What is the main purpose of using a safety valve in a steam boiler?

As a thermal energy equipment widely used in industrial production and daily life, the safety and stability of steam boilers are of vital importance. As a key component of the boiler safety protection system, the safety valve bears the important responsibility of ensuring that the boiler operates safely within the allowable working pressure range.
A safety valve is a special valve. Its design principle is that when the steam pressure in the boiler exceeds the preset safety value, the valve will automatically open to release excess steam, thereby reducing the pressure in the boiler. This process is automatic and rapid, without manual intervention. When the boiler pressure drops below the safety value, the safety valve will automatically close to ensure that the boiler can continue to operate stably.
During the operation of the steam boiler, the pressure in the boiler will continue to rise due to factors such as fuel combustion and water evaporation. If the pressure is too high, it will not only cause excessive stress on the metal material of the boiler, but may also cause serious consequences such as leakage, deformation, and even explosion of the boiler. The existence of the safety valve is to ensure that the pressure in the boiler is always kept within the safety value range, thereby avoiding these potential dangers.
During the operation of the steam boiler, the pressure in the boiler may suddenly rise due to operator errors, equipment failures, or external factors. At this time, if the safety valve cannot be opened in time to release excess steam, the boiler may have an overpressure accident. The timely opening of the safety valve can effectively reduce the pressure in the boiler and prevent the occurrence of overpressure accidents.
In addition to automatically opening to release steam, the safety valve also has the function of sounding an alarm. When the boiler pressure exceeds the specified value, the safety valve will issue an obvious sound alarm to remind the operator to pay attention to the operating status of the boiler. In this way, the operator can take timely measures to reduce the boiler pressure and avoid further deterioration of the situation.
When the boiler pressure drops to the allowable value, the safety valve will automatically close again. This function ensures that the boiler can operate stably within the allowable working pressure range and avoids damage to the boiler caused by excessive pressure fluctuations. At the same time, it also ensures the energy efficiency and stability of the boiler and improves the operating efficiency and service life of the boiler.