Stainless Steel 201 Manual Air Damper Check Valve Ventilation Duct Vent With Handle Diameter 80mm/100mm/125mm/150mm

High-concerned chemical : None NC or NO : Normally Closed Actuator Mode : With Manual And Instruction Structure : Shutoff Port Size : 80/100/125/150mm Media : Gas Material : Plastic Temperature of Media : Normal Temperature Power : Manual Standard or Nonstandard : Standard Pressure : Low Pressure Model Number : Manual Air Damper Valve Is Smart Device : no Origin : Mainland China Power Source : Ac