Patent ID: 7858900

Claim:
A method of making a valve from first and second tubular parts, wherein at least one of the parts is made from an alloy which contains metal with a boiling point which is in the range of, or lower than the melting point of the alloy, the parts being joined in a welding process wherein a laser beam is transmitted at least partly into a gap between first and second edges of the parts, and wherein vapours are conducted away from the component via the gap, the laser beam being focused to form a focus point having a size in the range of, or larger than a distance between the edges at an outer surface of the parts, wherein the first part is formed with a neck extending in a longitudinal direction from the first edge into a complementary socket which extends from the second edge into the second part whereby the position of the parts relative to each other is stabilised and the first and second edges are located adjacently at the distance and whereby the neck forms backing for the welding and thus prevents that molten material flows into an inner space of the tubular parts.