液压装置中容易产生噪声的元件一般认为是泵和阀，阀中又以溢流阀和电磁换向阀等为主。产生噪声的因素很多。溢流阀的噪声有流速声和机械声二种。流速声中主要由油液振动、空穴以及液压冲击等原因产生的噪声。机械声中主要由阀中零件的撞击和磨擦等原因产生的噪声。
台湾WILSHEN伟圣单向减压阀
RCG系列单向减压阀部分型号：
RCG-03-1-31 RCT-03-1-31
RCG-06-1-31 RCT-06-1-31
RCG-10-1-31 RCT-10-1-31
RCG-03-2-31 RCT-03-2-31
RCG-06-2-31 RCT-06-2-31
RCG-10-2-31 RCT-10-2-31
RCG-03-3-31 RCT-03-3-31
RCG-06-3-31 RCT-06-3-31
RCG-10-3-31 RCT-10-3-31
RCG-03-1-30 RCT-03-1-30
RCG-06-1-30 RCT-06-1-30
RCG-10-1-30 RCT-10-1-30
RCG-03-2-30 RCT-03-2-30
RCG-06-2-30 RCT-06-2-30
RCG-10-2-30 RCT-10-2-30
RCG-03-3-30 RCT-03-3-30
RCG-06-3-30 RCT-06-3-30
RCG-10-3-30 RCT-10-3-30 1322
台湾WILSHEN伟圣减压阀
RG系列减压阀部分型号：
RG-03-1-31 RT-03-1-31
RG-06-1-31 RT-06-1-31
RG-10-1-31 RT-10-1-31
RG-03-2-31 RT-03-2-31
RG-06-2-31 RT-06-2-31
RG-10-2-31 RT-10-2-31
RG-03-3-31 RT-03-3-31
RG-06-3-31 RT-06-3-31
RG-10-3-31 RT-10-3-31
RG-03-1-30 RT-03-1-30
RG-06-1-30 RT-06-1-30
RG-10-1-30 RT-10-1-30
RG-03-2-30 RT-03-2-30
RG-06-2-30 RT-06-2-30
RG-10-2-30 RT-10-2-30
RG-03-3-30 RT-03-3-30
RG-06-3-30 RT-06-3-30
RG-10-3-30 RT-10-3-30
台湾WILSHEN伟圣压力控制阀
HC型压力控制阀部分型号：
HCG-03-A-1 HCG-06-A-1 HCG-10-A-1
HCT-03-A-1 HCT-06-A-1 HCT-10-A-1
HCG-03-A-2 HCG-06-A-2 HCG-10-A-2
HCT-03-A-2 HCT-06-A-2 HCT-10-A-2
HCG-03-A-3 HCG-06-A-3 HCG-10-A-3
HCT-03-A-3 HCT-06-A-3 HCT-10-A-3
HCG-03-A-4 HCG-06-A-4 HCG-10-A-4
HCT-03-A-4 HCT-06-A-4 HCT-10-A-4
H型压力控制阀部分型号：
HG-03-A-4 HT-03-A-4
HG-06-A-4 HT-06-A-4
HG-10-A-4 HT-10-A-4
HG-03-A-1 HT-03-A-1
HG-06-A-1 HT-06-A-1
HG-10-A-1 HT-10-A-1
