Flow control valve coupling structure

A coupling structure for a flow control valve, the coupling structure comprising:

• a fitting portion having a male thread that is formed on a peripheral surface of the flow control valve;
• a coupled member having a coupling hole to receive the flow control valve;
• and
• a cylindrical elastic sealing member engaged with the coupling hole to seal the space between the flow control valve and the coupling hole, wherein the elastic sealing member has an inner surface defining a mounting hole in which the fitting portion is fitted, a female thread formed on the inner surface, the female thread being mated with the male thread of the fitting portion, and a pressed portion formed on the inner surface defining the mounting hole, and
• wherein the pressed portion is pressed by the fitting portion to radially expand the elastic sealing member when the fitting portion is fitted in the mounting hole, and wherein the coupled member includes a front surface and a rear surface, the elastic sealing member being engaged with the coupled member from the front surface, and the coupled member includes a stopper socket, which is formed adjacent to the coupling hole in the front surface without extending through the coupled member, and wherein the elastic sealing member includes a stopper, which projects from the elastic sealing member, the stopper being received in the stopper socket.