Key Specifications & Parameters Parameter Specification Model Series GX (Comprises a valve body and a 657/667 diaphragm actuator) Valve Type Globe Valve, Characterized Cage-Guided Actuator Type Spring-and-Diaphragm, Field-Reversible (for Air-to-Open or Air-to-Close action) Sizes Valve Body (Port Size): 1/2 inch to 3 inches (DN 15 to DN 80) Actuator Size: 3 sizes (e.g., 30, 45, 70) to match valve size and pressure requirements. End Connections Screwed (NPT): Standard Flanged: ANSI Class 150 & 300 RF Socket Weld: Available Pressure Ratings ANSI Class: 150, 300, 600 (depending on body size and material) Max. Shut-off Pressure (P₁ - P₂): Dependent on actuator size and spring range. Consult performance tables. Temperature Range Standard: -20° to 400°F (-29° to 204°C) Extended: -50° to 450°F (-46° to 232°C) with specialized packing. Body Materials Standard: Carbon Steel (A216 WCB) Options: Stainless Steel (CF8M / 316), Alloy 20 (CN7M), Bronze. Trim Materials Standard Trim (Cage, Plug, Stem): 316 Stainless Steel Seat Ring: 316 Stainless Steel Soft Seat: PTFE (Teflon) for bubble-tight shut-off (ANSI Class VI). Flow Characteristics Equal Percentage (Standard, via characterized cage) Linear (Optional) Flow Capacity (Cv) Ranges from approximately 1.5 (for 1/2") to over 200 (for 3"), depending on trim level. Rangeability 50:1 Leakage Class ANSI Class VI (Bubble-tight) with standard PTFE soft seat. Actuator Spring Ranges Multiple standard ranges (e.g., 3-15 psig, 6-30 psig, etc.) to provide the required thrust for the application. Accessories Positioners: DVC6200 (Digital), 3582i (Pneumatic) Limit Switches, Solenoid Valves, Air Sets, Fail-Safe Kits (for loss of air supply).