华德换向阀4WE6J61B/CW220-50NZ5*

华德换向阀4WE6J61B/CW220-50NZ5*

北京华德液压全系列 具体型号

北京华德换向阀部分型号如下：

4WE6G61B/CW220-50N9Z5 4WEH10C20B/6AW220-50NEZ4

4WE6G61B/CW220-50N9Z5L 4WEH10C20B/6AW220-50NEZ5

4WE6G61B/CW220-50NDKL 4WEH10C20B/6AW220-50NEZ5L

4WE6G61B/CW220-50NDL 4WEH10C20B/6AW220-50NTZ4

4WE6G61B/CW220-50NZ5 4WEH10C20B/6AW220-50NTZ5

4WE6G61B/CW220-50NZ5L 4WEH10C20B/6AW220-50NTZ5L

4WE6H50B/AG24N         4WEH10C20B/6AW220-50NZ4

4WE6H50B/AW220-50N 4WEH10C20B/6AW220-50NZ5

4WE6H50B/BG24N         4WEH10C20B/6AW220-50NZ5L

4WE6H50B/BW220-50N 4WEH10C20B/6EW220-50NEZ4

4WE6H61B/CG12N9K4 4WEH10C20B/6EW220-50NEZ5

4WE6H61B/CG12N9Z4 4WEH10C20B/6EW220-50NEZ5L

4WE6H61B/CG12N9Z5 4WEH10C20B/6EW220-50NZ4

4WE6H61B/CG12N9Z5L 4WEH10C20B/6EW220-50NZ5

4WE6H61B/CG12NK4 4WEH10C20B/6EW220-50NZ5L

4WE6H61B/CG12NZ4 4WEH10C20B/O6AG24NETZ4

4WE6H61B/CG12NZ5 4WEH10C20B/O6AG24NETZ5

4WE6H61B/CG12NZ5L 4WEH10C20B/O6AG24NETZ5L

4WE6H61B/CG24N9K4 4WEH10C20B/O6AG24NEZ4

4WE6H61B/CG24N9Z4 4WEH10C20B/O6AG24NEZ5

4WE6H61B/CG24N9Z5 4WEH10C20B/O6AG24NEZ5L

4WE6H61B/CG24N9Z5L 4WEH10C20B/O6AG24NTZ4

4WE6H61B/CG24NK4 4WEH10C20B/O6AG24NTZ5

4WE6H61B/CG24NZ4 4WEH10C20B/O6AG24NTZ5L

4WE6H61B/CG24NZ5 4WEH10C20B/O6AG24NZ4

4WE6H61B/CG24NZ5L 4WEH10C20B/O6AG24NZ5

4WE6H61B/CW220-50N9K4 4WEH10C20B/O6AG24NZ5L

北京华德液压全系列 具体型号

北京华德换向阀部分型号如下：

4WE6H61B/CW220-50N9Z4 4WEH10D20B/6AW220-50NETZ4

4WE6H61B/CW220-50N9Z5 4WEH10D20B/6AW220-50NETZ5

4WE6H61B/CW220-50N9Z5L 4WEH10D20B/6AW220-50NETZ5L

4WE6H61B/CW220-50NK4 4WEH10D20B/6AW220-50NEZ4

4WE6H61B/CW220-50NZ4 4WEH10D20B/6AW220-50NEZ5

4WE6H61B/CW220-50NZ5 4WEH10D20B/6AW220-50NEZ5L

4WE6H61B/CW220-50NZ5L 4WEH10D20B/6AW220-50NTZ4

4WE6J50B/AG24N         4WEH10D20B/6AW220-50NTZ5

4WE6J50B/AW220-50N 4WEH10D20B/6AW220-50NTZ5L

4WE6J50B/BG24N         4WEH10D20B/6AW220-50NZ4

4WE6J50B/BW220-50N 4WEH10D20B/6AW220-50NZ5

4WE6J61B/CG12N9DKL 4WEH10D20B/6AW220-50NZ5L

4WE6J61B/CG12N9DL 4WEH10D20B/6EW220-50NETZ4

4WE6J61B/CG12N9Z4 4WEH10D20B/6EW220-50NETZ5

4WE6J61B/CG12N9Z5 4WEH10D20B/6EW220-50NETZ5L

4WE6J61B/CG12N9Z5L 4WEH10D20B/6EW220-50NEZ4

4WE6J61B/CG12NDKL 4WEH10D20B/6EW220-50NEZ5

4WE6J61B/CG12NDL 4WEH10D20B/6EW220-50NEZ5L

4WE6J61B/CG12NZ4 4WEH10D20B/6EW220-50NTZ4

4WE6J61B/CG12NZ5 4WEH10D20B/6EW220-50NTZ5

4WE6J61B/CG12NZ5L 4WEH10D20B/6EW220-50NTZ5L

4WE6J61B/CG24N9DKL 4WEH10D20B/6EW220-50NZ4

4WE6J61B/CG24N9DL 4WEH10D20B/6EW220-50NZ5

4WE6J61B/CG24N9Z4 4WEH10D20B/6EW220-50NZ5L

4WE6J61B/CG24N9Z5 4WEH10E20B/6AW220-50NETZ4

4WE6J61B/CG24N9Z5L 4WEH10E20B/6AW220-50NETZ5

4WE6J61B/CG24NDKL 4WEH10E20B/6AW220-50NETZ5L

在调节节流部分时，出油腔流量不发生变化，其主要原因是阀芯径向卡住和节流部分发生故障等。减压阀芯或节流阀芯在全关闭位置时，径向卡住，会使调节节流口开度而出油腔的流量不发生变化。当节流调节部分发生故障时，会使调节螺杆不能轴向移动，使出油腔流量也不发生变化。发生阀芯卡住或节流调节部分故障时，应进行清洗和修复。

节流调节型调速阀当节流口调整好锁紧后，有时会出现流量不稳定现象，特别在小稳定流量时易发生，其主要原因是锁紧装置松动，节流口部分堵塞，油温升高，进、出油腔小压差过低和进、出油腔接反等。

1、要保证调速阀对流量（即对执行元件油缸的速度）的控制精度，需要保证一定的压差（进出油腔小压差，指节流口全开，通过公称流量时，阀进出油腔的压差）；普通调速阀，其压差不应小于0. 5MPa。高精度调速阀，其压差高达1MPa。另外，环境温度变化比较大时，就选用带温度补偿的调速阀。注意：压差过低，减压阀部分不能正常工作，就不能对节流阀进行有效的压力补偿，因而影响 液压站液压系统流量的稳定。

通过阀的实际流量确定小了，将导致阀的规格（容量）选得偏小、使阀的局部压力损失过大，引起油温过高等弊端，严重时会造成液压站液压系统不能正常工作。要以通过阀的实际流量（不是按泵的流量），作为选择阀的主要参数之一。

3、控制阀的使用压力、流量，不要超过其额定值，如流量控制阀的使用压力、流量超过了其额定值，就易引起液压卡紧和液动力，对控制阀工作品质产生不良影响。

4、注意普通调速阀启动时存在着流量跳跃现象，这种流量跳跃现象会影响执行元件油缸速度的平稳性。为此，应采取相应的措施。