柱塞向上供油，当上行到柱塞上的斜槽（停供边）与套筒上的回油孔相通时，泵 油室低压油路便与柱塞头部的中孔和径向孔及斜槽沟通，油压骤然下降，出油阀在弹 簧力的作用下迅速关闭，
PBDB-LWN
FDBA-LAN
RPGC-LQV
ATOS阿托斯工程机械液压
ATOS阿托斯变速箱操纵阀
ATOS阿托斯伺服阀
ATOS阿托斯液控单向阀;CKGB-XCN
CKIB-XCN
CVEV-XCN
CXAD-XAN
CXBA-XAN
CXBA-XBN CXDA-XAN
CXFA-XAN
CXFA-XCN CXJA-XCN
FCCB-XAN
FCDB-XAN FDBA-LAN
LRHC-XHN
NCFC-HAN NCGB-LCN
NFCC-LCN
PBHB-LAN PPDB-LAN
RDDA-LAN
RPCC-LANRPCC-LWN
RPEC-FAN
RPEC-LANRPEC-LNN
CPOM3AAV
RPEC-LQN CPOM3DDV
RPEC-LWN
CPOM4DDHTV
RPGC-CWN
CPOM6DDV
RPGC-LAN
RVCA-LAN SCEA-LA
ATOS阿托斯转向控制阀
ATOS阿托斯常规阀Conventional Valves：
ATOS阿托斯管式直动式溢流阀ARE,
ATOS阿托斯管式先导式溢流阀ARAM,
ATOS阿托斯板式先导溢流阀AGAM,
ATOS阿托斯直动式顺序阀AGIP,
ATOS阿托斯先导减压阀AGIR,
ATOS阿托斯先导顺序阀AGIS,
ATOS阿托斯先导卸压阀AGIU,
ATOS阿托斯法兰安装先导溢流阀REM,
ATOS阿托斯螺纹插装直动式溢流阀SP-CART,
ATOS阿托斯流量控制阀QV-06,QV-10,QV-20,AQFR,
ATOS阿托斯单向阀DB,DR,ADR,ADRL,AGRL,ARRLE
ATOS阿托斯叠加阀Modular valves：
ATOS阿托斯流量控制阀DHQ,DKQ,
ATOS阿托斯压力控制阀HMP,HM,KM,HS,KS,HG,KG,
ATOS阿托斯单向阀HR,KR,JPR-2,JPR-3
ATOS阿托斯换向阀
ATOS阿托斯板式电磁换向阀DHI,DHU,DHO,DKE，
