Working pressure, test pressure and other ratings: what to verify
Several pressure figures can attach to one valve, and they are established in different ways. Mixing them is the most common cause of a mismatched enquiry.
A valve enquiry that says "rated 200 bar" is ambiguous. So is one that says "tested to 300 bar". Both are common, both are meant helpfully, and neither says which rating is meant or under what conditions it applies.
ANYI publishes one pressure figure per exact model, in the unit the factory recorded it in, labelled working pressure. Anything else - a test figure, a burst figure, a safety device setting - is a different statement, and where the factory records it, it appears as its own line.
Four figures that are not the same figure
- Working pressureThe pressure the valve is recorded as being for in service. On ANYI pages this is the published figure: 30MPa on the XF-35H, 2175Psi on the CGA320A, 3MPa on the QF-15G. It is not converted between units before publication.
- Test pressureA figure from a test procedure, higher than the working pressure by a factor the procedure sets. It describes a test, not a service condition, and it is not a permission to operate there.
- Safety device settingWhere a model records one, it is its own line and can be a range - the XF-35H records 40.5MPa to 45MPa. It is a property of the device, confirmed per exact model.
- Cylinder ratingThe cylinder has its own rating, set by its own standard and its own markings. The valve rating does not establish it and does not replace it.
Why the units are left alone
Units are part of the fact, not decoration. A model recorded in Psi and a model recorded in MPa have not been normalised to a house unit, because normalising means rounding, and a rounded figure that then travels into a specification is hard to trace back. When you compare two models, convert deliberately and keep the original alongside your converted value.
Questions about pressure figures
Can you confirm the test pressure for a model?
We can tell you what the factory record holds for that exact model. Where there is no record, the page says so rather than offering a figure derived from the working pressure.
My standard quotes a figure in bar and your page shows MPa. Is that a problem?
No, but state the conversion you used when you send your requirement, so we are comparing the same number.
Does a higher working pressure mean a better valve?
No. It means a different valve. Selection follows the service condition, not the largest number available.