Bonneted knife gate valves from Lined Valve Company have the ability to instantly shut off in solid materials without clogging, as the body cavity, seat configuration and beveled gate of bonneted knife gates are designed for this function. The design specifically addresses fugitive emissions and packing leakage, as round-shaped stems are easier to seal, plus the packing area is greatly reduced, producing a better seal. Their durability and corrosion resistance extends valve life and reduces total cost of ownership. They have a stainless steel body, gland, yoke, gate and stem. 888/256-5779; www.linedvci.com.