Civilian Defense Airtight Valve

Our main products include fire-resistant high-temperature exhaust fans, axial fans, mixed-flow fans, roof fans, fan casings, positive-pressure supply fans, pressure supply fans, multi-blade supply outlets, pressure supply outlets, positive-pressure supply outlets, fire protection dampers, fire regulating valves, smoke exhaust valves, smoke and fire exhaust valves, multi-blade smoke outlets, plate-type smoke outlets, air handling units, modular air conditioners, air-to-air exchangers, aluminum alloy air outlets, water tanks, cooling towers, and other air conditioning accessories, as well as air conditioning fire protection products.