Pressure Relief Valve

{
  "id": "MLC-T-ENV-022009",
  "term": "Pressure Relief Valve",
  "field": "Environment",
  "definition": "1. Safety device used to prevent operating pressures from exceeding the maximum allowable working pressure of the process equipment. A common pressure relief device is but not limited to a spring-loaded pressure relief valve. Devices that are actuated either by a pressure of less than or equal to 2.5 psig or by a vacuum are not pressure relief devices.\n\n2. Safety device used to prevent operating pressures from exceeding the maximum allowable working pressure of the process equipment. A common pressure relief device is a spring-loaded pressure relief valve. Devices that are actuated either by a pressure of less than or equal to 2.5 pounds per square inch gauge or by a vacuum are not pressure relief devices. This definition does not apply to ethylene production affected sources.\n\n3. Safety device used to prevent operating pressures from exceeding the maximum allowable working pressure of the process equipment. A common pressure relief device is a spring-loaded pressure relief valve. Devices that are actuated either by a pressure of less than or equal to 2.5 pounds per square inch gauge or by a vacuum are not pressure relief devices.",
  "references": [
    "40 CFR 98.6 (CFR 2013)",
    "85 FR 40386; 40 CFR 63.1101 (CFR 2021)",
    "85 FR 41680; 40 CFR 63.7957 (CFR 2021)"
  ],
  "url": "https://mlchart.com/terminology/environment/pressure-relief-valve/"
}