Key Parameters Category Parameter Description / Typical Values Valve Body & Size Valve Body Style Single-port, top-guided, balanced or unbalanced trim. Cage-style design. Size Range Typically from 1/2 inch (DN15) to 8 inches (DN200) and larger. End Connections Flanged (ANSI Class 150, 300, 600, 900; PN ratings), Screwed (NPT), Butt-weld. Face-to-Face Dimensions Complies with ISA S75.08, IEC 60534-3-1, and other international standards. Pressure & Temperature Pressure Rating Dependent on body material and class. Common ratings: ANSI Class 150, 300, 600, 900. Max. Operating Pressure Varies with size and class. e.g., Up to several thousand psi (e.g., 1480 psi / 102 bar for a 2" Class 600 valve). Temperature Range Standard: -20°F to +450°F (-29°C to +232°C). Extended ranges available with special seals and materials (e.g., -320°F to +1000°F / -196°C to +538°C). Flow Characteristics Flow Characteristics Equal Percentage, Linear, Quick Opening. Defined by the characterized cage. Flow Coefficient (Cv) A wide range of Cv values available, selected by choosing the appropriate trim size and type. Rangeability Typically high, e.g., 50:1 for equal percentage trim. Leakage Class Leakage Class ANSI/FCI 70-2: • Class II (Standard Double-seated) • Class IV (Standard Single-seated) • Class V (Soft Seat) • Class VI (Soft Seat, Bubble-tight) Materials Body & Bonnet Materials Carbon Steel (Standard), Stainless Steel (304SS, 316SS), Alloy 20, Duplex Stainless Steel, and other alloys. Trim Materials Standard: 17-4PH Stainless Steel. Options: 316SS, Stellite, Hastelloy, etc., for erosion, corrosion, or cavitation service. Seat Rings Stainless Steel, Stellite, or soft-seated (e.g., PTFE, RPTFE). Actuator & Accessories Actuator Type Fisher 657 or 667 Diaphragm Actuator is commonly paired. Spring ranges and diaphragm sizes are selectable to achieve required thrust. Action Air-to-Close (ATC) or Air-to-Open (ATO). Accessories Positioners (e.g., Fisher DVC6200, DVC2000), Transducers, Limit Switches, Solenoid Valves, Air Sets, etc.