外接口控制, 先导式, 减压/溢流阀 带钻入式阀芯阻尼孔
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外接口控制,先导控制式溢流型减压阀将进口高压主油路压力调节减至口1所需的减压压力,同时具备从口1到油箱(口3)的全流量溢流功能。外接口(口4)可以接入其它先导级控制阀或2通阀实现远程控制。
- 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3000 psi(210 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。
- 先导式操作阀在减压与溢流模式间过渡时具有极低的死区。
- 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。
- 通过控制外控口(口4)的压力,阀的有效设定值可以低于公称设定值。
- 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 | 80 gpm320 L/min. |
最大操作压力 | 5000 psi350 bar |
工厂默认的设定值 | blocked control port (dead headed)blocked control port (dead headed) |
控制先导流量 | 15 - 20 in³/min.0,25 - 0,33 L/min. |
调节 - 从最小设定到最大设定的顺时针圈数 | 55 |
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 |
调节螺栓的内六角尺寸 | 5/32 in.4 mm |
锁紧螺母六角尺寸 | 9/16 in.15 mm |
锁紧螺母力矩 | 80 - 90 lbf in.9 - 10 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 |
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.
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。
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.
No. A reducing/relieving valve throttles a supply of oil to maintain a set pressure in a secondary circuit. The valve is open until the secondary or downstream pressure rises to the setting of the valve at which time it starts to close to limit the pressure. If the secondary or downstream pressure is caused to go above the setting, the valve shifts into relieving mode and throttles the secondary circuit back to tank to prevent over-pressure. At no time can the valve connect the supply to tank.
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.
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