3通, 先导式, 换向阀 带内泄到口3 (口1到口2打开, 口3关闭)
先导控制,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。
- 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。
- 防止阀芯动作,3口可被堵塞。
- 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。
- 当先导压力超过阀的设定值时,先导流量就需要考虑。请参考阀压力值设定以上时,阀的先导泄流性能和负载压力曲线。如果这是个需要注意的问题,制动式应该是更好的选择。
- 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 | 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. |
控制先导流量 | 7 - 10 in³/min.0,11 - 0,16 L/min. |
110 SUS (24 cSt)下的最大泄漏 | 1 in³/min.@1000 psi15 cc/min.@70 bar |
调节 - 从最小设定到最大设定的顺时针圈数 | 55 |
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 |
调节螺栓的内六角尺寸 | 5/32 in.4 mm |
锁紧螺母六角尺寸 | 9/16 in.15 mm |
锁紧螺母力矩 | 80 - 90 lbf in.9 - 10 Nm |
型号重量 | .60 lb0,30 kg |
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.
DP**s and DR**s are from the reducer/reliever family and are very capable of modulating. They are not bistable.
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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