Modification of Pump Mechanical seal

We have a urea solution pump used for recovery of urea dust. Due to discontinuous and frequent start ups and shutdowns of the pump, the mechanical seal had a history of failures after every two to three months. The mechanical seal of the pump had to be attended every alternate month which caused lots of man hours and cost the company heavy consumption of inventory.
After some research it was decided to replace the existing mechanical seal with gland packing. This was done such that no machining of pump was required so as to revert back to the original design if necessary. The original seal design is shown below

The seal was modified with a spacer and a gland plate such that the gland plate was the size of the mechanical seal and a flushing line was provided for the packing. The modified seal arrangement is shown below