| 摘要 |
The present invention relates to a butterfly valve and, more specifically, to a valve integrated with an expansion pipe to have the face-to-face length of a butterfly valve, which is easy to install and replace as an existing valve installed on a pipeline can be replaced by a flange moving in the discharge direction of the flow passage without the cutting of the pipeline and weld work for reintegrating a cut part of the pipeline; to reduce the installation cost; and to prevent a leak from the valve with the use of a push bolt. In addition to this, the valve integrated with an expansion pipe to have the face-to-face length of a butterfly valve allows the effective installation and replacement of a valve by adjusting the length of a valve body using an extendable flange; reduces the installation cost by eliminating the cutting and welding of an existing pipeline; and prevents a leak of the valve by maintaining the airtightness of the valve using a guide ring and the push bolt. |
