On 08/02/2021 22:01, Vir Campestris wrote:
On 08/02/2021 20:28, John J wrote:
On Sunday, 7 February 2021 at 21:53:11 UTC, Vir Campestris wrote:
On 07/02/2021 11:29, Martin Brown wrote:
Compared to running the sludgy sediment and junk in the dregs of an oil
tank through the injector almost none. Adding enough of it to avoid
running dry again before your next oil delivery would be my suggestion.
I'm confused by this.

The feed pipe to the boiler won't be quite at the bottom of the tank, to
stop it sucking up sludge (or water!).

When the oil get to that level it'll start pulling in air instead. Which
the pump may not like.

How is the sludge going to get _up_ to the feed pipe?

Andy
In practical terms the depth of sludge/water increases slowly over the
years. Older steel tanks were installed with a slope so the back end
of the tank was slightly lower that the offtake and a desludging valve
fitted . A small amount of fuel was drawn from this at service visits.
I've seen a lot without the correct slope and a blanking plug instead
of the valve. Sludge in the filter and further into the system not at
all uncommon.

That makes sense. But still doesn't explain how running the tank dry
will result in sludge in the boiler.

Andy
what happens is that when you add fresh fuel it hits the sludge, and
stirs it up instead of hitting the surface of the existing fuel, Ergo
for a while there is sludge in the fuel


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Climate Change: Socialism wearing a lab coat.