The size of the valves  is depend on the type of the valve.

Butterfly valve: from DN40 to DN3000,

Gate valve: from DN15 to DN1200,

Ball valve: from DN15 to DN1200,

Check valve: from DN15 to DN2000 (within different type)

Globe valve: from DN15 to DN300

Valves for steel plant: from DN15 to DN4000