WGAM-10/11/210维拓斯VTOZ溢流阀产品质量可靠先导型溢流阀有多种结构。图6.9所示是一种典型的三节同心结构先导型溢流阀，它由先导阀(PilotValve)和主阀(MainValve)两部分组成。该阀原理如图6.10所示。VTOZWGAM型先导式溢流阀WGAM-10/10/100，WGAM-10/10/210，WGAM-10/10/350，WGAM-10/11/100，WGAM-10/11/210，WGAM-10/11/350WGAM-20/10/100WGAM-20/10/210WGAM-20/10/350WGAM-20/11/100WGAM-20/11/210WGAM-20/11/350WGAM-32/10/100WGAM-32/10/210WGAM-32/10/350WGAM-32/11/100WGAM-32/11/210WGAM-32/11/350VTOZWGIR，WGIU型压力控制阀WGIU-10/10/50WGIU-10/10/100WGIU-10/10/210WGIU-10/11/50WGIU-10/11/100WGIU-10/11/210WGIR-10/10/50WGIR-10/10/100WGIRR-10/10/210WGIR-10/11/50WGIR-10/11/100WGIRR-10/11/210VTOZWQV-06型流量控制阀WQV-06/1WQV-06/6/VWQV-06/11WQV-06/16WQV-06/24/VVTOZWDP型单向阀WDR-06/4WDR-10/4WDR-15/4WDR-25/4WDR-06WDR-10WDR-15WDR-25WGAM-10/11/210维拓斯VTOZ溢流阀产品质量可靠VTOZWHMP，WKM型叠加式溢流阀WHMP-011/50WHMP-012/50WHMP-013/50WHMP-014/50WHMP-015/50WHMP-011/100WHMP-012/100WHMP-013/100WHMP-014/100WHMP-015/100WGAM-10/11/210维拓斯VTOZ溢流阀产品质量可靠WHMP-011/210WHMP-012/210WHMP-013/210WHMP-014/210WHMP-015/210WHMP-011/350WHMP-012/350WHMP-013/350WHMP-014/350WHMP-015/350苏州科士华机电设备有限公司WKM-011/50WKM-012/50WKM-013/50WKM-014/50。WKM-015/50WKM-011/100WKM-012/100WKM-013/100WKM-014/100WKM-015/100)