Installation of Glass Lined Mechanical Seal for Agitator

The picture above shown is the top of an agitator. While there are blades contained in the agitator. There are mechanisms that helps to turn the blades. As shown, there is a high powered motor mounted on top and coupled with the blade’s shaft. In the middle sits a glass lined mechanical seal, hugging the shaft and sealing the agitator, preventing gases from leaking outwards.

SP PAC-SEAL Installation of Glass Lined Mechanical Seal for Agitator will be described as follows.

Before starting the replacements like everything else, preparation is highly scrutinized. The correct size of mechanical seal must be ready on-site. Due to the size of this agitator, an overhead crane is necessary to proceed with maintenance or replacement works. Also for this design of agitator, two C- spanner of the correct size are required. Other tools such as  an electric nut driver comes in handy.

Once preparations are done, work shall commence. The cables connecting to the electric motor are disconnected and tied away safely.

Next is the removal of coupling between shaft and electric motor. Once the coupling is removed, the electric motor shall be secured to a crane, before loosening the nuts of gearbox to the housing. The electric motor and gearbox is lifted away together and set aside.

Upon removing the motor and gearbox, the shaft shall be secured with a crane on the top end, while the bottom end of the shaft shall have soft cloth or leather to prevent the shaft from damaging the interior of the agitator. After securing both ends, the mechanical seal usually has a setting stopper to secure it before loosening for removal. Once the settings are placed back in and secured, the C-spanner is then used to open the nut locked to the shaft and supporting it at the housing.

Bare in mind, once the nut is loosen, the shaft may drop downwards. After the nut is removed, the shaft is let down slowly, until touching the bottom. The securing of shaft can then be released. Remove the housing would give much needed space to then remove the mechanical seal.

The procedure is then reversed with a new mechanical seal installed.