“Stabilizer” of steam generator – safety valve

Each steam generator should be equipped with at least 2 safety valves with sufficient displacement. The safety valve is an opening and closing part that is in a normally closed state under the action of external force. When the medium pressure in the equipment or pipeline rises above the specified value, the safety valve passes through A special valve that discharges the medium out of the system to prevent the pressure of the medium in the pipeline or equipment from exceeding a specified value.

Safety valves are automatic valves and are mainly used in boilers, steam generators, pressure vessels and pipelines to control the pressure not to exceed the specified value. As an integral part of steam boilers, safety valves have strict requirements for installation. This is also to ensure that the steam The basis for the normal operation of the generator.

According to the structure of the safety valve, it is divided into heavy hammer lever safety valve, spring micro-lift safety valve and pulse safety valve. On the basis of complying with the safety valve installation requirements, pay attention to details to avoid adverse effects on the operation process. .

First, the installation position of the safety valve is generally installed on the top of the steam generator, but it must not be equipped with outlet pipes and valves for taking steam. If it is a lever-type safety valve, it must be equipped with a device to prevent the weight from moving by itself and a guide to limit the deviation of the lever.

Second, the number of safety valves installed. For steam generators with an evaporation capacity >0.5t/h, at least two safety valves should be installed; for steam generators with a rated evaporation capacity ≤0.5t/h, at least one safety valve should be installed. In addition, the specifications of the steam generator safety valve are directly related to the working efficiency of the steam generator. If the rated steam pressure of the steam generator is ≤3.82MPa, the orifice diameter of the safety valve should not be <25mm; and for boilers with rated steam pressure >3.82MPa, the orifice diameter of the safety valve should not be <20mm.

In addition, the safety valve is generally equipped with an exhaust pipe, and the exhaust pipe is directed to a safe location, while leaving enough cross-sectional area to ensure smooth flow of exhaust steam and give full play to the role of the safety valve. The function of the steam generator safety valve: to ensure that the steam generator does not operate in an overpressure state. That is, during the operation of the steam generator, if the pressure exceeds the limited working pressure, the safety valve will trip to reduce the steam generator through exhaust. The function of pressure prevents steam generator explosion and other accidents due to overpressure.

Nobeth steam generators use high-quality safety valves with excellent quality, scientific structural design, reasonable location installation, fine workmanship, and strict operation in accordance with standards. It has been tested many times before leaving the factory to ensure the safety factor of the steam generator, because it is a vital life-saving line for the steam generator and also a life-saving line for personal safety.