Specifications: Valve Size: 2" to 16" (DN 50 to DN 400) Pressure Class: ANSI 150 through 2500 End Connections: Flanged (RF, RTJ), Butt-Weld Temperature Range: -29° to 427°C (-20° to 800°F) [Depends on seal materials] Performance & Flow Characteristics: Shut-Off Class: Standard: ANSI Class V (Metal-to-metal seat) Optional: ANSI Class VI (With soft seal) Flow Characteristic: Equal Percentage (Standard) Rangeability: Up to 75:1 Flow Coefficient (Cv): High Cv values. Specific values depend on valve size, trim, and pressure drop. Noise Reduction: Capable of reductions up to 50 dBA. Cavitation Protection: Designed to operate cavitation-free across its entire operating range. Materials of Construction: Body & Cover: Carbon Steel (WCB), Stainless Steel (CF8M/316), Alloy Steels (WC6, WC9, C12A) Rotor & Shaft: 17-4PH Stainless Steel (standard), with optional hard facings (e.g., Stellite, Tungsten Carbide) for extreme erosion resistance. Seat Ring: 316 Stainless Steel (standard), Stellite, other hardened alloys. Diffuser Stack: 316 Stainless Steel. Actuator & Accessories: Actuator Types: Requires a robust rotary actuator due to potential high dynamic torques. Pneumatic: Fisher 1051/1052 SRD Piston Actuators are commonly specified. Electric: Electric Motor Actuators are also an option. Positioner: A Fisher FIELDVUE™ DVC digital positioner is highly recommended for precise control, diagnostics, and to manage the high-performance capabilities of the valve. Accessories: Limit switches, solenoid valves, supply pressure regulators, etc.
