By isolating moving components from the ductwork

Reversible Rotation: Field-selectable clockwise or counterclockwise operation via simple jumper adjustment ensures compatibility with any damper configuration

ensuring safe burner startup sequences in residential and commercial heating applications

also identified as the XB-1019MC1B

Armstrong International C3510-3 Vent THPU32HP7Y By isolating moving components fromThe Armstrong International C3510 3, also identified as the Model 11AV 3 4 178, is a high performance stainless steel air and gas vent designed for reliable fluid management in demanding HVACR and industrial environments. Featuring a 3 4" NPT inlet and a 1 2" NPT outlet, this free floating lever vent provides positive venting of air and non condensable gases under pressure. Its all stainless steel construction ensures superior corrosion resistance,