液压传动.过滤器.压降与流量关系的评估

[中文适用范围]： 本文件规定了一种评估液压过滤器压差与流量特性的程序，并构成了过滤器制造商与用户之间协议的基础。 它还规定了一种方法，用于测量过滤器组件的相关部分（包括旋装过滤器及过滤器内流动通路中的所有阀门）在不同流量和粘度下产生的压差。待测试的典型过滤器类型如下： 类型 1：旋装过滤器，其可更换单元不包含过滤器头（可能包含也可能不包含元件旁通阀）； 类型 2：旋装过滤器，其可更换元件与过滤器头一起测试（可能包含也可能不包含元件旁通阀）； 类型 3：过滤器组件，通常为更换元件类型，即外壳（头和碗）和元件。 [外文原描述]： ISO 3668:2017 specifies a procedure for evaluating differential pressure versus flow characteristics of hydraulic filters and constitutes a basis for agreement between the filter manufacturer and user. It also specifies a method for measurement of the differential pressure generated at different flow rates and viscosities by the relevant parts of a filter assembly, spin-on and any valves contained within the filter which are in the flow stream. The typical types of filter to be tested are as follows: Type 1: which are spin-on filters in which the replaceable unit does not include a filter head (it might or might not include the element by-pass valve); Type 2: which are spin-on filters in which the replaceable element is tested together with a filter head (it might or might not include the element by-pass valve); Type 3: which are filter assembly, usually of the replacement element type, that is the housing (head and bowl) and element.