Key Parameters Category Parameter Name Description & Typical Values Valve Specifications Valve Size 1" to 12" (DN 25 to DN 300) End Connections Flanged - ANSI Class 150 through 2500. RTJ (Ring Type Joint) is common for high-pressure services. Body Styles Globe (Standard), Angle (Excellent for severe erosive and cavitating services). Body Materials Carbon Steel (WCB) - Standard. Stainless Steel (CF8M/316), Alloy 20, Duplex Stainless Steel, Inconel. Pressure & Temperature Pressure Rating Up to ANSI Class 2500. Temperature Range Standard: -50°F to 450°F (-46°C to 232°C). Extended ranges from cryogenic to 1100°F (593°C) with special components. Internal Parts (Trim) Trim Design Cage-Guided, Balanced Plug - Standard. Trim Types Standard Trim, Multi-Stage Anti-Cavitation Trim (e.g., Whisper Trim III), Low-Noise Trim. Flow Characteristics Equal Percentage (Standard), Linear. Leakage Class Class II, III, or IV (metal-to-metal). Class IV, V, or VI (with optional soft seat). Trim Materials Stainless Steel (Standard), Hardened Stainless Steel (17-4PH), Stellite, Tungsten Carbide for extreme abrasion. Flow Capacity Flow Coefficient (Cv) Varies significantly by valve size and multi-stage trim design. Multi-stage trim inherently has a lower Cv than standard trim for the same valve size. Must be carefully calculated using Fisher sizing software. Actuator (Typical) Type Fisher 1051/1052 Size 60 or larger Piston Actuator is typical for high-thrust requirements. Large diaphragm actuators (e.g., Type 99) may be used for less demanding services.
