Retrofit shaft seal from gland packing to mechanical seal in pulp and paper mills is proceeded but it is only limited to the major machines such as pumps for cooking and chemical or refiners. Gland packing is still applied in raw material tanks or horizontal agitators for chest.
This is because the horizontal agitators often occur shaft runout and vibration. These factors are long deflecting shaft and changing tank liquid level, etc. So, it is thought that mechanical seals cannot be applied.
However, there is a mechanical seal that can absorb such shaft runout and vibration by using rubber bellows. Furthermore, fully split design can reduce cost and time of the maintenance.
We would like to introduce the fully split mechanical seal which can be applied accommodate the shaft runout and vibration for horizontal agitators with actual experiences.