Technical Specifications / Parameters Parameter Specification / Description Model Series Fisher HP (e.g., HP, HPT, HPB - specific design variants) Type Top-Entry, Unbalanced or Balanced, Cage-Guided Globe Valve Size & Pressure Class Sizes: 1" through 8" (DN25 through DN200) Pressure Class: ANSI Class 900, 1500, 2500, 4500. End Connections Flanged (RF or RTJ), Butt-Weld. Body Materials Forged Carbon Steel (A105), Forged Stainless Steel (F316), Alloy Steels (F22, F91). Trim Materials Standard Trim: 17-4PH Stainless Steel (hardened). Severe Service Trim: Stellite (on plug and seat), 440C Stainless Steel, Tungsten Carbide. Temperature Range Standard: -50°F to +1000°F (-46°C to +538°C). Special designs for cryogenic or higher temperatures. Flow Characteristics Modified linear, equal percentage, or quick open, determined by the cage profile. Leakage Class Standard (Metal Seat): ANSI/FCI 70-2 Class IV. Soft Seat Option: ANSI/FCI 70-2 Class VI. Noise & Cavitation Control Cavitrol® Trim: Multi-stage anti-cavitation trim (Cavitrol II, III, Hex) is available. Whisper Trim®: Advanced noise attenuation cages are available for high-noise duties. Flow Capacity (Cv) Varies significantly by size, trim, and pressure class. Ranges from low Cv (for small sizes with reduced trim) to very high Cv (for large sizes).