The relief or safety valves of this category are the most used in the plants and production’s lines, where fluids or gas pass through, both in the food sector, and in the chemical-pharmaceutical one. Their function is to control the fluids’ transit, protecting them from the possible over-pressure or depression, which could damage the plant or modify the product that flows within it. If needed, these valves can be tared and certified according to PED standards or other agencies.