The DL SERVICE set includes 2 safety valves for Lagostina cookware. With this replacement part you will have a better functioning of your cookware, as well as a longer service life. Valves are essential to prevent pressure from exceeding the safety level. The spare parts are spring loaded and open automatically when the pressure goes beyond the permissible threshold. The maintenance and continuous monitoring of the pot valves are powerless in order to ensure good operation over time. Once the safety valve has released the pressure, it is important to unlock or replace it before using the pressure cooker again. This ensures the correct functioning of the safety valve.