Equipped with advanced production and processing equipment, customized valve bodies are available upon request. Optional body materials include galvanized sheet, carbon steel, 201 stainless steel and 304 stainless steel. Multiple connection processes such as non‑destructive riveting and bolted connection are selectable. Fitted with a lockable manual adjusting handle, it can be locked at any air‑volume opening position for flexible air‑volume and air‑pressure regulation. Thickened and reinforced blades resist wind pressure and are not easy to deform. Easy to install and maintenance‑free in later service.

Suitable for working conditions with low‑leakage requirements, featuring double‑layer composite blades. Optional 220V / 24V electric actuators with on‑off or analog signals are available for multiple operating scenarios. Built‑in position feedback allows integration with complete building automation systems. It is a universal model for fresh‑air projects in shopping malls, office buildings and hospitals.

Equipped with advanced production and processing equipment, it supports customized valve bodies as required. Multiple processes including non‑destructive riveting and bolted connection are available, compatible with most fresh‑air and central‑air‑conditioning ducts. Optional 220V / 24V electric actuators with on‑off or analog signal are offered for diverse working conditions. Built‑in position feedback enables integration with complete building automation systems. A universal solution for fresh‑air projects in shopping malls, office buildings and hospitals.

The whole unit is made of 304 stainless steel, acid‑alkali resistant and moisture‑corrosion resistant. It resists rust and deformation under long‑term service in humid chemical environments. Non‑spark valve‑body material, optional explosion‑proof grades: Gas‑explosion proof BT‑4, Dust‑explosion proof CT‑6. Available types: explosion‑proof fire damper, explosion‑proof electric damper, explosion‑proof check damper, explosion‑proof regulating damper. Effectively blocks reverse backflow of flammable gas and dust to eliminate pipeline explosion risks. Thickened pressure‑resistant valve body with tight sealing, integrating ventilation and explosion‑proof isolation functions. Safety standard equipment for chemical plants, hazardous‑material warehouses and explosion‑proof laboratories, greatly improving ventilation safety level of projects.

The whole unit is made of 304 stainless steel, acid‑alkali resistant and moisture‑corrosion resistant. It resists rust and deformation under long‑term service in humid chemical environments. Non‑spark valve‑body material, optional explosion‑proof grades: Gas‑explosion proof BT‑4, Dust‑explosion proof CT‑6. Available types: explosion‑proof fire damper, explosion‑proof electric damper, explosion‑proof check damper, explosion‑proof regulating damper. Effectively blocks reverse backflow of flammable gas and dust to eliminate pipeline explosion risks. Thickened pressure‑resistant valve body with tight sealing, integrating ventilation and explosion‑proof isolation functions. Safety standard equipment for chemical plants, hazardous‑material warehouses and explosion‑proof laboratories, greatly improving ventilation safety level of projects.