北京华德先导式减压阀DR10DP7-40B/150YM

北京华德液压全系列 具体型号及报价请联系客服

北京华德换向阀部分型号如下：

4WEH10Z20B/6EG24NZ5L 4WEH10Y20B/6EW220-50NEZ5

4WEH10Z20B/O6AG24NETZ4 4WEH10Y20B/6EW220-50NEZ5L

4WEH10Z20B/O6AG24NETZ5 4WEH10Y20B/6EW220-50NTZ4

4WEH10Z20B/O6AG24NETZ5L 4WEH10Y20B/6EW220-50NTZ5

4WEH10Z20B/O6AG24NEZ4 4WEH10Y20B/6EW220-50NTZ5L

4WEH10Z20B/O6AG24NEZ5 4WEH10Y20B/6EW220-50NZ4

4WEH10Z20B/O6AG24NEZ5L 4WEH10Y20B/6EW220-50NZ5

4WEH10Z20B/O6AG24NTZ4 4WEH10Y20B/6EW220-50NZ5L

4WEH10Z20B/O6AG24NTZ5 4WEH10Z20B/6AG24NETZ4

4WEH10Z20B/O6AG24NTZ5L 4WEH10Z20B/6AG24NETZ5

4WEH10Z20B/O6AG24NZ4 4WEH10Z20B/6AG24NETZ5L

4WEH10Z20B/O6AG24NZ5 4WEH10Z20B/6AG24NEZ4

4WEH10Z20B/O6AG24NZ5L 4WEH10Z20B/6AG24NEZ5

4WEH16A50B/6CW220-N9ET25L 4WEH10Z20B/6AG24NEZ5L

4WEH16A50B/6EG24NE25L 4WEH10Z20B/6AG24NTZ4

4WEH16B50B/6CW220-N9ET25L 4WEH10Z20B/6AG24NTZ5

4WEH16C50B/6AG24NETZ4 4WEH16E50B/6EG24NETZ5L

4WEH16C50B/6AG24NETZ5 4WEH16E50B/6EG24NEZ4

4WEH16C50B/6AG24NETZ5L 4WEH16E50B/6EG24NEZ5

4WEH16C50B/6AG24NEZ4 4WEH16E50B/6EG24NEZ5L

4WEH16C50B/6AG24NEZ5 4WEH16E50B/6EG24NTZ4

4WEH16C50B/6AG24NEZ5L 4WEH16E50B/6EG24NTZ5

4WEH16C50B/6AG24NTZ4 4WEH16E50B/6EG24NTZ5L

4WEH16C50B/6AG24NTZ5 4WEH16E50B/6EG24NZ4

4WEH16C50B/6AG24NTZ5L 4WEH16E50B/6EG24NZ5

4WEH16C50B/6AG24NZ4 4WEH16E50B/6EG24NZ5L

4WEH16C50B/6AG24NZ5 4WEH16E50B/6EW220-50NETZ4

4WEH16C50B/6AG24NZ5L 4WEH16E50B/6EW220-50NETZ5

北京华德液压全系列 具体型号及报价请联系客服

北京华德换向阀部分型号如下：

4WEH16C50B/6AW220-50NETZ4 4WEH16E50B/6EW220-50NETZ5L

4WEH16C50B/6AW220-50NETZ5 4WEH16E50B/6EW220-50NEZ4

4WEH16C50B/6AW220-50NETZ5L 4WEH16E50B/6EW220-50NEZ5

4WEH16C50B/6AW220-50NEZ4 4WEH16E50B/6EW220-50NEZ5L

4WEH16C50B/6AW220-50NEZ5 4WEH16E50B/6EW220-50NTZ4

4WEH16C50B/6AW220-50NEZ5L 4WEH16E50B/6EW220-50NTZ5

4WEH16C50B/6AW220-50NTZ4 4WEH16E50B/6EW220-50NTZ5L

4WEH16C50B/6AW220-50NTZ5 4WEH16E50B/6EW220-50NZ4

4WEH16C50B/6AW220-50NTZ5L 4WEH16E50B/6EW220-50NZ5

4WEH16C50B/6AW220-50NZ4         4WEH16E50B/6EW220-50NZ5L

4WEH16C50B/6AW220-50NZ5         4WEH16F50B/6CW220-N9ET25L

4WEH16C50B/6AW220-50NZ5L 4WEH16F50B/6EG24NE25L

4WEH16C50B/6CW220-N9ET25L 4WEH16G50B/6CW220-N9ET25L

4WEH16C50B/6EG24NE25L         4WEH16G50B/6EG24NE25L

