电比例 3通 流量控制 阀, 进口节流 (740 Series)

流量: 9 gpm34 L/min. | 插孔: T-11A
FMDF : 电比例  3通 流量控制 阀, 进口节流 (740 Series)
技术特性 [ + ]

该阀是一个3通,进口节流,电比例节流阀。在未通电的情况下,1口被堵住,2口通过3口卸荷回油箱。线圈通电时产生闭合力在阀芯上,1口到2口之间形成节流孔,该节流孔大小与线圈电流成正比。该阀在1口到2口的方向上具有自补偿效果,若加上一个外部补偿器,将提供压力补偿流量控制。2口到3口方向的流量不成比例,为了提高分辨率和通流能力而受到限制。2口到3口的流量约为1.5 gpm(6L/min)。这种阀用于有单独回油通道的回路,如缓冲锁止回路。两个FMDFs结合缓冲锁止回路可形成进口节流/出口节流的3位4通回路。

  • 注意:2口流向3口的流量限定大约为1.5gpm(5L/min)
  • 换向过程中工作口相互不通。
  • 可以使用2个3通的阀来实现4通的功能。
  • 这些阀或许需要通过外部调节逻辑阀提供压力补偿。对并联回路采用LR*C-XHN,或者对于节流回路采用LP*C-XHN。
  • 这款阀提供一定程度的自我补偿,可以用于流量控制。为提高流量控制的精准度,外部的逻辑调节阀可以用来保证大范围流量和压力情况下稳定的流量。可参考附加信息中的曲线。
  • 为了获得更好的性能,应当使用带颤振调节功能(100-250Hz)和电流反馈的放大器。
  • 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
比例性能数据 [ + ]
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。
滞环(在颤振作用下) <4%<4%
直流驱动下滞环 <8%<8%
线性度(在颤振作用下) <2%<2%
Repeatability (with dither) <2%<2%
推荐颤振频率 140 Hz140 Hz
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 9 gpm34 L/min.
最大操作压力 5000 psi350 bar
110 SUS (24 cSt)下的最大泄漏 2 in³/min.@1000 psi30 cc/min.@70 bar
手动紧急操作需要的力 5 lbs/1000 psi @ Port 133 N/100 bar @ Port 1
手动紧急操作动作行程 .10 in.2,5 mm
衔铁直径 .63 in.16 mm
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
性能曲线 [ + ]
常见问题 [ + ]

All flow is blocked, hence the term priority. The priority flow has to be satisfied.

The valve acts as a 2 port restrictive flow control.

The spring force in our flow controls equates to about 100 psi (7 bar). This is high enough to give the valves acceptable capacity (not really) and not too high for proper circuit operation. 100 psi (7 bar) is the spring force; at the upper end of the flow control's range, the drop through the valve will be as high as 250 psi (17 bar) before it starts modulating.

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

In a meter-in flow control circuit if the pump is set at 3000 psi and the load is 2000 psi the drop through the flow control is 1000 psi. In a meter-out circuit with the load at 2000 psi the drop through the flow control is 2000 psi.

We claim +/- 10%. We set to +/- 5% in production testing to allow for differences in customers' conditions. If you want accuracy, stay in the bottom 2/3rds of the range. Our 12 gpm (45 L/min.) flow controls are quite flat at 9 gpm (34 L/min.) and dead flat below 6 gpm (23 L/min.), until you get to the bottom of the range. Below about .25 gpm (1 L/min.), spool leakage and orifice conditions start to limit accuracy.

I am afraid not. Unless you are overflowing your current valve and correctly size ours, you are not likely to notice any improvement. Priority flow controls are not efficient devices. They are an easy way to get more than 1 source of oil from 1 pump but they can generate a lot of heat. Try to size your actuators so the pressures are similar on both the priority and the bypass circuits. If you can't do that, try to have the lower flow leg be the lower pressure. The pump pressure is determined by whichever leg is higher and if there is flow that is taking a pressure drop that is not doing work it is creating heat.

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.
备注 [ + ]
  • 当选择Sun阀块时,请检查插装阀的间隙要求。不同的阀控制方式以及线圈要求的间隙不一样。
  • 在阀的最大尺寸之外需增加额外的2.00 inches (50,8 mm),以进行线圈的安装和移除。
额外来源 [ + ]
Coil Information [ + ]

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