Shaft seal apparatus

摘要: A shaft sealing apparatus 109 comprising a seal case 1 mounted on tank shell 102 of rotary equipment, ring 3 fixed to the 106 stationary 4 held in opposite and movable axial direction, coil spring 5 thrust against 3, gas feeding channel 6 formed out series passages running through opening between two end faces 31, 41 rings 4, jetting mechanism jet, selectively, 71 such as nitrogen sterilization 72 steam into 41. In normal operation, functions at relatively rotating portions while holding ends non-contact state, by mode, is jetted instead 71, sterilizing least