Pilot-operated, 减压 阀

流量: 10 gpm40 L/min. | 插孔: T-11A
PBDB : Pilot-operated, 减压 阀
技术特性 [ + ]

先导控制式,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,这样可以利用单一泵源实现多种压力需求的油路。

  • 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。
  • W和Y控制方式(可用时)可以指定或不指定特殊设定值。当没有特殊设定值指定时,W和Y控制方式下可以在全量程范围内调节设定值。当指定为特殊设定值时,此值则代表阀的最大设定值。
  • 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。
  • 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。
  • 如果先导流量消耗很关键,可以考虑使用直动式减压/溢流阀。
  • 主级的阻尼孔被150微米的不锈钢滤网保护。
  • 推荐的最大进口压力由调节范围决定。范围D, E, N和Q 是由进口和减压口间最大压力降2000 psi (140 bar)来测试。范围A, B和H是由进口和减压口间最大压力降3000 psi (210 bar)来测试。范围C和W是由进口最大压力5000 psi (350 bar)来测试。
  • 先导式操作阀具有非常平坦的压力/流量特性,良好的稳定性和极低的滞回。
  • 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5000 psi(350 bar)。
  • 先导式操作减压,减压/溢流阀先天不是快速动作阀。如需极好的动态响应,可以考虑使用直动式阀。
  • 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。
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 10 gpm40 L/min.
工厂默认的设定值 blocked control port (dead headed)blocked control port (dead headed)
最大操作压力 5000 psi350 bar
控制先导流量 7 - 10 in³/min.0,11 - 0,16 L/min.
Adjustment - No. of CW Turns from Min. to Max. setting 55
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
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 .30 lb0,15 kg
Seal kit - Cartridge Buna: 990011007
Seal kit - Cartridge EPDM: 990011014
Seal kit - Cartridge Polyurethane: 990011002
Seal kit - Cartridge Viton: 990011006
性能曲线 [ + ]
常见问题 [ + ]

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.

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。

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

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.
备注 [ + ]
  • 不同弹簧对应的最大工作压差: A和B为3000 psi (210 bar),N和Q为2000 psi (140 bar),W为5000 psi (350 bar)进口压力。
  • 对于采用O控制(旋钮调节,带面板锁)的系列1插装阀,面板上需要留一个直径0.75 in. (19 mm)的孔。
额外来源 [ + ]