外接口控制, 先导式, 平衡锥阀 溢流阀
外接口控制,先导控制式,平衡锥阀结构溢流阀为常闭压力调节阀。当进口(口1)压力达到阀设定值,阀开始向油箱(口2)溢流,节流以调节压力。此类阀在主级活塞和先导级之间提供了一个外接口(口3),可以接入其它先导级控制阀或2通阀实现远程控制。此类阀压力调节精度高,压力波动随流量变化小,并且调节平稳,噪声小,响应速度适中。
- 因为调节发生在阀的内部,所以这些阀不会出现与气蚀相关的问题,即噪音和阀块腐蚀。
- 适合于负载锁紧应用中,但是需保持外控口(口3)处泄漏为零。
- 配置EPDM密封圈的插装阀可用在磷酸酯液压油系统。暴露在石油基液压油或润滑油脂中会损坏密封圈。
- 可在口2接受最大压力;适合应用在交叉端口的溢流油路中。
- 口3(外接口)处的远程先导溢流阀可以控制此阀压力低于设定值。
- 此阀对变动的油液温度和油液污染不敏感。
- 主级的阻尼孔被150微米的不锈钢滤网保护。
- 油箱口(口2)处的背压直接以1:1的比例增加到阀的设定值上。
- 利用Sun浮动结构减少由于过量安装扭矩或插孔/插装阀加工误差带来的内部零件粘结的可能性。
插孔 | T-17A |
系列 | 3 |
通流能力 | 50 gpm200 L/min. |
最大操作压力 | 5000 psi350 bar |
工厂默认的设定值 | 4 gpm15 L/min. |
控制先导流量 | 15 - 20 in³/min.0,25 - 0,33 L/min. |
回座时最大泄漏 | 10 drops/min.0,7 cc/min. |
额定响应时间 | 2 ms2 ms |
调节 - 从最小设定到最大设定的顺时针圈数 | 55 |
阀头部安装六角尺寸 | 1 1/4 in.31,8 mm |
阀安装扭矩 | 150 - 160 lbf ft203 - 217 Nm |
调节螺栓的内六角尺寸 | 5/32 in.4 mm |
锁紧螺母六角尺寸 | 9/16 in.15 mm |
锁紧螺母力矩 | 80 - 90 lbf in.9 - 10 Nm |
型号重量 | 1.60 lb0,70 kg |
Seal kit - Cartridge | Buna: 990217007 |
Seal kit - Cartridge | Polyurethane: 990217002 |
Seal kit - Cartridge | Viton: 990217006 |
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.
设置压力的误差在产品的性能参数页中都有详细说明,您可以通过点击可选产品网页中的更多产品信息到达产品性能参数页面。
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.
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.
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