3通, 直动式, 固定设定, 换向阀 带内泄到口3 (口1关闭, 口2到口3打开)
直动式,3通换向阀(口1关闭,口2到口3打开)为切换装置,常用在中等流量油路中。它们可以单独使用或者用来驱动更大流量的先导控制换向阀或者逻辑阀。当口1与口3之间的压差超出设定时,此阀将切换。
- 3口的压力直接叠加到阀的设定值上。鉴于如此,3口不可以最为工作油口使用。如需使用3口,请考虑4口的插装阀。
- 由于采用了直动式的设计,这些阀具备了低内部泄漏以及低先导流量损失的特性。
- 这个阀并不是双稳态的;其在所示的两个位置之间是可以调节的。
- 3口的最大压力需要限制在3000psi(210bar)。这是基于疲劳强度的要求而非工作运行的要求。
- 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 | 10 gpm40 L/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 | 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.
In many circuits the directional cartridge is set to shift at a low pressure no matter how high the pilot pressure goes. If you use a DP__ , the pilot flow increases to significant amounts. A DR__ however will only consume a small amount of flow. A DP__ is useful when you want to block or open the pilot flow to shift the valve.
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