For expeller seal combined with packing, adjust degree of tightness of gland in time and replace packing termly, so as to insure a little of clear water through the shaft all the time.

• 对于付叶轮加填料组合式密封，应及时调整填料压盖的松紧并定期更换填料，以保证始终有少量的清洁水通过轴。