Silicone gasket for E61 group heads

Group head gaskets are crucial  components for a good extraction. As they are subject to wear and tear they should be changed regularly, which can easily be done by the user.

The DVG group gaskets are made from food grade FDA silicone. Unlike regular gaskets that are made from rubber these do not have any smell or taste whatsoever, and are easy to change since they will not bake rock hard like rubber does.    

If you have ever struggled to change an old gasket you probably could not help but notice the awful smell and the black soot that comes off the rubber (and that is what you are potentially consuming with each drink)

Which thickness is appropriate and good for your machine?

In general terms, the thickness of the gasket will determine the “lock-in” position of the portafilter handle. Ideally you want the handle to lock in directly towards you (6 o’clock position). If the gasket is too thin it will lock in too far, if it is too thick it will not lock in enough

For most machines the 8mm or 8.5mm will be sufficient (they're pretty standard). For cases where the portafilter still appears not to be tight enough (and leaking water) the thicker 9mm might be the solution. 

Size (9mm):  outer  D= 73mm
                      inner  D= 57mm

--> Please note that although the gaskets are strong under compression, you should never use a sharp tool like a screwdriver to install them. This may tear the silicone.