Bi-direccional , acción-directa alivio válvula - common cavity
The bi-directional, direct-acting relief cartridge is a normally closed, pressure-limiting valve used to protect hydraulic components from pressure transients. When the pressure differential between ports 1 and 2 exceeds the valve setting, the valve starts to open, throttling flow to limit the pressure rise, regardless of the direction.
- Because the modulating occurs inside the cartridge, these valves are immune to most of the problems associated with cavitation, namely manifold erosion.
- The seals on the adjust screw are exposed to system pressure which means this valve can only be adjusted when the pressure is removed. The setting procedure is; check the setting, remove the pressure, adjust the valve, check the new setting.
- Valve is relatively insensitive to varying oil temperatures and oil borne contamination.
- Select a spring range where the desired relief setting is approximately mid-range to high between the minimum and maximum pressure to ensure maximum valve repeatability.
| cavidad | SC-10-02 |
| Series | 1C |
| Capacity | 20 gpm80 L/min. |
| Maximum Operating Pressure | 5000 psi350 bar |
| Factory Pressure Settings Established at | 2 in³/min.30 cc/min. |
| Reseat | >85% of setting>85% of setting |
| Adjustment - No. of CW Turns from Min. to Max. setting | 3.03.0 |
| Valve Hex Size | 25 mm25 mm |
| Valve Installation Torque | 23 - 26 lbf ft31 - 35 Nm |
| Adjustment Screw Internal Hex Size | 5/32 in.4 mm |
| Locknut Hex Size | 5/8 in.16 mm |
| Locknut Torque | 5 - 7 lbf ft5 - 7 lbf ft |
| Model Weight | .40 lb0,20 kg |
| Seal kit - Cartridge | Buna: 99C102007 |
| Seal kit - Cartridge | Viton: 99C102006 |
Pressure setting tolerances are listed in our Performance Data page. A link to this page can also be found in the Additional Resources tab of the applicable product page.
There are exactly 250 Sun drops in a cubic inch or 15 in a cc.
Maybe not. We build in a good amount of overlap in the kick-down reliefs to prevent false tripping. This means they are not as fast as our standard pilot-operated reliefs. A direct-acting relief valve set just above the kick-down relief valve would be good insurance.
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.
One graphic example is on a portable grain auger for silos. When the farmer gets caught in the auger the kick-down relief trips and allows him to escape.
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