In metallurgical steel plants, electro-hydraulic servo valves are mainly used for the following purposes: 

1.Conticaster: Electro-hydraulic servo valves are extensively used in the hydraulic systems of conticasters to control the actions of the crystallizer, billet cutter, roller table, and other equipment to enable continuous forming and cutting of the billet.

2.Rolling Mill: The rolling mill’s hydraulic system utilizes electro-hydraulic servo valves to regulate the rolling gap and control the roll forming process, allowing for the processing of billets.

3.Cold-rolling Mill: The hydraulic system of the cold-rolling mill uses electro-hydraulic servo valves to control the opening and closing of the mill’s rollers, adjust the rolling gap, and control the tension, allowing for the processing of cold-rolled steel sheets.

4.Hot-rolling Mill: The hydraulic system of the hot-rolling mill uses electro-hydraulic servo valves to control the opening and closing of the mill’s rollers, adjust the rolling gap, and facilitate the roll forming process, allowing for the processing of hot-rolled steel billets. 

In conclusion, electro-hydraulic servo valves are extensively used in metallurgical steel mills to control the hydraulic systems of conticasters, rolling mills, cold-rolling mills, hot-rolling mills, and other equipment, which will improve the production efficiency and processing quality of steel production equipment.