Technical Parameters Parameter Specification Model Fisher TBX-T (Specific model numbers depend on size and rating) Type Engineered Turbine Bypass Valve System (Valve + Desuperheater + Actuator) Valve Design Multi-stage, anti-cavitation trim (e.g., cage-guided with multiple pressure drop stages) Actuator Type Piston Actuator (Hydraulic or Pneumatic) for high-speed, high-thrust operation. Function Pressure Let-Down and Temperature Reduction (Attemperation) Inlet Pressure (Max) Up to 3500 psig (241 bar) or higher, depending on the specific plant design. Pressure Drop (ΔP) Capable of handling extremely high pressure drops, often from full boiler pressure to condenser vacuum. Inlet Temperature (Max) Up to 1050°F (565°C) for superheated steam. Water Injection (Desuperheating) Integrated system to control outlet temperature, typically within 15°F (8°C) of saturation. Stroking Speed 1 to 5 seconds for full travel, depending on size and actuator. Valve Body Material Forged Chromium-Molybdenum Steel (e.g., F22) or similar high-temperature alloys. Trim Materials Stainless Steel with hardened materials (e.g., Stellite) for erosion resistance. End Connections Typically Butt-Weld ends to match main steam piping. Sizes (Pipe Size) 4" to 16" (DN 100 to DN 400) and larger, depending on plant capacity.
