直动式 溢流阀 - 先导流量

流量: 2.5 gpm10 L/min. | 插孔: T-8A
RBAE : 直动式 溢流阀 - 先导流量
技术特性 [ + ]

此类2口,先导级直动式溢流阀为全调,常闭压力调节阀。当口1(进口)压力足够克服弹簧力,阀开启产生从口1到口2(油箱)的溢流。此类阀用来作先导级且插孔尺寸为T-8A, 所以它常与SUN先导控制的主级阀配合使用。

  • 利用Sun的T-8A 2口插孔可以很好地组合使用Sun主级阀的先导级或外接口控制阀。只需要加工一个插孔来实现控制级和主级功能,从而消除了单独的先导油路。注意:所有2位2通的先导级控制阀使用相同的插孔并在外形尺寸上可互换。故只需要考虑功能上的需求。
  • 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。
  • 口1和口2可以加压到5000 psi (350 bar)。
  • 硬化的阀芯和阀座使阀具有一致性操作,低的阀芯泄漏速率和优越的耐磨特性。
  • 口2(出口)处的背压直接加到口1(进口)处的压力设定上。
  • 配置EPDM密封圈的插装阀可用在磷酸酯液压油系统。暴露在石油基液压油或润滑油脂中会损坏密封圈。
  • 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-8A
系列 P
通流能力 2.5 gpm10 L/min.
最大操作压力 5000 psi350 bar
工厂默认的设定值 2 in³/min.30 cc/min.
110 SUS (24 cSt)下的最大泄漏 15 drops/min.1 cc/min.
额定响应时间 2 ms2 ms
阀头部安装六角尺寸 7/8 in.22,2 mm
阀安装扭矩 20 - 25 lbf ft27 - 33 Nm
调节螺栓的内六角尺寸 5/32 in.4 mm
Locknut Hex Size 9/16 in.15 mm
Locknut Torque 80 - 90 lbf in.9 - 10 Nm
Seal kit - Cartridge Buna: 990608007
Seal kit - Cartridge EPDM: 990608014
Seal kit - Cartridge Polyurethane: 990008002
Seal kit - Cartridge Viton: 990608006
性能曲线 [ + ]
常见问题 [ + ]

Direct acting valves are used to prevent over pressure and pilot operated valves are used to regulate pressure. If you are unsure, use a direct acting valve. Sun's direct acting valves are very fast, dirt tolerant, stable, and robust. Sun's pilot operated valves are moderately fast, they have a low pressure rise vs. flow curve, and they are easy to adjust.

设置压力的误差在产品的性能参数页中都有详细说明,您可以通过点击可选产品网页中的更多产品信息到达产品性能参数页面。

One graphic example is on a portable grain auger for silos. When the farmer gets caught in the auger the kick-down relief trips and allows him to escape.

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

Maybe not. We build in a good amount of overlap in the kick-down reliefs to prevent false tripping. This means they are not as fast as our standard pilot operated reliefs. A direct-acting relief valve set just above the kick-down relief valve would be good insurance.

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 [ + ]
  • 对于采用O控制(旋钮调节,带面板锁)的系列1插装阀,面板上需要留一个直径0.75 in. (19 mm)的孔。
额外来源 [ + ]