The clapper check valves are not elements thought to be used in sewages, because this type of fluids are characterized by carrying solids and other types of elements in suspension. All this elements block the clap at the closing moment. Even they are tangled in the restraints and other elements avoiding its right functioning.
As it does not have articulations, it does not produce dead spaces where impurities are accumulated and polymerized.
• At the closing moment, if the ball comes up against some obstacle, this will made the balll spins passing in this way the solid, closing in the presence of solids without difficulty.
• A watetight sealing, because of this one is produced between the elastomeric coating ball and the metallic seat.