GB/T 46719.4-2025 Active

This document describes the verification method for the crush/rupture pressure rating of aerospace hydraulic filter elements. By injecting contaminants to continuously increase the filter element's differential pressure until crush/rupture occurs or the maximum expected differential pressure is reached without failure, we can determine the filter element's ability to withstand a specified differential pressure under normal flow conditions (specified flow direction). The crush/rupture pressure test can be conducted in conjunction with the filtration efficiency test procedure defined in ISO 14085-3:2015 by continuously injecting contaminants until the specified filter element differential pressure is reached. This document is not applicable to qualification verification of filter elements under specific operating conditions. Qualification verification must be conducted through dedicated test procedures tailored to those conditions, including actual operating media or contaminants. The test data obtained from this document are suitable for evaluating the performance of aerospace hydraulic filter elements.