Groove type fire butterfly valve is a series of new connecting valves designed and manufactured by introducing the same advanced products of the United States and Germany. It has the advantages of fast installation, simple, safe, reliable, not limited by the installation site, convenient for the maintenance of pipes and valves, vibration isolation and sound insulation, overcoming the difference caused by the connection of different shafts of pipes within a certain angle range, and solving the thermal expansion and contraction caused by temperature.