| 摘要 |
A valve assembly includes: a valve body defining an annular shoulder that is formed with an annular shoulder groove; a hollow ball member disposed in the valve body; a sealing unit including an O-ring received in the shoulder groove and protruding outwardly of the shoulder groove; a stem extending into the valve body to connect with the ball member and formed with an annular flange seated on the O-ring; an annular packing seated on the annular flange; and an annular pressing member defining an annular neck that cooperates with the annular shoulder to sandwich the annular flange, the O-ring and the annular packing therebetween. The pressing member is coupled adjustably to the valve body, and is adjustable to move toward and away from the O-ring. |
