The Venturi air volume control valve has changed the air volume control mode, making the air volume control more stable and accurate, and the valve is independent of pressure. It can respond exceptionally quickly to pressure fluctuations in the air duct and ensure the stability of the air volume con
The air volume control valve has a basic structure: to place a (baffle plate) in the center of the air duct. The valve plate can rotate around an intermediate shaft parallel to the valve plate. Become an electric multi-leaf air volume control valve. Air volume control valves are generally divided in
1. How severe is air pollution in American history?When it comes to the history of air pollution or smog in the United States, many people may think that it started with the 1943 Los Angeles smog incident: on July 26, 1943, smog swept the urban area of Los Angeles along with a heatwave, with less th
