Where to buy o-ring gaskets for the brew group

#1: Post by **BaristaMcBob** » August 27th, 2021, 12:09 am

Most gaskets have a square cross section. Bezzera's newer models use a gasket with a round cross section - like an o ring. The thing is - these o ring gaskets are impossible to find now a days. Does anyone know of a good source? The gasket measures 72mm O.D. 56mm I.D. 8mm thick.

August 27th, 2021, 12:36 am

One of these, perhaps? Unfortunately, the one that seems closest (for BZ07, Matrix) is the most expensive
https://cafeparts.com/SubCatFilter/5080/728/0:33/3

#3: Post by **Jeff** » August 27th, 2021, 12:39 am

I don't see "round" but I found https://www.cafeparts.com/Products/Gask ... der-Gasket that might have some clues.

(I haven't ordered from them personally)

#4: Post by **TenLayers** » August 27th, 2021, 1:04 am

McMaster-Carr will make them to order
https://www.mcmaster.com/o-rings/cross- ... ape~round/

September 1st, 2021, 8:53 am

Thank you. I looked at the link. All of those gaskets have the square edge. I'm looking for the round edge (like an o ring).

September 1st, 2021, 8:55 am

Thank you. This is a very cool resource...but perhaps for another project down the road.

#7: Post by **CSME9** » September 1st, 2021, 10:14 am

Pasquini in California might carry them. Call them if you don't see the part on their site.

#8: Post by **civ** » September 1st, 2021, 12:00 pm

Hello:

BaristaMcBob wrote: ... gasket with a round cross section - like an o ring.

Then it is probably a standard metric 'o' ring in silicone (best choice) or some other suitable material.

BaristaMcBob wrote: ... impossible to find now a days.

Happens.

After a few years of taking apart espresso machines, I've found that a great deal of the parts that we are sold by OEMs as espresso machine parts are just industrial 'off the shelf' parts. eg: three way valves, pressurestats, klixons, safety valves, fittings, etc.

BaristaMcBob wrote: 72mm O.D. 56mm I.D. 8mm thick.

You can get a metric standard 8.0x55 'o' ring which will work prefectly well, more so if you take into account that when you are measured the old, used OEM one you got an ID of 56 mm.

Your 'o' ring -> 56.00 mm x 72.00 mm
8.0x55 metric -> 55.00 mm x 71.00 mm

See these guys in NH, they have 8.0mm CS 'o' rings: https://www.marcorubber.com/o-ring-size ... metric.htm

There are probably others, this is just the first one I found.

Best,

CIV

#9: Post by **cafeIKE** » September 1st, 2021, 2:21 pm

Espresso Parts has a gasket claimed to fit all Bezzara models BEZZERA CONICAL GROUP HEAD GASKET
"Fits all Bezzera models. Purportedly also fits some editions of the Pasquini Livia, such as the Livia 90 : 72 x 55.5 x 9.3 mm."

I don't see the advantage of a round o-ring on the PF side.

September 1st, 2021, 2:50 pm

cafeIKE wrote: ... I don't see the advantage of a round o-ring on the PF side.

Much less turning force, a.k.a. yanking, is needed for a sufficient seal with an o-ring. Other manufacturers, e.g. Elektra, also use o-rings on the groups on home machines, but use conventional gaskets on the same group on commercial machines.

Bezzera has also used different gaskets on other machines for home instead of commercial, e.g., the Strega's gasket is different from the B2000 AL's.