ISO 7790:2013规定了安装表面上尺寸为02、03、05、07、08和10的四端口模块化排气阀和四端口定向控制阀的夹紧尺寸。尺寸和尺寸符合ISO 4401，以确保这些阀门的互换性，并减少使用的固定装置数量。 它适用于代表当前实践的四端口模块化堆叠阀和四端口方向控制阀的夹紧尺寸。它们通常适用于工业设备。

ISO 7790:2013 specifies clamping dimensions of four-port modular stack valves and four-port directional control valves, sizes 02, 03, 05, 07, 08, and 10, on mounting surfaces. The dimensions and sizes conform to ISO 4401 so as to ensure interchangeability of these valves and to reduce the number of fixing devices to be used. It applies to clamping dimensions of four-port modular stack valves and four-port directional control valves which represent current practice. They are generally applicable to industrial equipment.