Throttle valve for installation between flanges DIN EN 1092-1, PN10 (DN80- N150:PN10/16) One-piece body with centering lugs, end-to-end stem, flat disc design with excellent flow characteristics Face-to-face dimension: DIN EN 558-1, line 20(DIN3202-K1)Connection: DIN 3337 – ISO 5211.