先导关闭 单向阀

流量: 20 gpm80 L/min. | 插孔: T-11A
CODA : 先导关闭 单向阀
技术特性 [ + ]

此阀为弹簧偏置关闭，先导压力比1.8：1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。先导口的压力以1.8：1的比率对抗口1压力。此阀经常应用在再生回路中。

  • 阀芯与阀套之间非常小的间隙，以及先导活塞中良好的密封，最大限度地减少了污染物淤积的可能。
  • 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。
  • 在任何情况下，反向流量从2口流向1口都是不可能的。
  • 当阀关闭时，所有口的压力都相等。
  • 设计初期，CO*A在先导活塞处是没有完全密封，而CO*B是完全密封。现在CO*A也采用了完全密封，两者只是结构上的不一样。CO*A适用性更广而且价格更低。
  • 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。
  • 抗腐蚀阀是针对腐蚀环境下使用的，其型号通过后缀“/AP”区分（查阅如下可选项）。外部零件是由不锈钢，同时可能的情况下带有钛或者黄铜，内部的零件由碳钢制作，就如同标准阀。如需要知道更详细的信息，请查看结构材料页面。
  • 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。
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技术数据 [ + ]
注意：技术参数可能因产品配置而不同。请查看产品配置部分。
插孔 T-11A
系列 1
通流能力 20 gpm80 L/min.
最大操作压力 5000 psi350 bar
先导比 1.8:11.8:1
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
型号重量 .30 lb0,15 kg
Seal kit - Cartridge Buna: 990011007
Seal kit - Cartridge EPDM: 990011014
Seal kit - Cartridge Polyurethane: 990011002
Seal kit - Cartridge Viton: 990011006
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性能曲线 [ + ]
Performance Curve for CODA: 先导关闭 单向阀 Performance Curve for CODA: 先导关闭 单向阀
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常见问题 [ + ]
How big is a drop of hydraulic oil?  

There are exactly 250 Sun drops in a cubic inch or 15 in a cc.

Direct acting, pilot operated, what do I use?

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.

I need to discharge a large accumulator. How can I increase the capacity of my discharge circuit?

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.

What parts of the Sun cartridge valve are field serviceable?
Only external seals are serviceable.  Sun offers replacement seal kits for all cartridge models. The applicable kit part number can be found in the product page's Technical Data table or by using our Cartridge Seal Kit search function located under Accessories. Please note: Converting the external seals from one material to another does not ensure fluid compatibility with that material due to the existence of internal seals within the cartridge.
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额外来源 [ + ]
集锦
技术指导
技术信息
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