The TYCO Models BFV-300 and BFV- 300C Grooved End Butterfly Valves are indicating type valves designed for use in fire protection systems where a visual indication of open or closed valve condition is required. They are used, for example, as system, sectional and pump water control valves. They have grooved inlet and outlet con- nections that are suitable for use with grooved end pipe couplings listed or approved for fire protection systems