Key Parameters Category Parameter Name Description & Typical Values Valve Specifications Valve Size 1" to 8" (DN 25 to DN 200) End Connections Flanged - ANSI Class 150, 300, 600. RF (Raised Face) or RTJ (Ring Type Joint). Body Styles Globe (Standard), Angle (for erosive/cavitating services). Body Materials Carbon Steel (WCB) - Standard. Stainless Steel (CF8M/316), Alloy 20, Duplex Stainless Steel, and other alloys available. Pressure & Temperature Pressure Rating Up to ANSI Class 600. Temperature Range Standard: -50°F to 450°F (-46°C to 232°C). Extended ranges possible with special packing, seals, and materials. Internal Parts (Trim) Trim Design Cage-Guided, Balanced Plug - Standard. Flow Characteristics Equal Percentage (Standard), Linear, Quick Open. Trim Types Standard Trim, Multi-Stage Anti-Cavitation Trim, Low-Noise Trim. Leakage Class Class II, III, or IV (metal-to-metal). Class IV or V (with optional soft seat). Trim Materials Stainless Steel (Standard), Hardened Stainless Steel, Stellite, Tungsten Carbide. Flow Capacity Flow Coefficient (Cv) Varies significantly by valve size and trim. Consult specific Cv tables. Example: A 3" N551 can have a Cv from ~50 to over 200. Actuator (Typical) Type Fisher 657 or 667 (Spring-and-Diaphragm) for most applications. Piston actuators for high-thrust needs. Action Air-to-Open or Air-to-Close (field-reversible). Standard Signal 3-15 psig (0.2-1.0 bar).
