From 1.6 MPa to 0.9 MPa: Why Does the Same Valve "Lose Strength" at High Temperatures? — A Guide to Using Pressure-Temperature (PT) Rating Curves
Release time:
2025-09-09
The pressure temperature rated curve (PT curve) - it determines whether the valve can be used under your operating conditions, and how much heat and pressure can be used.
The pressure temperature rated curve (PT curve) - it determines whether the valve can be used under your operating conditions, and how much heat and pressure can be used.
The same model can withstand a pressure of 1.6 MPa at 20 ℃, but may only have 0.9 MPa remaining at 180 ℃;
If the steam is still selected at room temperature pressure at 200 ℃, the valve body will creep, seal leakage, and even shell cracking during operation.
First circle the PT curve, then look at the aperture Cv、 The material is the only one that can stand up to all subsequent selections.
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