Civil defense sealed valves are used in the ventilation protection systems of civil defense projects during wartime, among the three types of conversion ventilation methods. They can alter the air flow, and are suitable for air ventilation and exhaust pipelines. The nominal pressure of civil defense sealed valves is generallyPN≤0.1MPa, Operating temperature is generally- 30～+40℃Relative humidity is generally:30～90In piping systems with air as the medium, it is an institution serving as a unidirectional closed circuit. Currently, it is divided into...AvailableManualAndManual ElectricTwo types, when installing sealed valves, pay attention to the medium flow direction.Shockwave Direction) Should match the marking on the valve bodyArrow directionUniform. Generally, it aligns with the direction of the air intake system and is opposite to the exhaust system's direction.Manual and hand/electric closure valves both possess a certain ability to withstand the residual pressure of shock waves.。