SPX announces a complete solution to a “dirty, rag-full problem” in municipal and industrial treatment services. The Lightnin clean edge impeller-shaft assembly for use in all services where a non-ragging mixer impeller is either indicated or needed. It is specifically designed for this critical and rigorous service, the assembly sheds all fibrous debris while delivering superior hydrofoil impeller performance. The patented Shaft Guard Design eliminates any buildup that would collect on any solid shaft attachment.