One minute understanding of what an airtight valve is

　　Airtight valveMainly used for isolating partitions in air conditioning and ventilation systems. High airtightness, able to meet the safety requirements of special occasions. Even in the event of a power outage, air tightness can be ensured. The sealing level is formulated according to KTA3601 and DIN25414, which fully complies with the operating regulations of nuclear power plants (pressure difference of 2000Pa, leakage rate of 0.01m3/h * m2).

　　Airtight valves mainly consist of valve bodies, blades, bearings, seals, actuators, etc., of course, the main material of these components is stainless steel. The valve body is fully welded to ensure air tightness. The blade is made of two layers of stainless steel and one layer of stainless steel. The airtight valve is composed of sealing gaskets, ensuring both strength and airtightness. But everyone should be careful not to use it alone. Mainly used in conjunction with some purification equipment, it adopts a flange design with bolt holes for connection with purification equipment. To meet the on-site needs, airtight valves are designed on both sides.

   The airtight valve complies with the standard BS1449-304class-S112B. The maximum allowable back pressure of the valve is 5000Pa. The sealing material is chloroprene rubber foam rubber, which can withstand high temperatures up to 80 degrees Celsius. When using, it is also necessary to ensure air tightness. The connection between the blades and bearings adopts a dual method of bolts and welding. The interior of the valve body adopts a circular arc surface, which has better sealing performance with the blades, is not easy to stick dust, and is easier to clean. Moreover, the actuator is a mechanism that controls the opening and closing of the airtight valve. This allows for a 90 degree opening and closing motion of the blades. The valve body is equipped with blade stops to prevent excessive blade opening from affecting air tightness. In short, the sealed valve has good sealing performance and can meet the requirements of zero leakage in special occasions. It is a commonly used equipment in biosafety laboratories. Its main function is to block the airflow of ventilation ducts, isolate filters and contaminated components, and protect the safety of personnel and the environment.

   Airtight valves are widely used in various industries, therefore they must be widely used. In fact, this airtight valve is a ball valve equipped with a pneumatic actuator, which greatly saves manpower and time. It also has the function of rotating by 90 degrees. The difference is that the valve body of a plug valve is a sphere with a circular through hole or channel on its axis. In fact, airtight valves have many advantages when used, such as low fluid resistance and a resistance coefficient comparable to pipe sections of the same length. Now the structure is simple, small in size, and lightweight. It has a compact and reliable structure. At present, sealing surface materials are mostly made of plastic, which has good sealing performance and is widely used in vacuum systems. Overall, the operation is simple and the opening and closing are fast. From fully open to fully closed, it only needs to be rotated 90 ° for easy remote control. Convenient maintenance, simple structure, generally movable sealing ring, easy disassembly and replacement.