Thermal expansion relief valve

{
  "id": "MLC-T-ENV-027942",
  "term": "Thermal expansion relief valve",
  "field": "Environment",
  "term_source": "Thermal Expansion Relief Valve",
  "definition": "Pressure relief valve designed to protect equipment from excess pressure due to thermal expansion of blocked liquid-filled equipment or piping due to ambient heating or heat from a heat tracing system. Pressure relief valves designed to protect equipment from excess pressure due to blockage against a pump or compressor or due to fire contingency are not thermal expansion relief valves.",
  "subject": "Built environments",
  "references": [
    "40 CFR 63.641 (CFR 2016); 85 FR 49084; 40 CFR 63.255 (CFR 2021)"
  ],
  "url": "https://mlchart.com/terminology/environment/thermal-expansion-relief-valve/"
}