3通, 直动式, 固定设定, 方向阀 带口4外泄 (口3到口4打开,口2关闭)

流量: 7 gpm28 L/min. | 插孔: T-21A
DRBRX : 3通, 直动式, 固定设定, 方向阀 带口4外泄 (口3到口4打开,口2关闭)
技术特性 [ + ]

直动式,3通换向阀(口3到口4打开,口2关闭)为切换装置,常用在中等流量油路中。它们可以单独使用或者用来驱动更大流量的先导控制换向阀或者逻辑阀。当口1与口4之间的压差超出设定时,此阀将切换。

  • 2口和3口之间的流道是双向的。
  • 由于采用了直动式的设计,这些阀具备了低内部泄漏以及低先导流量损失的特性。
  • 4口的压力直接作用在阀的设定值上。
  • 这个阀并不是双稳态的;其在所示的两个位置之间是可以调节的。
  • 3口的最大压力需要限制在3000psi(210bar)。这是基于疲劳强度的要求而非工作运行的要求。
  • Sun浮动式的结构可以最大限度地减少由于过大的安装扭矩以及孔型加工的误差所造成的干涉现象。
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-21A
系列 1
通流能力 7 gpm28 L/min.
最大操作压力 5000 psi350 bar
110 SUS (24 cSt)下的最大泄漏 2 in³/min.30 cc/min.
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 kit - Cartridge Buna: 990021007
Seal kit - Cartridge Polyurethane: 990021002
Seal kit - Cartridge Viton: 990021006
性能曲线 [ + ]
常见问题 [ + ]

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.

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.

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.

DP**s and DR**s are from the reducer/reliever family and are very capable of modulating. They are not bistable.

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.

额外来源 [ + ]