Systems and methods for monitoring relief valve drain in hot...

Data processing: generic control systems or specific application – Specific application – apparatus or process – Mechanical control system

Reexamination Certificate

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Details

C137S062000, C137S066000, C236S02100R

Reexamination Certificate

active

07970494

ABSTRACT:
A system is disclosed that advantageously monitors a status of a relief valve coupled to a water heater or other pressure vessel. By monitoring the relief valve, the system can limit the energy and water wasted resulting from the relief valve's failure. The system can have first and second sensors that monitor a temperature and pressure within the relief valve, and a water flow from the relief valve, respectively. If the temperature or pressure within the relief valve exceeds predetermined thresholds, or a water flow from the relief valve continues for greater than a predetermined interval, the system can restrict a flow of gas, electric current, or water to the water heater.

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