Technical Parameters Parameter Specification Model / Technology Fisher DMA (Metal) Fisher AF (Fluoropolymer-Coated) Type Multi-Stage Anti-Cavitation & Noise Attenuation Trim Primary Function Cavitation Control & Noise Reduction Corrosion Resistance & Cavitation Control Trim Construction Stacked metal plates/disks with micro-perforations. Metal core with a thick, inert fluoropolymer coating (e.g., PTFE, PFA). Wetted Materials Stainless Steel (Standard), other alloys like Hastelloy®. Carbon Steel or Stainless Steel core with PTFE or similar Fluoropolymer coating. Pressure Drop Capability Capable of handling very high pressure drops (ΔP), often in excess of 1000 psi. Noise Reduction Can achieve up to 15-20 dBA or more of noise attenuation. Compatible Valve Bodies Fisher easy-e® (e.g., 1077, 1098), V500, V100, V200, and others. Size Range Designed to fit valve sizes from 1" to 12" (DN 25 to DN 300) and larger. Temperature Limits Depends on material, but standard metal DMA can handle up to 800°F (427°C) or more. Limited by the polymer, typically up to 400°F (204°C) for PTFE. Standards Compliant with NACE MR0175/ISO 15156 for sour service (material dependent).