ISO 16860:2005 pdf download.Hydraulic fluid power —Filters -Test method for differential pressure devices.
The fixture shal have a proof pressure at least 50 % higher than that of the item under test It is recommended that the fixture be pressure tested to the proof pressure at least once per year. if It Es used frequently.
5 Test conditions
Unless specific test requirements dictate otherwse. all tests shall be conducted at room temperature.
6 Types of differential pressure devices
The differential pressure device types described in Annex A are those generaly considered to be in use and ii is the intent of this International Standard to provide a means of determining their operating diaractenstics.
For differential pressure device types or charactenstics not covered by this International Standard, the manufacturer shall be consulted In order to determine details of the methods to be used to determine thew operating characteristics.
WARNING — Differential pressure devices used as additions to a filter assembly may be rated for pressures In excess of the filter assembly. Test pressures should not exceed the maximum rated pressur. of the filter assembly used for test.
7 Procedure for testing differential pressure devices and bypass valve condition signalling indicators
7.1 Actuation pressure test — Filter housing method
7.1.1 Perform one of the followIng procedures wtiich best simulates the device application.
a) Remove the filter element from its housing and plug the filter element port (this allows the pressure to build up m the test housing and on the upstream side of the differential pressure device).
b) Remove the filter element and install a flow-restncting orifice in the filter element port in the housing. The orifice should b. sized to prokice a differential pressure of approximately 75 $ of the specified differential pressure device actuation pressure at 50 % of the rated filter flow rate. This veIl produce a differential presse build.up In the test housing between the upstream and downstream sides of the device.
5 Test conditions
Unless specific test requirements dictate otherwse. all tests shall be conducted at room temperature.
6 Types of differential pressure devices
The differential pressure device types described in Annex A are those generaly considered to be in use and ii is the intent of this International Standard to provide a means of determining their operating diaractenstics.
For differential pressure device types or charactenstics not covered by this International Standard, the manufacturer shall be consulted In order to determine details of the methods to be used to determine thew operating characteristics.
WARNING — Differential pressure devices used as additions to a filter assembly may be rated for pressures In excess of the filter assembly. Test pressures should not exceed the maximum rated pressur. of the filter assembly used for test.
7 Procedure for testing differential pressure devices and bypass valve condition signalling indicators
7.1 Actuation pressure test — Filter housing method
7.1.1 Perform one of the followIng procedures wtiich best simulates the device application.
a) Remove the filter element from its housing and plug the filter element port (this allows the pressure to build up m the test housing and on the upstream side of the differential pressure device).
b) Remove the filter element and install a flow-restncting orifice in the filter element port in the housing. The orifice should b. sized to prokice a differential pressure of approximately 75 $ of the specified differential pressure device actuation pressure at 50 % of the rated filter flow rate. This veIl produce a differential presse build.up In the test housing between the upstream and downstream sides of the device.
