| 摘要 |
The present invention relates to a valve installed at the middle of a pipe which is a flow path for fluid, and controlling the amount, flowing direction, and pressure of the fluid, and, more specifically, to a glove valve having a dual sealing piston structure, wherein the glove valve blocks the flow path or controls the flow rate of the fluid by sticking a valve to a valve sheet using a screw. The glove valve comprises: a handle transmitting a rotating force; a screw spindle coupled to the handle, and consisting of a bracket coupling part and a threaded part, wherein the bracket coupling part has an outer circumferential surface having multiple spindle rings; a bracket inside which a thrust ball bearing is installed, and including a bracket cover penetrated by the screw spindle, sealed by the spindle rings, and coupled to a bracket washer with a bracket nut; a cylinder coupled to the bracket, outside which a flange is formed, and inside which a backup ring and a dust seal are formed; and a valve coupled to the threaded part, having a terminal portion to which a valve disc having a valve seal groove is coupled, and having multiple valve rings for sealing a gap between the same and the inner wall of the cylinder, thereby minimizing the mobility of the valve, minimizing the amount of foreign matters flowing between the cylinder and the valve by minimizing damage to the seal for sealing, and reducing maintenance costs for the valve. |