4WEH16C50B/6EG24NETZ4         4WEH16H50B/6CW220-N9ET25L

4WEH16C50B/6EG24NETZ5         4WEH16H50B/6EG24NE25L

4WEH16C50B/6EG24NETZ5L         4WEH16J50B/6CW220-N9ET25L

4WEH16C50B/6EG24NEZ4         4WEH16J50B/6EG24NE25L

4WEH16C50B/6EG24NEZ5         4WEH16J50B/6EG24NETZ4

4WEH16C50B/6EG24NEZ5L         4WEH16J50B/6EG24NETZ5

4WEH16C50B/6EG24NTZ4         4WEH16J50B/6EG24NETZ5L

4WEH16C50B/6EG24NTZ5         4WEH16J50B/6EG24NEZ4

4WEH16C50B/6EG24NTZ5L         4WEH16J50B/6EG24NEZ5

4WEH16C50B/6EG24NZ4         4WEH16J50B/6EG24NEZ5L

4WEH16C50B/6EG24NZ5         4WEH16J50B/6EG24NTZ4

4WEH16C50B/6EG24NZ5L         4WEH16J50B/6EG24NTZ5

北京华德液压全系列 具体型号及报价请联系客服

北京华德换向阀部分型号如下：

4WEH16D50B/6CW220-N9ET25L 4WEH16J50B/6EG24NTZ5L

4WEH16D50B/6EG24NE25L         4WEH16J50B/6EG24NZ4

4WEH16E50B/6CW220-N9ET25L 4WEH16J50B/6EG24NZ5

4WEH16E50B/6EG24NETZ5         4WEH16J50B/6EW220-50NETZ5

4WEH16E50B/6EG24NETZ5L         4WEH16J50B/6EW220-50NETZ5L

4WEH16E50B/6EG24NEZ4         4WEH16J50B/6EW220-50NEZ4

4WEH16E50B/6EG24NEZ5         4WEH16J50B/6EW220-50NEZ5

4WEH16E50B/6EG24NEZ5L         4WEH16J50B/6EW220-50NEZ5L

4WEH16E50B/6EG24NTZ4         4WEH16J50B/6EW220-50NTZ4

4WEH16E50B/6EG24NTZ5         4WEH16J50B/6EW220-50NTZ5

4WEH16E50B/6EG24NTZ5L         4WEH16J50B/6EW220-50NTZ5L

4WEH16E50B/6EG24NZ4         4WEH16J50B/6EW220-50NZ4

4WEH16E50B/6EG24NZ5         4WEH16J50B/6EW220-50NZ5

4WEH16E50B/6EG24NZ5L         4WEH16J50B/6EW220-50NZ5L

4WEH16E50B/6EW220-50NETZ4 4WEH16L50B/6CW220-N9ET25L

4WEH16E50B/6EW220-50NETZ5 4WEH16L50B/6EG24NE25L

4WEH16E50B/6EW220-50NETZ5L 4WEH16M50B/6CW220-N9ET25L

4WEH16E50B/6EW220-50NEZ4 4WEH16M50B/6EG24NE25L

4WEH16E50B/6EW220-50NEZ5 4WEH16P50B/6CW220-N9ET25L

4WEH16E50B/6EW220-50NEZ5L 4WEH16P50B/6EG24NE25L

4WEH16E50B/6EW220-50NTZ4 4WEH16T50B/6CW220-N9ET25L

4WEH16E50B/6EW220-50NTZ5 4WEH16T50B/6EG24NE25L

4WEH16E50B/6EW220-50NTZ5L 4WEH16U50B/6CW220-N9ET25L

北京华德液压全系列 具体型号及报价请联系客服

北京华德换向阀部分型号如下：

4WEH16E50B/6EW220-50NZ4         4WEH16U50B/6EG24NE25L

4WEH16E50B/6EW220-50NZ5         4WEH16Y50B/6CW220-N9ET25L

4WEH16E50B/6EW220-50NZ5L 4WEH16Y50B/6EG24NE25L

