| 主权项 |
1. A structure of a check valve comprising:
a valve casing that has a collar part at an outer periphery of one end of a cylindrical part, and has a valve seat at an other end opening of the cylindrical part; a shaft support part that has an insertion part for a shaft at a center, and in which a coupling part is formed that extends outwardly in a radial direction from the insertion part, and in which an end of the coupling part is connected to an inner periphery of the valve casing; the shaft whose one end is inserted and secured to the insertion part of the shaft support part, and whose other end is projected; a valve in which the shaft is inserted in a center hole in a liquid-tight manner, and that is removably seated on the valve seat; and a biasing means that biases the valve in a seating direction, wherein the collar part of the valve casing is attached so as to be sandwiched between an arbitrary pair of flanges that are joined by facing each other through an annular seal body. |
