Delta industrial knife gate valves are designed to perform in the most arduous conditions with reliability and performance view our full range. Delta industrial class 150 knife gate valves contact us for more information the delta industrial 15s and 15l series valves are a fully rated asme class 150 pn20 guided shear gate designed for heavy duty applications. Safety is our number one priority and we have rigorous measures in place to protect our people partners and communities while continuing to support our customers at this time.