Gate Valves Gate Valve - Extended Bolted Bonnet for Cryogenic Service | Fluitek Gate Valve - Extended Bolted Bonnet for Cryogenic Service | Fluitek The Gate Valve with Extended Bolted Bonnet for Cryogenic Service by Fluitek is designed for low-temperature applications, operating efficiently below -50°C. These valves are crafted from austenitic steels like CF8/CF3 and CF8M/CF3M, featuring metal seals and optional PTFE-based soft inserts. Precision machining ensures smooth operation. Fluitek offers... View Butt Weld 600 lbs ANSI Austenitic Steels