Having just dug a little deeper it would appear the EAX5 does come with a brass outlet, so that isn’t a concern, but I did notice that the EAX5 pumps I was seeing did not have the NSF mark, not sure if that means it’s actually much different or if it just wasn’t certified. Either way I don’t think a 1/1.5 duty cycle is good enough for espresso use.
On Friday, September 4, 2020 at 8:42:55 PM UTC-4 Brian wrote: > > 1. With ulka vibratory pumps the E series is the high pressure series. > 5 is the flow curve, so you should see nearly identical flow with each of > those pumps. This can be seen on the Spec sheet for the E series pumps. > > <http://files.cemegroup.com/elettropompe/0/60/Scheda%20tecnica%20E%20high%20pressure.pdf?v=636869779789441307> > The > biggest difference on all of these is the duty cycle, and the materials. > The EAX pump is plastic, while the EX and EFX is brass. The duty cycle > (the > amount of time it can run/the amount of time it needs to rest in minutes) > is 1/1.5 for the EAX, 1/1for the EX (at 120VAC) and the EFX is 2/1 (same > for the EX @220VAC). So basically the EAX is the least durable, while the > EFX is the most durable. Unless you are considering something like flow > profiling there is no reason to get the EFX over the EX, but the EAX is > plastic with a much lower duty cycle, so should probably be avoided for > this application. > > On Friday, September 4, 2020 at 2:53:42 PM UTC-4 Ira wrote: > >> Hello jjk3, >> >> >> Tuesday, September 1, 2020, 3:45:15 PM, you wrote: >> >> >> Just wanted to get some confirmation on using the Ulka EX5 vs EAX5 in my >> Brewtus II. I currently have the EX5 (41 watts, duty cycle 1/1). Am I >> correct in that the EAX5 (52 watts, duty cycle 1/1.5) can also be used? >> Essentially any vibe pump will work. Some have internal diodes and some >> need an external diode and some flow slightly more than others. It's >> possible that different pumps will slightly affect the rate of rise of >> pressure at the start of the brew cycle, but that's about the only >> difference you might see. So, likely the least expensive solution that will >> fit is the best one. >> >> -- Ira >> > -- You received this message because you are subscribed to the Google Groups "Brewtus" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/brewtus/104381ea-f69b-415a-b71b-594ad4467081n%40googlegroups.com.
