The temperature safety relief valve limits the temperature of the water contained in the multifuel or non-pulverized solid fuel generators, equipped with an emergency heat exchanger or integrated storage. When reaching the setting value, the valve opens to: - make water pass through the emergency heat exchanger, withdrawing heat from the technical water contained in the boiler body; - discharge water from the integrated storage which is therefore replaced by new cold water, thus withdrawing heat from the technical water contained in the boiler body. Reference standards that require its application: - conformity to EN 14597 for use on non-pulverized solid fuel generators with power output lower than 100 kW; - use according to the indications provided by the system standards EN 12828, UNI 10412-2 and product standard EN 303-5; - INAIL collection "R" - ed. 2009 (Italian standard): chapter R.3.C. (paragraph 1, point 1.4), chapter R.3.C. (paragraph 2, point 2.1, letter i2), chapter R.3.C.(paragraph 3, point 3.1, letter i and point 3.3).