电比例 3通 流量控制阀, 进口节流

流量: 9 gpm34 L/min. | 插孔: T-11A
FMDA : 电比例 3通 流量控制阀, 进口节流
技术特性 [ + ]

此阀是一个3通,进口节流,电比例节流阀。电磁线圈失电时,油路为供油口1口不通,口2通过口3处的油箱泄油。线圈得电时,在口1到口2方向上此阀将形成一个与电流大小成比例的节流口。此阀在口1到口2方向上具有自补偿效果,当接入外部压力补偿器时,此阀可提供压力补偿流量控制。口2到口3方向的流量不成比例,并且受限于增加的分辨率和流通能力。口2到口3方向上流通能力为1.5 gpm(6 L/min)。此阀用在有单独支路回油箱的油路中,例如排气回路。排气回路中两个FMDA的组合使用可以建立起进/出口节流的三位四通方向阀。

  • 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。
  • 所有口耐压为5000psi(350bar)
  • 在使用“D”或“L”控制的方式中,这种人工的制动装置只是应用于紧急制动。这种“D”、"E"、“L”或“T”型的人工控制装置大约有7000次的机械寿命。
  • 瞬时/旋转重载选项“E”允许操作者顺时针旋转手动重载装置90度以切换阀。
  • 线圈可与SUN其他电磁流量阀互换,同时它可以以任意方向安装。
  • 未获得最好性能,需要使用带有颤振信号的电流式放大器。颤振信号调节范围为100-250Hz。
  • 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
名义死区(一定的输出) 30%30%
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.
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 .75 in.19 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
型号重量(带线圈) 1.10 lb0,50 kg
Seal and nut kit - Coil Viton: 990770006
Seal kit - Cartridge Buna: 990411007
Seal kit - Cartridge Viton: 990411006
性能曲线 [ + ]
常见问题 [ + ]

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.

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

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。
额外来源 [ + ]
Coil Information [ + ]

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