I have sailed with the CIP system a few times and it saves a huge amount of time cleaning Purifiers, as has already been said, you only have to open the purifier for major overhauls, (bearing changes) and if you CIP clean first, that is much easier and quicker.
It is also very good for cleaning the oil heaters, which are often very difficult to clean manually.
If you spend some time permanently installing the tank/pump unit in the correct place and have long hoses with quick fit connections to the purifier and heater it only takes a few minutes to start and then it can be left to itself while you do something else, with just the occasional check on the liquid level and temperature.
Laval do supply CIP cleaner specially designed for the purpose, with additives to stop them foaming and overflowing the circulating tank. At different times they have supplied a single type for LO and FO purifiers (one Acid & one Alkaline) and a single type for both, I don't know what their current recommended chemical is.
One drawback is that these are very powerful cleaning chemicals, they are not Oily Water Seperator friendly!!! They will totally destroy your coalescer filters.
YOU MUST KEEP THE USED CLEANER OUT OF THE BILGE SYSTEM AND EITHER INCINERATE IT OR PUMP IT ASHORE.
It is always better to ask a stupid question than to do a stupid thing.