What are the three main safety accessories of a boiler?

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The main safety accessories on a boiler are: a pressure gauge, a safety valve, and a water level gauge. Since these three types of accessories help boiler operators to closely monitor and control the water level, and are directly related to the safe operation of the boiler, they are known as boiler safety accessories. I. Pressure gauge: A pressure gauge is used to measure the pressure inside a boiler while it is in operation. With a pressure gauge, staff can operate the boiler correctly to ensure its safe operation. Users should note that each boiler must be equipped with a pressure gauge directly connected to the steam space of the boiler drum ； Boiler pressure gauges with different working pressures have varying degrees of accuracy ； Select an appropriate pressure gauge based on the operating pressure of the boiler ； The installation location should be easy to observe and clean, and protected from radiant heat, freezing, and vibration ； Below the pressure gauge there should be a tee valve and a trap ； The installation, inspection, and maintenance must comply with the regulations of the **metrology department; it should be calibrated at least once every six months, and after calibration it must be sealed with a lead seal. II. Safety Valve: The safety valve can automatically prevent the steam pressure in the boiler from exceeding the predetermined allowable range, thereby ensuring the safe operation of the boiler. When the pressure inside the boiler reaches the specified limit, the safety valve opens automatically to release steam and issue an alarm, alerting the operators to take action. Once the safety valve opens, it allows enough steam to escape, thereby reducing the pressure inside the boiler until it drops to a level lower than that when the valve first opened; at that point, the valve closes automatically. In this way, the pressure in the boiler is kept within safe limits, preventing explosion accidents. III. Water level gauge The water level gauge is an important safety device used to monitor the water level inside the boiler drum. The water level shown on the water level gauge indicates the water level of the water in the boiler drum. The stokers carry out the proper operations in this manner to ensure the safe operation of the boiler. Users should note that each boiler must be equipped with at least two independent water level gauges to ensure that the water level can be monitored in case of a failure ； Install in a location where it is easy to observe ； There should be clear markings indicating the high and low safe water levels ； Statements such as the water connection pipes should be installed horizontally to prevent the formation of false water levels