本标准包括以下安装面:定向控制阀；补偿流量控制阀；止回阀；先导式止回阀；压力控制阀；顺序阀；节流阀；卸荷阀；减压阀。本标准包括以下尺寸标准:最小表面尺寸；安装螺栓的螺纹孔的尺寸和位置；港口的大小和位置；必要时，定位销或固定销的尺寸和位置。本标准规定了以下一般标准:表面光洁度和平整度；相关公差的指示；适当半径的指示。本标准仅适用于按照本标准制造的产品的尺寸标准。 带有该安装表面的底板和歧管块的最大工作压力应由制造商提供。

This standard includes mounting surfaces for the following: directional control valves; compensated flow control valves; check valves; pilot operated check valves; pressure control valves; sequence valves; throttle valves; unloading valves; pressure relief valves. This standard includes the following dimensional criteria: minimum surface dimensions; sizes and locations of tapped holes for mounting bolts; sizes and locations of ports; sizes and locations of dowel or rest pins where required. This standard provides the following general criteria: surface finish and flatness; indication of tolerances where pertinent; indication of appropriate radii. This standard only applies to the dimensional criteria of products manufactured in conformance with this standard. The maximum working pressure for subplates and manifold blocks with this mounting surface shall be supplied by the manufacturer.