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Actual Max Working Pressure of Class 125 Brass Fittings at Room Temp.

Actual Max Working Pressure of Class 125 Brass Fittings at Room Temp.

Actual Max Working Pressure of Class 125 Brass Fittings at Room Temp.

(OP)
I have an existing compressed air installation where I need to increase the working pressure of the system from 125 psig to 175 psig. There are a couple of 3/4" cast brass fittings in the system and I am trying to determine if I need to replace them or not to meet the higher pressure. In looking around the internet and various reference texts I have not found a solid reference that says that a class 125 fitting is rated to ### psi at a temp. One reference that I did find was a note from a Merit Brass stating that Class 125 fittings are good for 200 PSIG at 72°F, however I do not know if I can apply this across all MFGs.

Anyone run across a reference or dealt with this previously?

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