4WEH16F50B/6CW220-N9ET25L 4WEH25A50B/6CW220-N9ET25L

4WEH16F50B/6EG24NE25L         4WEH25A50B/6EG24NE25L

4WEH16G50B/6CW220-N9ET25L 4WEH25B50B/6CW220-N9ET25L

4WEH16G50B/6EG24NE25L         4WEH25B50B/6EG24NE25L

4WEH16H50B/6CW220-N9ET25L 4WEH25C50B/6CW220-N9ET25L

4WEH16H50B/6EG24NE25L         4WEH25C50B/6EG24NE25L

4WEH16J50B/6CW220-N9ET25L 4WEH25D50B/6CW220-N9ET25L

4WEH16J50B/6EG24NE25L 4WEH25D50B/6EG24NE25L

4WEH16J50B/6EG24NETZ4 4WEH25E50B/6CW220-N9ET25L

4WEH16J50B/6EG24NETZ5 4WEH25E50B/6EG24NE25L

4WEH16J50B/6EG24NETZ5L 4WEH25E50B/OF6AG24NETZ4

4WEH16J50B/6EG24NEZ4 4WEH25E50B/OF6AG24NETZ5

4WEH16J50B/6EG24NEZ5 4WEH25E50B/OF6AG24NETZ5L

4WEH16J50B/6EG24NEZ5L 4WEH25E50B/OF6AG24NEZ4

4WEH16J50B/6EG24NTZ4 4WEH25E50B/OF6AG24NEZ5

4WEH16J50B/6EG24NTZ5 4WEH25E50B/OF6AG24NEZ5L

4WEH16J50B/6EG24NTZ5L 4WEH25E50B/OF6AG24NTZ4

4WEH16J50B/6EG24NZ4 4WEH25E50B/OF6AG24NTZ5

4WEH16J50B/6EG24NZ5 4WEH25E50B/OF6AG24NTZ5L

4WEH16J50B/6EG24NZ5L 4WEH25E50B/OF6AG24NZ4

北京华德液压全系列 具体型号及报价请联系客服

北京华德换向阀部分型号如下：

4WEH16J50B/6EW220-50NETZ4 4WEH25E50B/OF6AG24NZ5

4WEH16J50B/6EW220-50NETZ5 4WEH25E50B/OF6AG24NZ5L

4WEH16J50B/6EW220-50NETZ5L 4WEH25E50B/OF6AW220-50NETZ4

4WEH16J50B/6EW220-50NEZ4 4WEH25E50B/OF6AW220-50NETZ5

4WEH16J50B/6EW220-50NEZ5 4WEH25E50B/OF6AW220-50NETZ5L

4WEH16J50B/6EW220-50NEZ5L 4WEH25E50B/OF6AW220-50NEZ4

4WEH16J50B/6EW220-50NTZ4 4WEH25E50B/OF6AW220-50NEZ5

4WEH16J50B/6EW220-50NTZ5 4WEH25E50B/OF6AW220-50NEZ5L

4WEH16J50B/6EW220-50NTZ5L 4WEH25E50B/OF6AW220-50NTZ4

4WEH16J50B/6EW220-50NZ4         4WEH25E50B/OF6AW220-50NTZ5

4WEH16J50B/6EW220-50NZ5         4WEH25E50B/OF6AW220-50NTZ5L

4WEH16J50B/6EW220-50NZ5L 4WEH25E50B/OF6AW220-50NZ4

4WEH16L50B/6CW220-N9ET25L 4WEH25E50B/OF6AW220-50NZ5

4WEH16L50B/6EG24NE25L         4WEH25E50B/OF6AW220-50NZ5L

4WEH16M50B/6CW220-N9ET25L 4WEH25F50B/6CW220-N9ET25L

4WEH16M50B/6EG24NE25L         4WEH25F50B/6EG24NE25L

4WEH16P50B/6CW220-N9ET25L 4WEH25G50B/6CW220-N9ET25L

4WEH16P50B/6EG24NE25L         4WEH25G50B/6EG24NE25L

4WEH16T50B/6CW220-N9ET25L 4WEH25H50B/6CW220-N9ET25L

4WEH16T50B/6EG24NE25L         4WEH25H50B/6EG24NE25L

