外接口控制 , pilot-operated, 平衡滑阀 溢流 阀 - 在单向阀前

流量: 10 gpm40 L/min. | 插孔: T-21A
HVCA : 外接口控制 , pilot-operated, 平衡滑阀  溢流 阀 - 在单向阀前
技术特性 [ + ]

在单向阀前的外接口控制溢流阀是一种复合型阀,此阀在单向阀功能前并入了一个外接口控制,先导控制式,平衡滑阀结构溢流阀。当进口(口2)压力达到阀设定值,阀开始向油箱(口3)溢流,节流以调节压力。单向阀流量为进 口(口2)到系统口(口1)。此类阀在主级活塞和先导级之间提供了一个外接口(口4),可以接入其它先导级控制阀或2通阀实现远程控制。此类阀压力调节精度高,压力波动随流量变化小,并且调节平稳,噪声小,响应速度适中。

  • 注意!该阀偏离正常的溢流阀流道,不能与Sun现存的溢流阀阀块一起工作。
  • 所有弹簧范围的最小设定为75 psi (5 bar)。
  • 口3(油箱)处的背压直接以1:1的比例增加到阀的设定值上。
  • 此阀的单向阀功能部分最大泄漏速率不超过1滴/分钟(0,07 cc/min)。
  • 此双功能阀一方面可以在单个或多泵油路中提供泵隔离和溢流保护作用。另外此阀可以在蓄能器感应,泵卸荷油路中作为主级阀使用。
  • 口4(外控口)处的远程先导溢流阀可以使阀压力低于设定值。
  • 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。
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 10 gpm40 L/min.
工厂默认的设定值 4 gpm15 L/min.
最大操作压力 5000 psi350 bar
110 SUS (24 cSt)下的最大泄漏 2 in³/min.@1000 psi30 cc/min.@70 bar
单向开启压力 25 psi1,7 bar
额定响应时间 10 ms10 ms
Adjustment - No. of CW Turns from Min. to Max. setting 55
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
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 .35 lb0,15 kg
Seal kit - Cartridge Buna: 990021007
Seal kit - Cartridge Polyurethane: 990021002
Seal kit - Cartridge Viton: 990021006
性能曲线 [ + ]
常见问题 [ + ]

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.

There are exactly 250 Sun drops in a cubic inch or 15 in a cc.

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.

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。

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 [ + ]