High-Temperature Diaphragms

High-Temperature Diaphragms are flexible functional components specially designed for high-temperature working conditions (typically referring to long-term operating temperatures ≥150℃, and in special scenarios, up to over 800℃). Their core function is to simultaneously achieve "medium isolation", "pressure/displacement transmission", or "dynamic sealing" in extremely high-temperature environments. It is widely applied in fields with strict temperature requirements such as petrochemicals, energy, aerospace, etc. Compared with ordinary diaphragms, its core advantages lie in the structural stability, elastic retention and aging resistance at high temperatures, which can prevent material softening, decomposition or failure caused by high temperatures.

High-temperature diaphragms need to break through the performance bottleneck of ordinary diaphragms at high temperatures and meet the following key technical indicators, which is also the core difficulty in their design and manufacture:

High-temperature stability: It does not soften, melt, carbonize or decompose at the rated high temperature for a long time, and can withstand short-term temperature fluctuations (such as thermal shock during start-up and shutdown).

High-temperature elastic retention: It still has sufficient elastic deformation capacity at high temperatures (without permanent deformation), ensuring the accuracy of pressure transmission or sealing function.

Resistance to media and aging: When in contact with high-temperature media (such as high-temperature oil, steam, molten salts, corrosive gases), no corrosion, swelling or chemical degradation occurs.

Structural strength: Tensile strength and tear resistance do not significantly decrease at high temperatures, avoiding cracking caused by pressure differences.

Thermal expansion compatibility: Match the thermal expansion coefficients of adjacent metal/ceramic components to prevent seal failure or structural damage caused by differences in thermal expansion and contraction.
 

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