What type of pressure control automatically shuts down the burner if the operating control fails?

The high limit control is designed to safeguard the boiler system by automatically shutting down the burner if it detects that the operating control has failed and the pressure exceeds a predetermined level. This feature is crucial for ensuring the safety of the boiler, as excessively high pressure can lead to dangerous situations, including the risk of explosion or equipment damage.

In many boiler systems, the operating control maintains the normal operating pressure, and if for any reason it fails to function, the high limit control acts as a safety net. The high limit control is sensitive to pressure levels and is set above the normal operating range, allowing it to intervene when necessary to prevent unsafe conditions.

Other types of controls, like modulating control, adjust the burner output based on demand rather than acting as a safety shutdown mechanism. Operating controls are primarily responsible for maintaining the desired operating conditions but do not provide the same level of safety intervention as the high limit control. Emergency control may also refer to equipment designed for rapid response in emergencies but is not typically focused on the specific failure of the operating control related to pressure management.