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导压比 3:1, 带外泄口 平衡阀 - 透大气
Cavity: T-2A | Capacity:
技术规格
带先导协助开启的外接大气型平衡阀是用来控制超驰负载。它允许油液从方向阀（口2）到负载口（口1）单向自由流通，同时直动式，先导协助溢流阀功能可以控制从口1到口2的液流。口3的先导协助以先导比率的作用系数降低了溢流功能的有效设定值。因弹簧腔接大气，口2的背压不会影响阀的设定值。此阀还被称作运动控制阀或者越过中心阀。
- 平衡阀的设定值应该至少为负载压力值的1.3倍。
- 顺时针旋转调节将会减少设定，降低压力。
- 完全释压情况下，设定等于200psi（14bar）。
- 大约每4000次循环会产生1滴（0.07cc）的泄漏从先导区域流量弹簧腔。
- 标准设定下，阀的复位压力值高于阀开启值的85%。当设定值小于标准设定值，复位压力值的百分比将相应变小。
- Sun的平衡阀可以被安装进执行器内部的安装孔，成为执行器的一部分，进而更加安全地保护回路。
- 这种阀在所有的口之间都完全密封。
- 和无外部泄流的相比，为保证机器工作平稳，外部泄流阀可以采用更低先导比保证机器。
- 3口外部泄流阀是一种通大气型的平衡阀，这是针对一些既有问题（误使用了无先导泄油阀）所采用的解决方案。这种阀经长时间使用会产生泄漏，同时弹簧腔也容易受潮。所以，对于新的方案，我们推荐采用四口先导泄油阀。
- 所有的3口平衡阀，负载控制阀，以及先导开启单向阀都结构上可以相互替换。（对同样的规格情况下，他们是相同流量路径相同孔型）
- 抗腐蚀阀是针对腐蚀环境下使用的，其型号通过后缀“/AP”区分（查阅如下可选项）。外部零件是由不锈钢，同时可能的情况下带有钛或者黄铜，内部的零件由碳钢制作，就如同标准阀。如需要知道更详细的信息，请查看结构材料页面。
- 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。
- 插孔T-2A
- 系列2
- 通流能力30 gpm
- 先导比3:1
- 最大设定时最大推荐负载压力3075 psi
- 最大设定4000 psi
- 单向开启压力25 psi
- 回座时最大泄漏5 drops/min.
- 工厂默认的设定值2 in³/min.
- 调节 - 从最小设定到最大设定的逆时针圈数5
- 运行特性标准
- 复位>85% of setting
- 阀头部安装六角尺寸1 1/8 in.
- 阀安装扭矩45 - 50 lbf ft
- 调节螺栓的内六角尺寸5/32 in.
- 锁紧螺母六角尺寸9/16 in.
- 锁紧螺母力矩80 - 90 lbf in.
- 型号重量.60 lb
- Seal kit - Cartridge
- Seal kit - Cartridge
- Seal kit - Cartridge
- Seal kit - Cartridge
Model CAD Files
Symbol CAD Files
Why is turning the adjust screw for counterbalance valves opposite of most other valves?
What parts of the Sun cartridge valve are field serviceable?
You say your valves leak 5 drops/min. How can I keep my load from drifting?
How do I determine the setting of a counterbalance valve?
How do I know how much pilot pressure is required to lower a load with a counterbalance valve?
When should I use a vented counterbalance valve?
How does Sun test a counterbalance valve for leakage?
How do I decide which pilot ratio to select?
How big is a drop of hydraulic oil?
Why can't I use a counterbalance valve in a closed loop transmission circuit?
What do you mean by the setting of a counterbalance valve and what should it be?
I don't need pilot assist. Can I just block port 3?
Can I use an atmospherically vented counterbalance valve instead of the four-port version to save on plumbing?
Why is it that your valves have pilot ratios below 10:1, while other manufacturers start at 7:1 and go up?
Why can't I block the pilot vent port? That area is positively sealed, isn't it?
Should I replace the counterbalance valve if my cylinder is drifting or moving?
I have a pilot-to-open check on a large cylinder and the decompression is violent. Can I use a counterbalance instead?
How do I size a counterbalance valve?
Can I adjust a counterbalance valve in the field?
Why do you offer 2 check valve cracking pressures?
What happens to the counterbalance valve if I have backpressure in my system?
What do you mean by hysteresis when referring to a counterbalance valve?
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