20:1 比例, 先导关闭 单向阀
此阀为弹簧偏置关闭,先导压力比20:1的先导关闭单向阀。此阀可以让油液从口1到口2流动但是阻止反向液流。先导口(口3)的压力以20:1的比率对抗口1压力。
- 2口的压力直接反作用于先导压力。
- 在任何情况下,反向流量从2口流向1口都是不可能的。
- 这种阀是锥阀结构设计,对于蓄能器所储存的油液有很小的泄漏。
- 当阀关闭时,所有口的压力都相等。
- 性能相当于一个0.109in(2.8mm)直径的小孔。
- 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。
- Sun浮动式的结构可以最大限度地减少由于过大的安装扭矩以及孔型加工的误差所造成的干涉现象。
插孔 | T-11A |
系列 | 1 |
通流能力 | .11 in.2,8 mm |
最大操作压力 | 5000 psi350 bar |
110 SUS (24 cSt)下的最大泄漏 | 1 drops/min.0,07 cc/min. |
阀头部安装六角尺寸 | 7/8 in.22,2 mm |
阀安装扭矩 | 30 - 35 lbf ft41 - 47 Nm |
Seal kit - Cartridge | Buna: 990011007 |
Seal kit - Cartridge | EPDM: 990011014 |
Seal kit - Cartridge | Polyurethane: 990011002 |
Seal kit - Cartridge | Viton: 990011006 |
There are exactly 250 Sun drops in a cubic inch or 15 in a cc.
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.
Because of the very high ratio, the COFO has limited capacity. The discharge path is across a .050 inch (1,3 mm) diameter orifice. If you have large accumulators combined with low precharge pressures, this may not discharge the energy quickly enough. Using the COFO XDN cartridge in conjunction with an LODA XDN will provide capacity for larger applications.
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