外接口控制, 固定节流口, 旁路/节流, 优先流量控制阀

流量: 12 gpm45 L/min. | 插孔: T-22A
FVDA : 外接口控制, 固定节流口, 旁路/节流, 优先流量控制阀
技术特性 [ + ]

带外控口,旁通/节流,固定节流口,优先流量控制阀接受口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。外控口(口4)允许对此类阀远程控制。

  • 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。
  • 口4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。
  • 配置EPDM密封圈的阀适用于磷酸酯油,暴露在石油基液压油或润滑油中将会损坏EPDM密封圈。
  • 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。
  • 可调控制选项可以使阀在出厂预设流量的+/- 25%范围内调节。可对调节螺杆进行+/- 3圈调整。旋进(顺时针)螺杆可增加流量。
  • 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-22A
系列 2
通流能力 12 gpm45 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 30 gpm120 L/min.
阀头部安装六角尺寸 1 1/8 in.28,6 mm
阀安装扭矩 45 - 50 lbf ft61 - 68 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 .40 lb0,20 kg
Seal kit - Cartridge Buna: 990022007
Seal kit - Cartridge EPDM: 990022014
Seal kit - Cartridge Polyurethane: 990022002
Seal kit - Cartridge Viton: 990022006
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 [ + ]