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北京华德溢流阀DBW10B-2-50B/506BG24NZ5L
面议华德直动式溢流阀DBDH15G10B/400登正代理
面议华德溢流阀DB3U30N-1-30B/100YW220-50NZ4
面议华德溢流阀DB3U10N-1-30B/100YW220-50NZ4
面议华德溢流阀DB3U20H-3-30B/315XW220-50NZ5
面议华德溢流阀DB3U10E-1-30B/315W220-50NZ5L
面议北京华德先导式溢流阀DB30B-1-30B/315XY
面议北京华德DB20A-3-30B/50Y先导式溢流阀
面议北京华德先导式溢流阀DB10A-1-30B/100
面议华德调速阀4WE10J31B/OFCG24NZ5*代理
面议现货代理北京华德调速阀2FRM6A36-20B/6QM
面议现货北京华德调速阀2FMRM6A36-20B/25QR
面议华德换向阀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。