The brewing groups on San Remo espresso machines are quite standard types of brewing groups. In the case of a San Remo Amalfi the brewing group used is a so called ring brewing group. A ring brewing group is a casted round group head with a 3 way solenoid valve on top of the group head.
The shower screen used on this brewing group is a 60mm friction fit shower screen, which you also find on e61 style of brewing groups. The portafilter gasket used to keep this shower screen in place has a outer diameter of 73mm and a inner diameter of 57mm. the portafilter you can use on this brewing group has a ear orientation of 90 degree and the thickness is 6,3mm.
As mentioned earlier on top of this brewing group you will find a 3 way solenoid valve. This can be a 120V model or a 220/230V version. this does depend on what kind of espresso machine it is.
