The V-Series self-cleaning screen filtration system from VAF Filtration Systems has a mechanically driven cleaning process. The bidirectional hydrodynamic drive mechanism has no limit switches or pistons. It offers simple controls, a low-flush flow, cleaning efficiency and low maintenance. The 12- to 15-second flush cycle is automatically initiated when a pressure differential across the screen increases to 7 psi. The filter remains online and the filtration process remains uninterrupted during the brief cleaning process. The flush discharge results in minimal waste. 303/425-4242; www.vafusa.com.