电比例 , 直动式, 减压/溢流阀 带开式过渡位 - 无命令时最高压力设定

流量: 5 gpm20 L/min. | 插孔: T-11A
PRDM : 电比例 , 直动式, 减压/溢流阀 带开式过渡位 - 无命令时最高压力设定
技术特性 [ + ]

电比例,直动式溢流型减压阀将进口(口2)高压主油路压力调节减至口1所需的减压压力,同时具备从口1到油箱(口3)的全流量溢流功能。此阀偏置位置为减压模式。口2与口1在客户指定压力设定下接通。增加线圈电流会正比例减小口1减压压力。如果口1压力超出线圈电磁力产生的设定值,口1会向口3溢流。此阀在减压与溢流模式之间的过渡位是打开的。这种过渡位置使阀具备良好的压力控制与动态响应性能。

  • 口3处的压力直接以1:1的比例增加到阀的设定值上,且压力不能超出3000 psi(210 bar)。
  • 口3处最大压力不能超过3000 psi (210 bar)。
  • 直动式作用的概念在受污染系统中可提供更高的可靠性操作,特别是在闭死情况下。
  • 从减压压力口(口1)到进口(口2)的反向液流可能导致主阀芯关闭。如果油路中需要反向自由流,可以考虑在油路中加入单向阀。
  • 减压到溢流为微开的过渡位,因此此阀具有良好的压力控制性能,油液的消耗速率为0.1 gpm(0,4 L/分钟。)。
  • 为了达到最佳性能,需要使用带电流传感和可调震颤的放大器。震颤需在100-250 HZ间可调。
  • 线圈可与Sun的其它电磁阀线圈互换,并且线圈可反向安装在套筒上。
  • 没有电信号,减压压力设置为用户指定的缺省值。当增加输入到线圈的电信号命令时,会比例减少二次压力值。
  • 所有3口减压阀和减压/溢流阀在尺寸上可互换(如:给定的外形结构尺寸阀拥有相同的流道,相同的插孔)。考虑安装配置时,减压/溢流阀的回油路(口3)最好具有公称流量能力。
  • 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。
比例性能数据 [ + ]
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。
滞环(在颤振作用下) 6%6%
直流驱动下滞环 <8%<8%
线性度(在颤振作用下) <2%<2%
Repeatability (with dither) <2%<2%
推荐颤振频率 140 Hz140 Hz
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-11A
系列 1
通流能力 5 gpm20 L/min.
最大操作压力 5000 psi350 bar
110 SUS (24 cSt)下的最大泄漏 20 in³/min.330 cc/min.
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 30 - 35 lbf ft41 - 47 Nm
型号重量(带线圈) 1.20 lb0,55 kg
Seal and nut kit - Coil Viton: 990770006
Seal kit - Cartridge Buna: 990511007
Seal kit - Cartridge Viton: 990511006
性能曲线 [ + ]
常见问题 [ + ]

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。

Yes. If you look in the sandwich section you will see that we offer many such packages. When you are pressurizing B, A is connected to tank, allowing the reducer to do its job. When you reverse, the drain or tank port of the reducer is pressurized by A. This increases the setting of the reducer and helps keep the reducer open in the reverse flow direction.

Our reducing valves are outside-in valves; the supply pressure on the outside of the working parts is higher than the inside. At some pressure differential, the outside (sleeve) will close in on the piston and cause the valve to stick. A D range is adjustable from 25 to 800 psi with a maximum differential of 2000 psi. This means you could set the valve at 600 psi and expect it to work correctly with a supply pressure of 2600 psi. The valve may work at higher differentials, but we do not recommend it. The W and C ranges are tested over their entire range with an inlet pressure of 5000 psi. All direct-acting valves are tested with an inlet pressure of 5000 psi.

No. A reducing/relieving valve throttles a supply of oil to maintain a set pressure in a secondary circuit. The valve is open until the secondary or downstream pressure rises to the setting of the valve at which time it starts to close to limit the pressure. If the secondary or downstream pressure is caused to go above the setting, the valve shifts into relieving mode and throttles the secondary circuit back to tank to prevent over-pressure. At no time can the valve connect the supply to tank.

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

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.

Yes. A reducing or reducing/relieving valve is normally open. If the pressure in the secondary circuit is less than the setting, it will be open.

2 caveats: (1) If the valve is in the reducing mode and you suddenly reverse the flow, the valve will not have time to open and will shift into relieving mode or (2) If the back flow generates a pressure drop through the valve that exceeds the setting, the valve will shift into the relieving mode.

When in doubt, use a reverse flow check.

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 [ + ]
Coil Information [ + ]

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