Why Does The Sanitary Butterfly Valve Need To Be Annealed?

Sanitary Butterfly Valve Why annealing?

In the production process of ferritic stainless steel sanitary butterfly valves, in order to meet the requirements of cold rolling, a key and expensive process is annealing after hot rolling. The traditional process route is to anneal the hot-rolled strip in a bell furnace. The entire annealing cycle is long and the energy consumption is very high.

In order to reduce energy consumption, reduce production costs, improve product competitiveness, and meet the requirements of cold rolling for sanitary butterfly valves, based on the characteristics of large-scale production of ferritic stainless steel, of which about 20% is 430 ferritic stainless steel, after years of research and testing, a new process has been developed that consumes less energy and time than the bell furnace annealing process, is cost-competitive and can meet the requirements of cold-rolled sanitary butterfly valves, namely the direct annealing process. The basic principle of this process is to use the residual heat after hot rolling to immediately anneal.