DBALS | 插装阀 » Directional » 3-通

此类2位3通电磁阀为直动式，平衡滑阀结构先导级阀且常用来作其他大流量阀的先导级。此类阀具有软启动特性。软启动特性显著得降低阀驱动时的系统冲击。此类阀为口1和口2常开或口1和口3常开且所有流通的油路为双向。

软切换阀与标准阀可替换，但是流通能力降低。
软切换特性可极大地减少阀驱动时候带来的冲击，但是不宜用在计时很关键的应用中。如果需要精确的斜坡上升或计时控制，请考虑使用Sun的电比例阀。
此软切换特性将比Sun的标准电磁阀显著增加响应时间。响应时间取决于流量，压力，线圈电压，油液粘度和周围的温度。典型响应时间范围为150ms到300ms。
为了获得一致的软切换特性，口1应该有正压力。
此阀带有推式手动重载选项。其它手动控制选项例如T或D，不能和软切换控制一起订购，但是在现场可被很容易地安装。见上面旋转/锁紧手动重载链接以获得详细介绍。请注意：风雨线圈不兼容手动重载功能。
电磁铁组件的疲劳耐压等级为5000 psi (350 bar)。
此阀可被直接驱动且不需要最小液压操作压力。
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。
此阀采用湿式衔铁线圈设计。这意味着衔铁周围的工作流体介质将曝露在线圈所产生热场中。如果线圈长时间通电，这将是一个影响因素。一些液体，特别是水/乙二醇混合物，会在长时间高温下分解并形成凡立水，而这将会影响阀的功能。
线圈可以和Sun的系列1电磁阀产品互换并可从另外一个方向上安装在套筒上。
线圈接头等级可提供至IP69K。请见单个线圈产品的详细产品说明。额外的风雨线圈和工具包可提供更完善的环境防护。
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-9A
系列	P
通流能力	.25 gpm1 L/min.
最大操作压力	5000 psi350 bar
110 SUS (24 cSt)下的最大泄漏	10 drops/min.@5000 psi0,7 cc/min.@350 bar
手动紧急操作需要的力	10 lbs/1000 psi @ Port 166 N/100 bar @ Port 1
手动紧急操作动作行程	.10 in.2,5 mm
衔铁直径	.75 in.19 mm
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
Seal kit - Cartridge	Buna: 990009007
Seal kit - Cartridge	EPDM: 990309014
Seal kit - Cartridge	Polyurethane: 990009002
Seal kit - Cartridge	Viton: 990009006

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Performance Curve for DBALS: 3通, 软切换, 电磁滑阀换向阀 - 先导流量

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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.

How big is a drop of hydraulic oil?

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

Where would I use a DR__ instead of a DP__?

In many circuits the directional cartridge is set to shift at a low pressure no matter how high the pilot pressure goes. If you use a DP__ , the pilot flow increases to significant amounts. A DR__ however will only consume a small amount of flow. A DP__ is useful when you want to block or open the pilot flow to shift the valve.

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.

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