先导关闭 单向阀 带旁通节流孔
![CNJE : 先导关闭 单向阀 带旁通节流孔](https://cmsimages.sunhydraulics.com/cartg_cnje.gif)
此阀为弹簧偏置关闭带旁路节流孔的先导关闭单向阀。它具有钢质阀座并且为非透气型。它允许液流从口1向口2自由流动,口2到口1节流。先导口(口3)的压力以1.8:1的比率对抗口1压力。口2压力将直接抵抗先导压力。注意:旁路节流孔的直径由客户指定。参考下面的技术数据以便选取可行的节流孔范围。
- 淬火钢特性的底座将有更好的耐磨性以及抗污染能力。
- 名义先导比为1.8:1。这意味着先导压力为1000psi(70bar),可以抵消1800psi(125bar)的1口压力。不管先导压力衰退或者消失,即便是非常短暂,阀亦会打开。
- 2口的压力直接反作用于先导压力。
- 当阀关闭时,所有口的压力都相等。
- 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-19A |
系列 | 4 |
通流能力 | 160 gpm610 L/min. |
节流孔范围 | .016 - .354 in.0,4 - 9 mm |
阀头部安装六角尺寸 | 1 5/8 in.41,3 mm |
阀安装扭矩 | 350 - 375 lbf ft474 - 508 Nm |
Seal kit - Cartridge | Buna: 990019007 |
Seal kit - Cartridge | Polyurethane: 990019002 |
Seal kit - Cartridge | Viton: 990019006 |
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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