A wide variety of hardened trim options are available on Gate, Seat and Wear Ring and long life . Electromech Technical Services Knife Gate valve provides reliably on verity of tough application includes corrosive and abrasive application area, key aspects like operating load .easy of operation, service condition etc. are considered in design and construction to ensure long and maintenance free life The knife gate valve is simple to use and requires no maintenance. They have a longer life and are used for stopping and controlling the flow of abrasive slurries.