Weird thing attached to fuel prefilter - wazzat

[MapisM]

The pic below taken by henryf at Boot made me curious, but rather than going o/t in his thread, I thought to open a specific one.
So, does anyone know what's the thing attached to the inlet of the Separ filter, which I highlighted with a red circle on port engine (but visible also on stbd)?
Btw, I would have expected to see a pair of selectable prefilters on such big vessel, and they could probably fit on those very same panels.
But it seems that Princess decided that the space was better used for placing that bit of kit instead - which makes me even more curious...

 

[andy59]

fuel polishing pump using the separ filters ?

 

[Portofino]

Wasp fuel polisher
Your guess why is as good as mine , it may be customer specced
https://www.wasp-pfs.com/products/w-pfs/w-pfs-060

Here it is
https://www.wasp-pfs.com/products/wb-range/wb-10

 

[Portofino]

Getting a bit snake oil ish now ! Magnets

View attachment 75703
Under this pic blurb says

“The WASP Fuel Conditioner is a key component of the PFS Fuel Polishing range. The internal magnet neutralises bacteria cells as well as attracts metal filings.”

What ever happened to a sequence of paper elements and the odd dose of prophylactic additives?

Magnets neutralising bacteria , fab that I’ll solve the growing antibiotic resistance problem and cure all bacterial infection
- yeh right !

It’s credibility rating for me is slumping I,am afraid .

Would those “ metal fillings “ be from the alloy tank , by any chance ? didn’t,t realise AL was magnetic - NOT

 

[MapisM]

Mmm... I'm not sure to get that.
I mean, are those dedicated fuel polishing systems (and if so, why one each side?), with "normal" inline prefilters placed elsewhere?
Alternatively, if the system uses the same Separs for both the occasional cleaning runs and the engines feeds - aside from the fact that I don't like the idea, in principle - how can the blue thingie be bypassed for normal operation, considering that it seems directly attached to the Separ inlet?

 

[MapisM]

Getting a bit snake oil ish now ! Magnets

Yup, agreed.
On top of my previous doubts, that might explain why I've never seen such wasp thingie installed in any boat - and that includes ocean going vessels whose fuel polishing systems could put to shame the equipment used for electrical continuity in hospitals!

Otoh, I wouldn't expect Princess to fit mickey mouse bits on such expensive boats.
There must be something about this stuff which we are missing, I reckon...

 

[Portofino]

Mmm... I'm not sure to get that.
I mean, are those dedicated fuel polishing systems (and if so, why one each side?), with "normal" inline prefilters placed elsewhere?
Alternatively, if the system uses the same Separs for both the occasional cleaning runs and the engines feeds - aside from the fact that I don't like the idea, in principle - how can the blue thingie be bypassed for normal operation, considering that it seems directly attached to the Separ inlet?

Here’s a pic of the complete” Yacht system “
For a pair of engines. Looks like it’s polished before it sees the engine .The separ part being just a component of the rig .
View attachment 75705

Odd really .
I could understand a high end bells n whistles conventional system , with a dedicated large Racor / separ centrifuged then perhaps a sister , ie a pair with vac gauges and WIF , ie a pair of pairs with change over .
Then a pair of MAN 5 or 2 micron s canisters on the engines .

As an option then something like this rig doing the main tanks to seperate day tanks .
You may or may not run it ?
Also tank cocks to drain off and inspect and sight glasses to see the stuff ,also cocked off for safety .

Looks a phaff attempting to clear a fuel blockage with that rig after the CRs have alarmed off on the bridge , and the engines have stopped or running lumpy ?

 

[Portofino]

Yup, agreed.
On top of my previous doubts, that might explain why I've never seen such wasp thingie installed in any boat - and that includes ocean going vessels whose fuel polishing systems could put to shame the equipment used for electrical continuity in hospitals!

Otoh, I wouldn't expect Princess to fit mickey mouse bits on such expensive boats.
There must be something about this stuff which we are missing, I reckon...

Hospitals etc do weekly geny run ups and they obviously have fuel storage issues , it’s not turned over much .
So armed with ‘project fear “ it’s easy to sell this stuff to a middle manager in “ estates “ spending public money .
The public and tax payers would expect nothing less , you can’t not buy it or your arse will be fried in a failed hospital gen set scenario without it .

Back to boats .
I was on a large S/ Sker recently destined for Mexico , so sure there’s gonno be a few ring twitching moments bunkering n a Central American third world country .
So main tank (s) to day(s) with fuel polishing systems would be a sound idea - polished between tanks .
I would not fit them like this ( not withstanding there efficacy) - straight to the motors .

You would obviously buy shares in fuel additive Co,s as well before arriving in Mexico .