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Surge volumes: Minimum distance, in mm – Maximum minimum level: 2.0; 200. Minimum level – trip level: 2.0; 200. The entire range from the maximum level to the empty state must be covered by level transmitters. The nozzles for these transmitters should be located in the main compartment of the steam drum. During operational disruptions, the temperature of the boiler feed water may drop; therefore, the design of the boiler feed water inlet nozzles should allow for temperatures as low as 132°C.
It is recommended to clearly indicate 132°C; otherwise, it may lead to misunderstandings.
It should be a paragraph regarding the requirements for the nozzles at the steam drum (level gauge) outlet. The entire range, from the minimum level to the empty state, must be covered by the level transmitter(s). The nozzles for these transmitters should be located in the main compartment of the steam drum. The measurement range of the level transmitter should include both the highest liquid level and the empty-level condition, and the installation nozzles of the transmitter should be situated in the main part of the steam drum (to ensure accurate measurements). During operational disturbances, the temperature of the boiler feed water may drop; therefore, the design of the boiler feed water inlet nozzles should allow for temperatures as low as 132°C. Due to operational fluctuations, the temperature of the boiler feed water can decrease, so the design of the boiler feed water inlet nozzles must take into account the possibility of temperatures dropping to 132°C℃