DOMELIFE HVAC Duct Manual Volume Backdraft Damper Airflow Ducting Branch Vent Damper with Sealed Rubber Gasket Air Control Valve Adjustment Handle Stainless Steel for HVAC Vent Systems 4in

Quality Materials The body is made from stainless steel material and the flap blade is made from aluminum With high hardness is not easy to deformation and corrosion can be used for a long time NEW DESIGN Unlike other products in order to prevent air leakage and improve the efficiency of the HVAC system we have added rubber rings at both ends of the channel to make the plugging more airtight and provide good airtightness Easy to install you just need to pull it into the desired ventilation duct and secure it with pipe or tape to complete the operation Valve blade silicone seal provides a good airtight seal and prevents leakage when the duct valve is closed In addition this design ensures that the flap operates smoothly and silently when opened or closed Manual Airflow Balance Adjustment The manual handle on the valve regulates airflow from multiple angles This helps control room temperature and stops reverse airflow It is also important that the damper sleeve be mounted so that the control handle is easily accessible Applications Widely used in the HVAC industryAfter installed in the HVAC system you can easily control the airflow rate or close the ventilation ducts when needed which will improve the energy efficiency of the system to some extent.