120:1 比例, 先导关闭 单向阀

流量: 1 gpm (.05 inch)4 L/min. (1,3 mm) | 插孔: T-2A
技术特性 [ + ]

此阀为先导关闭单向阀且先导压力比为120：1。此阀在泵关闭时用来排出蓄能器的液流。当泵口（口3）没有压力时，此阀使蓄能器（口1）与油箱（口2）接通。口3处60psi（4 bar）压力可以关闭蓄能器处至5000psi（350bar）的压力。当口3处泵压力降至300psi（20bar），口3 与油箱（口2）会形成泄漏通道，以确保当泵关闭时蓄能器排出液流。当泵压力上升到300psi（20bar）之上，泄漏通道关闭以提高功效。

  • 淬火钢特性的底座将有更好的耐磨性以及抗污染能力。
  • 注意：蓄能器的泄压是通过一个0.05in（1.27mm）直径的小孔。这个泄压时间对于大型的蓄能器，低的预压力也许意味着更长的时间。在这里具有2阀回路可以大大提高性能。请查看Tech Tips（FAQs）。
  • 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。
  • 当泵压力下降到300psi（20bar）以下的时候，将存在3口至2口的泄漏。
  • 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-2A
系列 2
通流能力 1 gpm (.05 inch)4 L/min. (1,3 mm)
最大操作压力 5000 psi350 bar
110 SUS (24 cSt)下的最大泄漏 5 drops/min.0,3 cc/min.
阀头部安装六角尺寸 1 1/8 in.28,6 mm
阀安装扭矩 45 - 50 lbf ft61 - 68 Nm
型号重量 .50 lb0,25 kg
Seal kit - Cartridge Buna: 990202007
Seal kit - Cartridge Polyurethane: 990002002
Seal kit - Cartridge Viton: 990202006
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性能曲线 [ + ]
Performance Curve for COFO: 120:1 比例, 先导关闭 单向阀 Performance Curve for COFO: 120:1 比例, 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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