3通, 全程可调, 旁路/节流, 优先流量控制阀

流量: 30 gpm120 L/min. | 插孔: T-17A
FREL : 3通, 全程可调, 旁路/节流, 优先流量控制阀
技术特性 [ + ]

该阀为全程可调,旁路/限流,优先流量阀。该阀从1口接受输入流量,并在3口得到优先流量。若输入流量大于优先流量要求,多余的流量通过2口旁路。优先流量经过压力补偿,可用于剧烈压力波动下的精确流量控制。2口可以堵住,此时相当于1口到3口带压力补偿的2通流量控制阀。

  • 优先流量和旁路流量在系统压力范围内保持稳定。
  • 不管输入流量如何变化,优先流量保持稳定。
  • 在满足优先流量之前,无法使用旁路流量。
  • 旁通口(口2)压力可以超出优先口(口3)压力。
  • 在优先油路被完全堵塞的工况下,旁路压降将会随时间增加,除非优先油路增加泄油。
  • 运用CFD流体仿真以获得优化的流道。
  • 疲劳和爆破压力等级高于NFPA测试标准T2.6.1 R2014。
  • 利用Sun浮动结构减少由于过量安装扭矩或插孔/插装阀加工误差带来的内部零件粘结的可能性。
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-17A
系列 3
通流能力 30 gpm120 L/min.
最大操作压力 5000 psi350 bar
粘度范围 35 - 2000 SUS2,8 - 380 cSt
调节 - 从全关到全开的逆时针圈数 55
典型阀泄漏,在110 SUS (24 cSt),1口到3口,5000 psi (350 bar)下 75 mL/min.75 mL/min.
Rated Maximum Priority 17.6 gpm66,5 L/min.
额定响应时间 50 ms50 ms
阀头部安装六角尺寸 1 1/4 in.31,8 mm
阀安装扭矩 150 - 160 lbf ft203 - 217 Nm
型号重量 1.20 lb0,55 kg
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 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.
额外来源 [ + ]