Method for making a safety valve of a boiler of a device for making a hot beverage, particularly coffee, and safety valve

Method for the manufacture of a device for making hot beverages, particularly coffee, including a safety valve mounted on a wall of a boiler comprising the stages of:

• manufacturing an intermediate valve body defining a seat configured to receive a plug and opening towards an exterior of the valve body through a first opening and a second opening, said valve body comprising at least one peripheral wall located close to said first opening, wherein said at least one peripheral wall comprises a series of teeth configured to be folded over,
• inserting the plug into the seat of the intermediate valve body, wherein the plug comprises an enlarged end that at least partly projects from the first opening;
• a flange;
• a first tapering portion creating a post extending in the longitudinal direction of the seat between the enlarged end and the flange;
• and a second tapering portion at least partially inserted within the second opening of the seat, wherein the second tapering portion is inserted into the second opening such that movement of the plug detaches any calcium encrustation from an edge of the second opening,
• inserting resilient means into the seat of the intermediate valve body, wherein the resilient means are inserted around the post of the plug,
• threading a threaded portion of the valve body into the wall of the boiler,
• subsequently folding over said at least one peripheral wall to define a reaction portion of the resilient means and
• positively pressing said plug against said second opening of said valve body, obtaining a final valve body.