why pegging is required for deaerator in power plant nd why
maintain the constant pressure in deaerator 3.5 kg/cm2.
Answer Posted / alex
Pegging steam is given in a deaerator to stabilize pressure fluctuations during start up/ ramp up/down conditions. Sudden pressure drop in the deaerator due to conditions like safety valve lifting can cause steaming of water in the BFP suction line. Pegging steam line is given to prevent this condition.
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