Gland heater: 1. Steam seal role heater vent 1.1 steam seal and seal exhaust fan heater is connected to the vacuum created 0.95ata weak, the turbine shaft seal and valve stem leakage into steam and air flow to steam seal heaters, without infiltration bearing lubricant contamination or spread of factory space, to ensure the safe operation of the unit. 1.2 Recycling and stem seal leakage into the turbine steam condensate or feed water heater to improve the plant cycle efficiency.