Y-pattern valves having an integral orifice plate tend towards equal percentage
performance. The ‘Microset’ handwheel indicates the final valve setting. The
relationship between pressure drop and flow is not altered by the handwheel
setting. DN -1 0 valves operate from close to fully open with complete turns
of the handwheel, 1 turns for DN 00/DN 0 and 1 turns for DN 00 . The digit in
the outer tenths of a turn.