Espresso Machine Pressure Release Valves
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- Опубліковано 8 лют 2025
- Next in our series of mechanically-focused videos featuring Bill Crossland, he talks to us about pressure release valves -- overpressure, steam pressure and brew pressure releases. How do they work and what are they for? Find out in this primer.
Thank you. I wanted to add a manual valve to my machine to release this pressure and I wasn't sure exactly where it went in the line. This confirmed my thoughts. Thanks so much for sharing this :)
Thank you for taking the time to explain how this equipment functions.
Very helpful. Thank you for taking the time to explain this so clearly.
Thanks Bill & SCG -- I really enjoy this series of lectures ;-)
Awesome! Thank you for sharing -- I didn't know how BAR correlates and BAR is how they always measure it with espresso machines, so good to know how it translates :) - Kat
Good stuff! All this will be good to know when the maschine starts to act up!
Yay! Glad you're digging them :) - Kat
Very informative. Thank you!
Have you removed the brew screen and cleaned up there as well? While backflushing will do some cleaning in this area, could be a good idea -- soak the screen and scrub the diffuser with a brush, etc. - Kat
Yes, I've removed the screen and diffuser a few times over the past few months, but it is always clean as a whistle. Just checked it again and still clean. I guess if your routine is to backflush every 40 shots or so, it does not get much build up.
My pleasure :D - Kat
I recently was given a new home espresso machine. I had it for 3 weeks, brewing a couple times a day only. Long Story short it exploded on me. It was extremely powerful. Very loud and frightening. I contacted the manufacturer and sent pictures. After a week or so got a call back they're gonna refund my money. Btw I sent them proof of purchase as well. Well the guy on the phone said that it's never happened before and he can't see and said there's no way that it could explode. I am curious what you think about exploding home espresso machines and is there something that I may have done wrong to cause this as well? It was so powerful that it broke the metal off the machine that the coffee cup holder that is locked to the machine clamps onto. Thank you so much for your help.
Again an interesting vid, thanks!
Glad you enjoyed it! Although I do hope you won't have to reference this and that your machine doesn't act up :) - Kat
You're welcome! :) - Kat
He talks allot about measuring pressure in "Bars". How does that translate to American pounds? I'm loving theses videos, very History Channel Modern Marvels.
Yes, what he said is correct. I think you're thinking steam boilers, not brew boilers - Kat
After a week away from home, I noticed the pucks in my Rocket R58 (with E61 brewhead) are wetter than they had been before the machine was idled for about 8 days. Now, a couple weeks later and following my regular cycle of backflushing, the wet pucks are still evident. (I pull about 15 to 20 triple shots per week and backflush every other week - or after every 30 to 40 shots.) What would cause this wet puck?
I have a Cecilware Venezia 3, brand new.
When pouring a shot, it makes a squeal... but when I use 2 group heads at once.. it doesn't.
I'm a pre launch for my coffee shop.. so the machine has maybe 6 drinks ever made on it.
What should I do?
I have a Rocket r58 and I always have a slurry when I finish brewing, and when I backflush, not much water comes out the exhaust and when I finish and want to remove the PF, a ton of pressure is released at the PF. Is this an indication that I have a Brew Pressure Release Valve problem? What can I do about it? Thx.
At 3:20 he says that the OPV on a commercial brew boiler is set to 10-12 bar. Is that correct? It sounds odd to me. About 1.3 bar give or take .2 bar seems more normal?
This question its for Bill!
Hello there! I NEED YOUR HELP!
I have a commercial espresso machine La Nuova Era Altea two groups, I’m using it at home and bought it used from a restaurant supplies. Yesterday while I was cleaning the machine, I’ve noticed a new symptom…The water pump makes a very loud noise and the group pressure indicator it’s all over from 0- running over the boiler indicator almost 180 degrees, I don’t know how much pressure that could be, and its fluctuating very fast! I tried to adjust toe rotary pump pressure but no success..:(
Anything I should try suggestions?
Unfortunately, that's not a brand that we carry so we are not familiar with the ins and outs of the machine. Without knowing the details of the machine it would be difficult for us to give a good answer. Sorry. - Steven
Found it Cat, It is useful to remember that 1 bar = 14.5 psi.
hello sir
is there any way to convert the manual e61 brew head to electronic one with the same head
thank you
Could be, yes; It might need to be looked at by a tech. - Kat
FYI 1 BAR is 1 atmospheric pressure unit......