RPGC | 插装阀 » Pressure Control » 溢流阀

先导控制式，平衡滑阀结构溢流阀为常闭压力调节阀。当进口（口1）压力达到阀设定值，阀开始向油箱（口2）溢流，节流以调节压力。此类阀压力调节精度高，压力波动随流量变化小，并且调节平稳，噪声小，响应速度适中。

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。如果应用在交叉端口的溢流油路中，请考虑滑阀泄漏。
主级的阻尼孔被150微米的不锈钢滤网保护。
因为滑阀的泄漏，不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。
W和Y控制方式是可以指定或不指定特定设定值。当没有特定值设定要求时，将采用标准设定，并全范围可调。当按特定值设定时，这个特定值将会代表阀的最大设定值。
耐腐蚀螺纹插装阀是设计用在易腐蚀环境中且阀型号带后缀/AP以用来区分。（参考下面选项）。这些阀的阀体是用带钛或铜的不锈钢来制造。内部零件是由与标准阀件相同的碳钢含铅合金制造。更多的细节，请参考结构材料页面。
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。

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.
最大操作压力	5000 psi350 bar
工厂默认的设定值	4 gpm15 L/min.
110 SUS (24 cSt)下的最大泄漏	3 in³/min.@1000 psi50 cc/min.@70 bar
额定响应时间	10 ms10 ms
调节 - 从最小设定到最大设定的顺时针圈数	55
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	.50 lb0,25 kg
Seal kit - Cartridge	Buna: 990203007
Seal kit - Cartridge	EPDM: 990203014
Seal kit - Cartridge	Polyurethane: 990003002
Seal kit - Cartridge	Viton: 990203006

回到首页

Performance Curve for RPGC: 先导式, 平衡滑阀溢流阀

回到首页

Can I use a kick-down relief for my system relief?

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.

Direct acting, pilot operated, what do I use?

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.

SUN压力控制阀在设置压力时的误差是多少？

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。

Where would I use a kick-down relief?

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.

How big is a drop of hydraulic oil?

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

What parts of the Sun cartridge valve are field serviceable?

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.

回到首页