外接口控制, 固定节流口, 旁路/节流, 优先流量控制阀 带集成T-8A控制插孔

流量: 25 gpm95 L/min. | 插孔: T-23A
FVEA8 : 外接口控制, 固定节流口, 旁路/节流, 优先流量控制阀 带集成T-8A控制插孔
技术特性 [ + ]

此类阀为带外控口,旁通/节流,固定节流口并带集成先导级控制插孔的优先流量控制阀。先导级控制插孔可以接入其它T-8A先导级压力阀或方向阀。它接受口1的输入流量,并用来满足口3的优先流量。如果输入流量超出优先流量需求,多余的流量经口2旁通流出。旁通流量可用于次级油路。根据安装在T-8A插孔中的先导级控制阀,优先流量调节方式可以电动,手动,液动或者气动。

  • 客户必须指定一个流量等级。出厂流量设定值在指定设定值的+/- 10%范围内。
  • T-8A先导级控制插孔处的压力控制将限制优先口(口3)的压力。如果旁通口(口2)的压力超过压力控制的设定值,优先流量将被关闭且所有液流将通过旁通口流出。
  • 口3处的最大压力应降限制在3000 psi (210 bar)以内。
  • 注意:带-8控制选项,应首先用正确的扭矩安装主级阀。然后用合适的扭矩将T-8A先导级控制阀安装进主级阀中。
  • 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。
  • 除了阀外接口接通油箱之外,在满足优先流量之前,无法使用旁路流量。当口4(外接口)接通油箱时,且如果口1(进口)压力为150 psi (10,5 bar)或比之高,所有液流则将通过口2流出。
  • 旁通口(口2)压力可以超出优先口(口3)压力。
  • 锐边节流口设计可有效减少因粘度变化引起的流量波动。
  • -8控制类型允许通过T-8A插孔将先导级控制阀直接旋进此阀顶部。这些先导级控制阀需单独采购并包括电比例,电磁,气控先导,液控先导操作。请参照先导级控制阀。
  • 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-23A
系列 3
通流能力 25 gpm95 L/min.
最大操作压力 5000 psi350 bar
额定外泄流量 46 in³/min.0,75 L/min.
最大输入流量 60 gpm240 L/min.
先导控制孔型 T-8AT-8A
先导控制阀安装扭矩 20 - 25 lbf ft27 - 33 Nm
先导控制阀安装尺寸 7/8 in.22,2 mm
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 1.40 lb0,65 kg
Seal kit - Cartridge Buna: 990023007
Seal kit - Cartridge Polyurethane: 990023002
Seal kit - Cartridge Viton: 990023006
性能曲线 [ + ]
常见问题 [ + ]

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.

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.

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 [ + ]
  • 组合插装阀(先导级和主级)集成块的信息仅供参考。插装阀必须单独订购并在使用时进行装配。
额外来源 [ + ]