Issues regarding the steam turbine condenser exhaust safety valve
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What is the purpose of the exhaust safety valve in a turbine condenser? ? ? I’m not quite sure; is there anyone who can explain it in detail?
The condenser’s vent safety valve is used to protect the condenser and the steam turbine’s exhaust pipes, preventing the pressure within them from rising above atmospheric pressure (as the exhaust side of the low-pressure cylinder cannot withstand high pressures). The manufacturer’s instructions specify that condensing steam turbines are not allowed to operate with exhaust vented to the atmosphere. Therefore, a safety valve for venting to atmosphere is installed. When the vacuum drops during operation and the exhaust pressure rises rapidly to slightly above atmospheric pressure (about 0.02–0.04 gauge pressure), the asbestos gasket (thin aluminum sheet) will break. At the same time, steam is discharged into the atmosphere through the exhaust safety valve in the condenser, preventing damage to the low-pressure cylinder.
Impressive, I roughly understand now. . .
Is the exhaust safety valve calibrated once a year?