ISO 14085-6-2015 PDF

Full title and description

Aerospace series — Hydraulic filter elements — Test methods — Part 6: Initial cleanliness level. This part of ISO 14085 defines a reference method for determining the level of cleanliness of new hydraulic filter elements for aircraft systems, assessed after production (prior to shipment) or immediately prior to installation, to allow comparison of initial cleanliness between elements and suppliers.

Abstract

ISO 14085-6:2015 specifies a reference test method and reporting conventions for measuring the initial cleanliness level of new aerospace hydraulic filter elements. The procedure is intended to be applied where filter elements are used on systems requiring fluid cleanliness conditions defined in a particular specification; resulting data can be used to compare initial cleanliness between elements.

General information

• Status: Published.
• Publication date: 2015 (Edition 1, published March 2015).
• Publisher: International Organization for Standardization (ISO).
• ICS / categories: Aerospace hydraulic systems / ICS 49.080 (hydraulic systems and components).
• Edition / version: Edition 1 (2015).
• Number of pages: 7 pages (published technical leaflet/standard length as listed by ISO).

Scope

This part of ISO 14085 establishes a laboratory reference method to determine the initial cleanliness level of new hydraulic filter elements intended for aircraft hydraulic systems. It applies to elements that must meet fluid cleanliness requirements defined in a particular equipment or system specification and is intended to provide comparable test data for acceptance, purchasing or quality-control purposes. It is not a service‑qualification test for in‑service performance.

Key topics and requirements

• Definition of a reference sampling and test procedure to quantify particulate contamination present in new filter elements prior to installation.
• Preparation and handling requirements to avoid introduction or loss of contaminants during test setup and extraction.
• Analytical techniques and measurement criteria for reporting particle counts and size distributions (to allow comparison between suppliers).
• Reporting format and information required to interpret cleanliness results (sample identification, conditioning, test fluid and instrumentation).
• Use of test results for comparative assessment rather than as a sole qualification for in-service performance.

Typical use and users

Typical users include aerospace hydraulic filter manufacturers and their quality laboratories, aircraft OEMs and system integrators, independent test laboratories, procurement and quality assurance teams specifying acceptance criteria, and maintenance organisations assessing new replacement elements prior to installation. The standard is used for supplier acceptance testing, incoming inspection, and comparative cleanliness verification during product development or change control.

Related standards

ISO 14085-6 is one part of the ISO 14085 series of test methods for aerospace hydraulic filter elements. Related parts include ISO 14085-1 (Test sequence), ISO 14085-2 (Conditioning), ISO 14085-3 (Filtration efficiency and retention capacity — note: the 2015 version was subsequently updated and the part has a newer edition), ISO 14085-4 (Verification of collapse/burst pressure rating) and ISO 14085-5 (Resistance to flow fatigue). These parts define complementary test procedures and together form the test-method suite for comparative evaluation of aerospace hydraulic filter elements.

Keywords

hydraulic filter, aerospace, filter element, initial cleanliness, test method, ISO 14085, particulate contamination, incoming inspection, hydraulic system cleanliness

FAQ

Q: What is this standard?

A: ISO 14085-6:2015 is an ISO international standard (part 6 of the ISO 14085 series) that specifies a reference method for determining the initial cleanliness level of new hydraulic filter elements used in aircraft hydraulic systems.

Q: What does it cover?

A: It covers procedures for extracting and measuring particulate contamination present in new filter elements after production and prior to shipment or installation, plus reporting conventions so results can be compared between elements and suppliers. It is intended for comparative and acceptance testing, not to replace service‑qualification tests.

Q: Who typically uses it?

A: Filter manufacturers, aerospace OEMs, independent test laboratories, procurement and quality assurance teams, and maintenance organisations use the standard for incoming inspection, supplier comparison and product quality control.

Q: Is it current or superseded?

A: ISO 14085-6:2015 is published (Edition 1, 2015). At the time of publication it is the active part for initial cleanliness; users should check ISO maintenance notices for any later amendments or revisions before relying on it for normative requirements.

Q: Is it part of a series?

A: Yes — it is Part 6 of the ISO 14085 series (Aerospace series — Hydraulic filter elements — Test methods). Other parts in the series handle test sequence, conditioning, filtration efficiency, collapse/burst verification and flow‑fatigue resistance.

Q: What are the key keywords?

A: hydraulic filter, initial cleanliness, contamination control, aerospace, filter element testing, particulate measurement, ISO 14085.