Patent attributes
A connection seal structure for a chemical valve (1) in which a resin manifold base (3) and a resin valve assembly (4) are connected to each other includes an H-shaped resin ring (20) interposed between a connection portion (7) of the base (3) and a connecting portion (19) of the valve assembly (4). The connecting portion (7) of the base (3) and a corresponding portion of the H-shaped ring (20) are formed with groove-ridge lines (21, 22) respectively, which engage with each other in a groove-ridge relationship. The connecting portion (19) of the valve assembly (4) and a corresponding portion of the H-shaped ring (20) are formed with groove-ridge lines (23, 24) respectively, which engage with each other in a groove-ridge relationship. At least one of the groove-ridge lines (21, 22) and at least one of the groove-ridge lines (23, 24) are provided with press-fit allowances in a direction of wall-thickness of each groove-ridge line (21-24).
