直动式 溢流阀

流量: 50 gpm200 L/min. | 插孔: T-3A
RDFA : 直动式 溢流阀
技术特性 [ + ]

直动式溢流阀为常闭压力限制阀,常用来保护液压元件,以防止其受瞬态压力的冲击。当压力在进口(口1)达到阀的设定值,阀开始向油箱(口2)溢流,节流以限制压力上升。此类阀调节平稳、噪声小,基本为零泄漏,抗油 污能力强,防堵塞并且响应速度快。

  • 所有2口溢流阀(除了先导溢流阀)在尺寸和功能上可互换(如:给定的外形结构尺寸阀拥有相同的流道,相同的插孔)。
  • 可在口2接受最大压力;适合应用在交叉端口的溢流油路中。
  • 调节螺杆的密封暴露在系统压力下。这意味着只有当压力被移除时,此阀才可被调节。设定流程为;检查设定,移除压力,调节阀,检查新设定。
  • 此阀对变动的油液温度和油液污染不敏感。
  • 选择溢流阀的弹簧范围时,为确保最大的可重复性,目标溢流设定值要接近最小和最大压力的中间范围。
  • 适合使用在负载锁紧应用中。
  • 油箱口(口2)处的背压直接以1:1的比例增加到阀的设定值上。
  • 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。
  • Test pressure for each range is as follows: A range - 2000 psi (138 bar), B range - 1000 psi (69 bar), C range - 4000 psi (276 bar), D range - 800 psi (55 bar), E range - 400 psi (28 bar), S range - 150 psi (10 bar), W range - 3000 psi (207 bar).
  • Reseat meets or exceeds 90% of crack pressure at test setting. Settings lower than the test pressure may result in lower reseat percentages.
  • 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-3A
系列 2
通流能力 50 gpm200 L/min.
工厂默认的设定值 4 gpm15 L/min.
最大操作压力 5000 psi350 bar
回座时最大泄漏 10 drops/min.0,7 cc/min.
额定响应时间 2 ms2 ms
复位 >90% of setting>90% of setting
Adjustment - No. of CW Turns from Min. to Max. setting 66
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
Locknut Hex Size 9/16 in.15 mm
Locknut Torque 80 - 90 lbf in.9 - 10 Nm
型号重量 .50 lb0,25 kg
Seal kit - Cartridge Buna: 990303007
Seal kit - Cartridge EPDM: 990303014
Seal kit - Cartridge Polyurethane: 990303002
Seal kit - Cartridge Viton: 990303006
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.
额外来源 [ + ]