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Cold Differential Set Pressure

Cold Differential Set Pressure

Cold Differential Set Pressure

(OP)
Hi,

I have a general question regarding Cold Differential Test Pressures of Relief Valves. I understand the concept and it's relationship to Backpressure.

What i'd like clarification on is, how does operating temperature affect the CDTP, why and by how much.
How do designers know how much compensation is needed based on the Operating temperature. Is there a rule of thumb or a specific formula?

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