| 摘要 |
To reduce a weight of a valve main body of an expansion valve formed by an extrusion molding of a metal material such as an aluminum alloy or the like. A valve main body 100 is made of a material obtained by an extrusion molding of a metal material such as an aluminum alloy or the like. Two pair of holding faces 101 a and 101 b, and 102a and 102b are formed on both side face 100a and 100b in the extruding direction of the valve main body 100, and the other portions are to be concave as much as possible, so that the weight can be reduced. The holding faces 101 a and 101 b and the holding faces 102a and 102b are parallel faces, and come to be holding faces for chuck claws C 1 and C 2 at a time of machining. |
