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产品特点：
1:内部抵抗、许容背压大幅提高。
2:油浸式电磁设计，作动平稳，噪音小。
3:线圈采一体成型，防潮效果佳，散热好，耐高温。
4:电磁阀安装尺寸均符合国际标准。
5：降低油温提高寿命，节省维护费用----
由于阀体流道采用了特殊结构设计，因而内部阻抗小，使用压降减少，液压油的 温度亦可相应降低，是液压油不易变质，液压油寿命延长，减少液压油更换费用。
华德电液换向阀部分型号：
4WEH32D40B/OAG24N9/K4,4WEH32HL40B/OEWW220-50N/K4，
4WEH32C40B/OFAG24N9/SK4，4WEH32M40B/OFEW230N/K4，
4WEH32K40B/OFEW230N9/K4，4WEH32HP40B/OFAG24N/K4,
4WEH32ZJ40B/OEW230N9ET/SK4，4WEH32Q40B/OAW230NE/S2K4,
4WEH32HF40B/OFG24N9T/SK4，4WEH32R40B/OFEW230N/K4，
4WEH32G40B/OAW230N9ET/K4，4WEH32T40B/OAW230N/K4，
4WEH32H40B/OFAWG24N9/K4，4WEH32V40B/OEW230NET/S2K4，
4WEH32J40B/OAW230N9/K4，4WEH32U40B/OFWG24N/SK4，
北京华德电磁阀
RVP6-10B/ RVP10-10B/ RVP16-10B/ Z2S6-40B/ Z2S10-1-20B/ SL10PA1-30B/ SL10PB1-30B/ SV10PA1-30B/ 4WMM6Y50B/ DBDH6P10B/50 DBDS6P10B/50 DBDH6P10B/100 DBDS6P10B/100 DBDH6P10B/200 DBDS6P10B/200 DBDH6P10B/315 DBDS6P10B/315 DBDH10P10B/50 DBDS10P10B/50 DBDH10P10B/100 DBDS10P10B/100 DBDH10P10B/200 DBDS10P10B/200 DBDH10P10B/315 DBDS10P10B/315 DB10-1-50B/50 DB10-2-50B/50 DB10-1-50B/100 DB10-2-50B/100 DB10-1-50B/200 DB10-2-50B/200 DB10-1-50B/350 DB10-2-50B/350 DB20-1-50B/50 DB20-2-50B/50 DB20-1-50B/100 DB20-2-50B/100 DB20-1-50B/200 DB20-2-50B/200 DB20-1-50B/350 DB20-2-50B/350 DB30-1-50B/50 DB30-2-50B/50 DB30-1-50B/100 DB30-2-50B/100 DB30-1-50B/200 DB30-2-50B/200 DB30-1-50B/350 DB30-2-50B/350 Z2FS6-30B/