DWDF | 插装阀 » Directional » 3-通

此类2位3通电磁阀为直动式，锥阀结构。此阀断电时1口和2口连通，3口封闭，通电时2口和3口连通，1口封闭。所有流道都可双向通流。与FLeX系列线圈配合使用。由于锥阀结构，此阀泄漏极低。

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。
该阀具有手动超越控制选项，详情见“配置”部分。
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。
该类阀的所有配置均配备锌-镍镀层，能够提供1000小时盐雾保护。
线圈插头提供最高IP69K防护等级，详细信息见线圈产品页。
该阀可以使用FLeX高功率或者防爆线圈。
此阀适合在口3进行负载锁紧应用。在动力源失效情况下，阀会在弹簧偏置下关闭。
阀表现出极低的泄漏速率；小于10滴/分钟。@5000 psi（0,7 cc/min @ 350 bar）。
带D或L控制的型号，手动重载中的止动机构是用来作临时驱动用途。
详细产品页面在该网页上部可以下载浏览。
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。
不同的线圈接头与电压选项都是可选的，也同时可选带或不带浪涌保护。
线圈的独特电磁设计使电磁阀有更高的效率，单位瓦特产生高的阀芯驱动力，从而使阀有可靠的切换。
线圈可以双向安装到螺线管上。
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-11A
系列	1
通流能力	7.5 gpm30 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	5 lbs/1000 psi @ Port 133 N/100 bar @ Port 1
手动紧急操作动作行程	.10 in.2,5 mm
额定响应时间	50 ms50 ms
切换频率	15,000 max. cycles/hr15,000 max. cycles/hr
衔铁直径	.63 in.16 mm
阀头部安装六角尺寸	7/8 in.22,2 mm
阀安装扭矩	30 - 35 lbf ft41 - 47 Nm
Seal and nut kit - Coil	Viton: 990740006
Seal kit - Cartridge	Buna: 990411007
Seal kit - Cartridge	Viton: 990411006

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Performance Curve for DWDF: 3通, 直动式, 电磁锥阀换向阀 (740系列)

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How big is a drop of hydraulic oil?

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

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.

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.

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.

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