2-Way Ball Valve Threaded - Type FS2 | ADLER Adler Ball Valve Threaded - Type FS2 | ADLER The Ball Valve Threaded - FS2 by ADLER is a high-performance, two-piece full bore valve designed for robust industrial applications. Constructed from round steel bar, it adheres to multiple international standards including EN 12516-2, ISO 14313, and ASME B16.34. Available in sizes ranging from DN ¼” to DN 3”, the valve is offered in carbon steel with a... View