valve to stick. A D range is adjustable from 25 to 800 psi with a maximum differential of 2000 psi. This means you could set the valve at 600 psi and expect it to work correctly with a supply pressure of 2600 psi. The valve may work at higher differentials, but we do not recommend it. The W and C ranges are tested over their entire range with an inlet pressure of 5000 psi. All direct-acting valves are tested with an inlet pressure of 5000 psi.
No. A reducing/relieving valve throttles a supply of oil to maintain a set pressure in a secondary circuit. The valve is open until the secondary or downstream pressure rises to the setting of the valve at which time it starts to close to limit the pressure. If the secondary or downstream pressure is caused to go above the setting, the valve shifts into relieving mode and throttles the secondary circuit back to tank to prevent over-pressure. At no time can the valve connect the supply to tank.
Il y a exactement 15 gouttes Sun dans un centimètre cube.
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.
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