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  • BSI
    BS ISO 27895:2009 Vacuum technology. Valves. Leak test
    Edition: 2010
    $313.97
    / user per year

Description of BS ISO 27895:2009 2010

This International Standard specifies methods for the leak testing of vacuum valves used for control of gas flow or vacuum pressure in a vacuum system. It is applicable to vacuum valves that can be closed to leak rates less than 1 × 10−5 Pa m3/s for trace gas. The methods employ a sealing arrangement for the valve body, which is also specified in this International Standard. The methods are suitable for the verification of valve specifications.

A valve leak rate less than the nominal leak rate specified by the manufacturer during and after the operation enables the specification of such valve operating conditions as operating pressure range, permissible pressure difference between ports, bake-out temperature or operating temperature, and life cycle.

NOTE 1 The data for large valves and valves without a valve body can vary from those obtained during delivery inspection depending on the accuracy of the attachment surface of the vacuum device.

NOTE 2 The data obtained from this procedure is based on the testing conducted on an individual unit of a vacuum valve and they can be different from those obtained during delivery inspection if the test is performed with the valve incorporated into the equipment.



Standard NumberBS ISO 27895:2009
TitleVacuum technology. Valves. Leak test
StatusConfirmed
Publication Date2010-01-31
Identical National Standard OfISO 27895:2009
DescriptorsSeatings, Valve bodies, Valves, Test equipment, Vacuum engineering, Gas flow, Vacuum devices, Leak tests
ICS23.160 Vacuum technology
CommitteeMCE/8/-/4
ISBN978 0 580 61717 1
PublisherBSI
Pages22

About BSI

BSI Group, also known as the British Standards Institution is the national standards body of the United Kingdom. BSI produces technical standards on a wide range of products and services and also supplies certification and standards-related services to businesses.
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