Page 215 -

The Practical Pumping Handbook ======================= :iiiiii i ii i; iiiiiiii::iii:i:ii ::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::: ....... iii-----~

9 Increase the shaft strength. (See 11.4.2.2)
Poor installation
9 Skills training needed
9 Use a C-flange motor

9 Check pump base and foundation
9 Eliminate pipe strain
9 Correct shaft alignment
9 Eliminate belt drives
Premature failure

9 Clear plugged oil return holes
9 Correct the bearing selection
9 Check shaft loading
9 Minimize vibration. (See Figures 11.1 and 11.2)

11.5.6 Packing

Worn sleeve
9 Change to a non-fretting mechanical seal

9 Upgrade the material selection
9 Use less abrasive packing
9 Control the solids in pumpage
High temperature

9 Upgrade material selection
9 Increase cooling effect of flush
9 Change to a mechanical seal
Chemical attack
9 Upgrade the material selection

9 Change to a mechanical seal
Over-ti ghten i n g gla nd
9 Skills training needed
High pressure
9 Check pump operation for low flow

R 194