脚踏配气阀是气压传动系统中常用的元件,其性能优劣直接影响到整个系统。目前,我厂采用的脚踏配气阀是实体滑杆结构(图1),阀杆与阀体需研配,配合间隙为0.005～0.01mm。这种结构加工精度要求高,制造比较困难;装配时需研配,互换性差;磨损后A、B、P孔窜气,造成气阀漏气;阀体与阀杆间容易生锈。为了克服这些缺点,我厂在原阀的基础上,采用滑阀原理,做了 Foot valve with pneumatic transmission system is commonly used components, the merits of its performance directly affect the entire system. At present, the foot valve with our factory is a solid slider structure (Figure 1), stem and body to be research and development, with the gap of 0.005 ~ 0.01mm. This structure requires high precision machining, manufacturing more difficult; R & D assembly, poor interchangeability; wear A, B, P hole blow-gas, resulting in gas valve leakage; body and stem rust easily. In order to overcome these shortcomings, I plant on the basis of the original valve, the use of spool valve principle, made