4WEH16U50B/6CW220-N9ET25L 4WEH25J50B/6CW220-N9ET25L

4WEH16U50B/6EG24NE25L         4WEH25J50B/6EG24NE25L

4WEH16Y50B/6CW220-N9ET25L 4WEH25L50B/6CW220-N9ET25L

4WEH16Y50B/6EG24NE25L         4WEH25L50B/6EG24NE25L

4WEH25A50B/6CW220-N9ET25L 4WEH25M50B/6CW220-N9ET25L

4WEH25A50B/6EG24NE25L         4WEH25M50B/6EG24NE25L

4WEH25B50B/6CW220-N9ET25L 4WEH25P50B/6CW220-N9ET25L

4WEH25B50B/6EG24NE25L         4WEH25P50B/6EG24NE25L

4WEH25C50B/6CW220-N9ET25L 4WEH25T50B/6CW220-N9ET25L

4WEH25C50B/6EG24NE25L         4WEH25T50B/6EG24NE25L

4WEH25D50B/6CW220-N9ET25L 4WEH25U50B/6CW220-N9ET25L

4WEH25D50B/6EG24NE25L         4WEH25U50B/6EG24NE25L

4WEH25E50B/6CW220-N9ET25L 4WEH25Y50B/6CW220-N9ET25L

4WEH25E50B/6EG24NE25L         4WEH25Y50B/6EG24NE25L

4WEH25E50B/OF6AG24NETZ4         4WEH32A50B/6CW220-N9ET25L

4WEH25E50B/OF6AG24NETZ5         4WEH32A50B/6EG24NE25L

4WEH25E50B/OF6AG24NETZ5L 4WEH32B50B/6CW220-N9ET25L

4WEH16E50B/6EG24NE25L         4WEH16J50B/6EG24NZ5L

4WEH16E50B/6EG24NETZ4         4WEH16J50B/6EW220-50NETZ4

液压噪声分析：

1．柱塞泵或马达的噪声

(1)吸空现象是造成液压泵噪声过高的主要原因之一。当油液中混入空气后，易在其高压区形成气穴现象，并以压力波的形式传播，造成油液振荡，导致系统产生气蚀噪声。

其主要原因有：

1.液压泵的滤油器、进油管堵塞或油液粘度过高，均可造成泵进油口处真空度过高，使空气渗入。

2.液压泵、先导泵轴端油封损坏，或进油管密封不良，造成空气进入o  

3.油箱油位过低，使液压泵进油管直接吸空。

当液压泵工作中出现较高噪声时，应首先对上述部位进行检查，发现问题及时处理。

(2)液压泵内部元件过度磨损，如柱塞泵的缸体与配流盘、柱塞与柱塞孔等配合件的磨损、拉伤，使液压泵内泄漏严重，当液压泵输出高压、小流量油液时将产生流量脉动，引发较高噪声。此时可适当加大先导系统变量机构的偏角，以改善内泄漏对泵输出流量的影响。

液压泵的伺服阀阀芯、控制流量的活塞也会因局部磨损、拉伤，使活塞在移动过程中脉动，造成液压泵输出流量和压力的波动，从而在泵出口处产生较大振动和噪声。此时可对磨损、拉伤严重的元件进行刷镀研配或更换处理。

(3)液压泵配流盘也是易引发噪声的重要元件之一。配流盘在使用中因表面磨损或油泥沉积在卸荷槽开启处，都会使卸荷槽变短而改变卸荷位置，产生困油现象，继而引发较高噪声。在正常修配过程中，经平磨修复的配流盘也会出现卸荷槽变短的后果，此时如不及时将其适当修长，也将产生较大噪声。在装配过程中，配流盘的大卸荷槽一定要装在泵的高压腔，并且其尖角方向与缸体的旋向须相对，否则也将给系统带来较大噪声。

2．溢流阀的噪声  

溢流阀易产生高频噪声，主要是先导阀性能不稳定所致，即为先导阀前腔压力高频振荡引起空气振动而产生的噪声。

其主要原因有：

(1)油液中混入空气，在先导阀前腔内形成气穴现象而引发高频噪声。此时，应及时排尽空气并防止外界空气重新进入。

(2)针阀在使用过程中因频繁开启而过度磨损，使针阀锥面与阀座不能密合，造成先导流量不稳定、产生压力波动而引发噪声，此时应及时修理或更换。

(3)先导阀因弹簧疲劳变形造成其调压功能不稳定，使得压力波动大而引发噪声，此时应更换弹簧。

3．液压缸的噪声

(1)油液中混有空气或液压缸中空气未完全排尽，在高压作用下产生气穴现象而引发较大噪声。此时，须及时排尽空气。

(2)缸头油封过紧或活塞杆弯曲，在运动过程中也会因别劲而产生噪声。此时，须及时更换油封或校直活塞杆。

4．管路噪声  

管路死弯过多或固定卡子松脱也能产生振动和噪声。因此，在管路布置上应尽量避免死弯，对松脱的卡子须及时拧紧。