Features Lower total cost of ownership with zero-leakage utility knife gate valve Bi-directional perimeter seat delivers zero leakage in light slurries Integral metal substrate increases seat life Drop-in perimeter cartridge seat can be replaced in-line to lower total cost of ownership One-piece 316 Stainless Steel body for superior corrosion resistance Four post yoke design makes it easier to make packing adjustments and is more efficient for seat repair/replacement. Also makes actuator retro-fitting quick and easy. Built to industry standards including; MSS SP-81 face to face and full port design to Schedule 40.