Working principle and application scenarios of airtight valves

　　Airtight valveIt is a typical component that isolates harmful pollutants from filters. To isolate the gas inside the container from contact with external air, or to introduce air under certain circumstances, it is equivalent to a switch for entering and exiting air in a laboratory or other container. Good airtightness, effectively isolating contaminated filters from workers, thereby protecting their safety. Its typical application is to isolate filters and contaminated components in bag in bag out filtration systems.

    The working principle of an airtight valve is that the actuator can control the opening and closing of the blades. When the airtight valve is connected to the bag inlet and outlet exhaust box, it is necessary to replace the high-efficiency filter inside the bag inlet and outlet box. Alternatively, a sealed valve is required for Xingqi gas disinfection. Its function at this time is to separate the bag in and bag out exhaust box from the ventilation pipeline, prevent gas from the pipeline from entering the bag in and out exhaust box, and ensure that the high-efficiency filter is replaced without exception and tied.

    When the airtight valve is connected to a regular ventilation pipe, the gas flow inside the ventilation pipe can be controlled by the opening and closing of the blades, which can divide the ventilation pipe into several sections. To achieve the effect of diverting gas in the pipeline.

    When airtight valves are used in critical areas of biosafety laboratories, zero leakage must be ensured. There is a national zero leakage standard here. Please refer to the national standard documents of the biosafety laboratory. When used in the air supply or exhaust section of a regular clean room, it only needs to meet the engineering requirements of low leakage or zero leakage under specific pressure. In short, when used on pipelines that do not involve hazardous gases, closed valves do not require special requirements to meet zero leakage.

    The airtight valve is used to isolate various zones in the air conditioning and ventilation system. They have high air tightness and can meet the safety requirements of special occasions. Even in the event of a power outage, its airtightness can be guaranteed, and the sealing level is determined according to KTA3601 and DIN25414.

    It is mainly used to change the ventilation mode and airflow, and is suitable for ventilation and exhaust ducts with air as the medium, such as civil air defense, national defense and civil industrial engineering. Aluminum alloy airtight valves have a certain ability to withstand shock wave residual pressure, and can be electric or manual. Generally speaking, when installing this product, it should be noted that the flow direction of the medium should be consistent with the arrow direction marked on the valve body. Now it mainly consists of valve body, valve disc, and transmission part; It is a one-way closed circuit mechanism suitable for pipelines with air as the medium. But it must also be noted that sealed valves are installed on horizontal or vertical pipelines; The installation direction and arrow direction of the sign should be consistent with the direction of the shock wave; The valve should be in a fully closed or fully closed state and cannot be adjusted.

When installing the airtight valve, ensure that the pressure direction arrow is consistent with the direction of the shock wave; The switch pointer should be adjusted to match the actual switch position of the valve plate; The inner cavity and sealing surface should be clean and free from contamination. Do not open or close the valve plate before cleaning. Note that the airtight valve can only be fully opened or fully closed and cannot replace the air volume regulating valve. It should be installed on a horizontal or vertical official road. Alternatively, when everyone is fully open, the local resistance coefficient is 0.24. Additionally, the pressure surface should be oriented towards the direction of the shock wave. The connecting flange and rubber gasket shall be processed according to the drawings.