Safety device for a heat exchange equipment filled with pressurized liquid

A safety device for heat exchange equipment fillable with pressurized liquid, which safety device comprises:

• a. a vessel with sidewalls having an overflow for discharging liquid from said vessel when the liquid rises above the level of said overflow,
• b. a diaphragm mounted in said vessel movable by the liquid inside said vessel between a position below the overflow and a position above said overflow to separate said vessel into a lower and an upper space, said upper space being open to the atmosphere,
• c. a pipe for connecting the lower space of the vessel to the equipment to be protected, which pipe is divided in one location into two paths which paths subsequently join before reaching the equipment,
• d. a pump with its pressure side directed toward the equipment in one path,
• e. a one-way valve through which liquid flows to the equipment, in the same path and thus in series with said pump,
• f. an electro-magnetic valve in the other path,
• g. a contact manometer connected to said other path between the equipment and the electro-magnetic valve, and
• h. means for controlling said pump and said electro-magnetic valve based on the pressure measured by the manometer.