3通, 直动式, 固定设定, 换向阀 带口4外泄 (口1到口2打开, 口3关闭)
![DRBPX : 3通, 直动式, 固定设定, 换向阀 带口4外泄 (口1到口2打开, 口3关闭)](https://cmsimages.sunhydraulics.com/cartg_drbpx.gif)
直动式,3通换向阀(口1到口2打开,口3关闭)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4之间的压差超出设定时,此阀将切换。
- 3口可以作为工作油口。
- 2口和3口之间的流道是双向的。
- 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。
- 直动式和先导式的插装阀是可以相互替换的。他们复合相同的孔型,以及相同的流道。
- 4口的压力直接作用在阀的设定值上。
- 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。
- 在1口和2口之间的液流是双向的。
- 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-21A |
系列 | 1 |
通流能力 | 7 gpm28 L/min. |
最大操作压力 | 5000 psi350 bar |
工厂默认的设定值 | 4 gpm15 L/min. |
110 SUS (24 cSt)下的最大泄漏 | 2 in³/min.30 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 | .55 lb0,25 kg |
Seal kit - Cartridge | Buna: 990021007 |
Seal kit - Cartridge | Polyurethane: 990021002 |
Seal kit - Cartridge | Viton: 990021006 |
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.
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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