ACS Minima overpressure

njlhyde

I have had my Minima for 18 months (great machine) and it has been rock steady on an over pressure (water return to the tank) setting of 9.5 bar. In the last few weeks it seems to have shifted to 10 or just over.
I know 10 bar is still ok but just wondered why it changed only recently.
I use an Osmio Zero so shouldn’t be an issue with scale?

DavecUK

njlhyde In the last few weeks it seems to have shifted to 10 or just over.
I know 10 bar is still ok but just wondered why it changed only recently.
I use an Osmio Zero so shouldn’t be an issue with scale?

Is this change in pressure when used against a blind filter both times?

njlhyde

DavecUK

I see it with a blind filter and when making coffee. Sometimes on the first go it can go just over 10 bar then drop back to 10 on the following when back flushing

DavecUK

njlhyde I’d say for now, just adjust the pressure a bit lower, to what you want (e.g. 9 bar)…if it varies again, then perhaps the valve needs a clean and slight lubricate…(depending on the water, there might be deposits)?

njlhyde

DavecUK

Thanks Dave

I’ll adjust and monitor.

I’m guessing because I use an Osmio zero that there is no scale.

DavecUK

njlhyde If you use an Osmio Zero, then it should be clean as a whistle inside.

P.S. why are whistles so clean inside?

JahLaza

DavecUK why are whistles so clean inside

What is ‘right’ about rain? (As right as rain)🤔🤔🤔🤔

audiomacgyver

DavecUK

DavecUK my believe is that whistles only make a nice pure tone if they are clean. Even a little bit of dirt would add some distortion or prevent the whistle sound from being generated. This would apply more to natural wood or reed type whistles.

njlhyde

DavecUK

Further to this I have concluded that my group pressure gauge is faulty and does not go back to zero (around 1 bar no load).

where is the best place to find a replacement without horrendous international delivery charges.

another option for me to buy a flow kit with gauge included. There’s a few out there now - I find Coffee sense cheapest from Ireland. What are your thoughts?

thanks

Nick

DavecUK

audiomacgyver Makes you wonder about the state of a football referees whistle…..

dutchy101

That’s what VAR is SUPPOSED to be for

DavecUK

dutchy101 VAR…nope….whoosh, over the top?

PortafilterProcrastinator

njlhyde FWIW in photos of older Minimas before the branded gauge they were Orman. Seem to be readily available.

Cuprajake

i had the coffee sensor kit, was nicely made

DavecUK

PortafilterProcrastinator Most gauges (99%) on all espresso machines, are made by Orman.

Cuprajake

DavecUK who makes the other 1% 😜

DavecUK

Cuprajake who makes the other 1% 😜

I actually don’t know…probably the chinese.

njlhyde

Anyone got a link for a replacement gauge?