Valve for welding lamp has valve body with channel connecting inlet to outlet and substantially filled through filter made of porous mass of metal with specific pores having certain diameter

摘要

The valve has a valve body (104) with inlet (105) and outlet (109) connected together through a channel (107) whose main cross-section is taken up by a filter (117) comprising a porous mass of metal. In at least one surface area the porous mass contains several pores each of which has a diameter of about 0.5 to 50 (m. Independent claim describes filter made of a porous mass of metal measured and shaped so that it fits into a channel in the valve. Independent claim describes method for manufacturing valve by mounting through-flow control device in valve and providing space inside a channel for a filter of porous mass of metal.