When using nitrogen in repairing a sealed refrigeration system the nitrogen tank should always be equipped with?

When using nitrogen in repairing a sealed refrigeration system, the nitrogen tank should always be equipped with a pressure regulator and a suitable pressure relief valve. These components ensure that the nitrogen is delivered at a safe and controlled pressure, preventing over-pressurization of the system. Additionally, using a nitrogen flow meter can help regulate the flow rate during the process. Proper safety equipment and practices should also be followed to ensure safe handling of nitrogen.