Boiler safety of pneumatic valve, the function and selection consideration

pneumatic boiler safety valve is used in boiler and pressure vessel special pneumatic valves. Boiler safety is pneumatic valve of overpressure in the boiler and pressure vessel. When the pressure inside the boiler and pressure vessel to the rated value, the boiler safety pneumatic valve opening pressure, When the pressure inside the equipment back to normal working pressure, safety pneumatic valve closed back to the spring return pneumatic valve, effectively guarantee the boiler and pressure vessel safety equipment. Pneumatic boiler safety valve is belong to special equipment, need to be considered in selection of equipment, process condition and state of medium etc, its security model selection of the pneumatic valve technical personnel advice should consider the following factors.
　　( Safety, on the choice of pneumatic valve structure mainly depends on the equipment of process conditions and the characteristics of working medium. In general, most of boiler, pressure vessel use spring loaded safety pneumatic valve. For toxic, flammable and explosive medium, choose security pneumatic valve closed. Boiler and pressure vessel and safety valve in large volumes and wall thickness and the small, low pressure container, had better choose all rev pneumatic valve type safety.
　　( Pneumatic valve safe working pressure range of boiler and pressure vessel should be considered the maximum allowable working pressure.
　　( Safety of pneumatic valve capacity must be greater than the equipment safety relief measures, to ensure that the overpressure, boiler and pressure vessel safety pneumatic valve open timely discharge part of the medium, to avoid the pressure inside the device continues to rise.
　　( Pneumatic valves for boiler safety, its total emissions must be greater than the boiler continuous maximum evaporation, and on the drum and superheater all safe after pneumatic valve open, inside the drum steam pressure shall not exceed the design pressure. Times.