Regulators can and do fail especially if they are used improperly.
These failures can result in over-pressurization of the low pressure side of the regulator and any equipment downstream of the regulator. Most regulators are equipped with a pressure relief port to protect the regulator. However, these relief ports must not be relied upon to protect the downstream process system. The process system should be protected from over-pressurization independent of the regulator. Click here to request more information.