Pressure Unit and Class Converter

Enter one pressure and read it in all three units. The two limits that get merged on most enquiries are kept in separate rows: the pressure up to which a coupling can be connected while the circuit is live, and the maximum working pressure the standard permits for couplings built to it.

Enter a value and the conversion appears here.

Reference Limits

LimitMPabarpsi (converted)
Connect-under-pressure limit, ISO 15171-240400about 5,800
Maximum working pressure permitted by ISO 15171-2up to 63up to 630about 9,140

The second figure depends on materials, design, working conditions and application. It is what the standard permits, not a rating carried by every part. Per-model ratings are confirmed on the drawing.

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