2026-08-03
ISO 5211 defines the mechanical interface between part-turn actuators and industrial valves — covering F03 through F40 flange dimensions, bolt circle patterns, spigot tolerances, and square, flat, and keyed drive couplings. This technical guide provides complete dimension tables, torque recommendations by flange size, and a step-by-step method for matching pneumatic or electric actuators to ball valves, butterfly valves, and plug valves across global supply chains.
