Hydraulic fluid power—Pressure-reducing valves, sequence valves, unloading valves, throttle valves and check valves—Mounting surfaces
MOD ISO 5781:2000
全国液压气动标准化技术委员会(SAC/TC 3)
本标准规定了主油口最大直径为4 mm~32 mm的液压减压阀、顺序阀、卸荷阀、节流阀和单向阀安装面的尺寸及其相关特性，以保证其使用的互换性。
本标准适用于通用的板式联接液压减压阀、顺序阀、卸荷阀、节流阀和单向阀的安装面，这类阀通常用于工业设备。
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