HGP-22A-F22L HGP-22A-F33L HGP-22A-F44L压力控制阀又分为溢流阀（安全阀）、减压阀、顺序阀、压力继电器等；流量控制阀包括节流阀、调整阀、分流集流阀等；方向控制阀包括单向阀、液控单向阀、梭阀、换向阀等控制元件（即各种液压阀）在液压系统中控制和调节液体的压力、流量和方向
HGP-22A-F55L HGP-22A-F66L HGP-22A-F88L
HGP-22A-F99L HGP-22A-F1111L HGP-22A-F1212L
HGP-22A-L22R HGP-22A-L33R HGP-22A-L44R
HGP-22A-L55R HGP-22A-L66R HGP-22A-L88R
HGP-22A-L99R HGP-22A-L1111R HGP-22A-L1212R
HGP-22A-L22L HGP-22A-L33L HGP-22A-L44L
HGP-22A-L55L HGP-22A-L66L HGP-22A-L88L
HGP-22A-L99L HGP-22A-L1111L HGP-22A-L1212L
HGP-33A-F44R HGP-33A-F66R避免频繁改变液流方向，无法避免时应做好减振措施 HGP-33A-F88R
HGP-33A-F1111R HGP-33A-F1313R HGP-33A-F1414R
HGP-33A-F1717R HGP-33A-F1919R HGP-33A-F2323R
HGP-33A-F2525R HGP-33A-F2828R HGP-33A-F3030R
HGP-33A-F44L HGP-33A-F66L HGP-33A-F88L
HGP-33A-F1111L HGP-33A-F1313L HGP-33A-F1414L
HGP-33A-F1717L HGP-33A-F1919L HGP-33A-F2323L
HGP-33A-F2525L HGP-33A-F2828L HGP-33A-F3030L
HGP-33A-L44R HGP-33A-L66R HGP-33A-L88R 液压油直接泄漏到环境中，除了会影响系统的工作环境外，还会导致系统压力不够引发故障执行元件有液压缸和液压马达 HGP-33A-L1111R HGP-33A-L1313R HGP-33A-L1414R
HGP-33A-L1717R HGP-33A-L1919R HGP-33A-L2323R
HGP-33A-L2525R HGP-33A-L2828R HGP-33A-L3030R
HGP-33A-L44L HGP-33A-L66L HGP-33A-F88R
HGP-2A-F9R
HGP-2A-F11R
HGP-2A-F11R-X-4B
HGP-2A-F12R
HGP-3A-F2R-2B
HGP-3A-F6R-X-2B-10
HGP-3A-F6L-X-2B-10
HGP-3A-F8R
HGP-3A-F8R-X-2B-10
HGP-3A-F11R 辅助元件包括蓄能器、过滤器、冷却器、加热器、油管、管接头、油箱、压力计、流量计、密封装置等,它们起连接、储油、过滤和测量油液压力等辅助作用，可参考《液压传动》《液压系统设计丛书》 HGP-3A-F11R-2B
HGP-3A-F13R
HGP-3A-F14R
HGP-3A-F17R-X-2B-10
HGP-3A-F19R
HGP-3A-F23R-X-2B-10
HGP-3A-F25R
HGP-3A-F25R-X-2B
HGP-3A-F28R-X-2B-10
HGP-3A-F30R-X-2B-10
HGP-3A-F25-R-Y-4BD-10
HGP-33A-L1111L HGP-33A-L1313L HGP-33A-L1414L
HGP-33A-L1717L HGP-33A-L1919L HGP-33A-L2323L
3、泄漏 液压系统的泄漏分为内泄漏和外泄漏温度升高将导致内外泄漏增大，降低其机械效率 HGP-33A-L2525L HGP-33A-L2828L HGP-33A-L3030L PR1-020 PR1-030 PR1-040 PR1-060 PR1-075 PR1-090 PR1-105 PR1-120
PR2-008 PR2-010 PR2-020 PR2-030 PR2-040 PR2-050 PR2-060 PR2-080
YB-E-6 YB-E-8 YB-E-10 YB-E-12 YB-E-16 YB-E-20 YB-E-25 YB-E-32 YB-E-40 YB-E-50 YB-E-63 YB-E-80 YB-E-100 YB-E-125 YB-E-160 YB-E-200由于液压油在管路中的高速流动而产生的冲击以及控制阀打开关闭过程中产生的冲击都是系统发生振动的原因 YB-E-200 YB-E-100 YB-E-80 YB-E-40 PVL12-14-65-F-1R-UU YB1-25 YB1-4 YB1-63 YB1-10 YB1-125 YB1-16
YB1-20 YB1-25 YB1-315 YB1-40 YB1-50 YB1-63 YB1-80 YB1-100 YB1-25 YB1-4 YB1-63 YB1-10 YB1-125 YB1-16 YB1-20 YB1-25 YB1-315 YB1-40 YB1-50执行元件有液压缸和液压马达辅助元件包括蓄能器、过滤器、冷却器、加热器、油管、管接头、油箱、压力计、流量计、密封装置等,它们起连接、储油、过滤和测量油液压力等辅助作用，可参考《液压传动》《液压系统设计丛书》 YB1-63 YB1-80 YB1-100 PVL12-14-65-F-1R-UU YB1-10/10 YB1-10/6 YB1-10/4 YB1-10/25 YB1-6/4 YB1-6/25 YB1-4/4 YB1-4/25 YB1-25/25 YB1-25/10 YB1-25/6 YB1-25/4 YB1-25/25 YB1-20/10 YB1-20/6 YB1-20/4 YB1-20/25 YB1-16/10 YB1-16/6 YB1-16/4 YB1-16/25 YB1-12/10 YB1-12/6 YB1-12/4 YB1-12/25 YB1-25/25 YB1-25/20 YB1-25/16 YB1-25/12 YB1-20/20 YB1-20/16泄漏到环境中的液压油还有发生火灾的危险工作介质是指各类液压传动中的液压油或乳化液，有各种矿物油、乳化液和合成型液压油等几大类 YB1-20/12 YB1-16/16 YB1-12/15 YB1-50/10 YB1-50/6 YB1-50/4 YB1-50/25 YB1-40/10 YB1-40/6 YB1-40/4 YB1-40/25 YB1-32/10 YB1-32/6 YB1-32/4 YB1-50/25 YB1-50/20 YB1-50/16 YB1-50/12 YB1-40/25 YB1-40/20 YB1-40/16 YB1-40/12 YB1-32/25