外接口控制, 先导式, 平衡滑阀 溢流主级 带集成T-8A控制插孔 和 口4外泄
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此类阀为带集成先导级控制插孔的常闭调节元件。它带外接口控制和外泄口并为平衡滑阀结构设计。先导级控制插孔可接受任何T-8A插孔的压力控制插装阀。当进口(口1)压力达到先导级控制阀的设定,阀开始向油箱(口2)溢流,节流以调节压力。先导级控制阀的设定决定了进口(口1)与外泄口(口4)之间的压力降。此类阀在主级活塞和先导级控制阀之间提供了一个外接口(口3),可以接入其它先导级控制阀或2通阀实现远程控制。
- 可在口2接受最大压力;适合应用在交叉端口的溢流油路中。
- 主级的阻尼孔被150微米的不锈钢滤网保护。
- 因为滑阀的泄漏,不适合使用在负载锁紧应用中。
- 口4处的压力直接以1:1的比例增加到阀的设定值上,口4处的压力不能超出5000 psi(350 bar)。
- 注意:带-8控制选项,应首先用正确的扭矩安装主级阀。然后用合适的扭矩将T-8A先导级控制阀安装进主级阀中。
- -8控制类型允许通过T-8A插孔将先导级控制阀直接旋进溢流阀的顶部。这些先导级控制阀需单独采购并包括电比例,电磁,气控先导,液控先导操作。请参照先导级控制阀。
- 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。
插孔 | T-24A |
系列 | 4 |
通流能力 | 120 gpm480 L/min. |
最大操作压力 | 5000 psi350 bar |
先导控制孔型 | T-8AT-8A |
先导控制阀安装扭矩 | 20 - 25 lbf ft27 - 33 Nm |
先导控制阀安装尺寸 | 7/8 in.22,2 mm |
在110 SUS(24 cSt)粘度下,主级泄漏 | 5 in³/min.@1000 psi80 cc/min.@70 bar |
额定响应时间 | 10 ms10 ms |
阀头部安装六角尺寸 | 1 5/8 in.41,3 mm |
阀安装扭矩 | 350 - 375 lbf ft474 - 508 Nm |
型号重量 | 3.10 lb1,40 kg |
Seal kit - Cartridge | Buna: 990024007 |
Seal kit - Cartridge | Polyurethane: 990024002 |
Seal kit - Cartridge | Viton: 990024006 |
Maybe not. We build in a good amount of overlap in the kick-down reliefs to prevent false tripping. This means they are not as fast as our standard pilot operated reliefs. A direct-acting relief valve set just above the kick-down relief valve would be good insurance.
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.
The kick-down relief acts much like a circuit breaker. When the pressure at the inlet (port 1) of the relief valve rises to the setting, the valve pops open and drops the pressure down to 100 psi or so. The valve stays open until flow through it stops. Shutting off the supply of oil will reset the valve; reversing pressure on the valve is a positive way of resetting it.
One graphic example is on a portable grain auger for silos. When the farmer gets caught in the auger the kick-down relief trips and allows him to escape.
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.
- 组合插装阀(先导级和主级)集成块的信息仅供参考。插装阀必须单独订购并在使用时进行装配。
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