直动式, 减压阀

流量: 40 gpm160 L/min. | 插孔: T-17A
PRHR : 直动式, 减压阀
技术特性 [ + ]

直动式减压阀将进口(口2)高压主油路压力调节减至口1所需的减压压力。此类阀的阻尼结构实现对高的减压力的稳定调节。

  • 注意:此阀没有溢流功能。它不能用在闭死应用中。如果油路的减压压力侧有极低的泄漏,压力会显著升高。不同的阀,压力升高会有所不同。
  • 如果节流孔需要更高的压降补偿,此类阀PR*R可以很好地替换常开,限流补偿器LP*C。
  • 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。
  • 所有弹簧范围都用5000 psi (350 bar)进口压力来测试。
  • 适合应用在蓄能器回路中,因为不会出现先导控制流量导致的减压次级回路泄漏。
  • 直动式版本比相应先导式操作类型具有更好的动态响应。
  • 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)。
  • 技术数据中标定的口3泄漏发生在进口压力为2000 psi (140 bar) 且阀设定在中间范围时。此泄漏直接与压降成正比并与油液粘度成反比。
  • 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-17A
系列 3
通流能力 40 gpm160 L/min.
工厂默认的设定值 0.25 gpm0.25 gpm
最大操作压力 5000 psi350 bar
110 SUS (24 cSt)下的最大泄漏 4 in³/min.65 cc/min.
Adjustment - No. of CW Turns from Min. to Max. setting 55
阀头部安装六角尺寸 1 1/4 in.31,8 mm
阀安装扭矩 150 - 160 lbf ft203 - 217 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 1.50 lb0,70 kg
Seal kit - Cartridge Buna: 990017007
Seal kit - Cartridge Polyurethane: 990017002
Seal kit - Cartridge Viton: 990017006
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.
额外来源 [ + ]