Armstrong International D41790 Air Vent Els PW 17895 technicians often identify this part

technicians often identify this part as the primary failsafe that interrupts power to the gas valve when plenum temperatures exceed safe operating parameters

Can this motor be used in 50Hz applications

Steam Rated Design: Robust internal components suitable for low-pressure steam applications and high-temperature water

The integral vent limiting orifice eliminates the need for external vent piping in most jurisdictions

Does this replacement include the mounting hardware or trim disc

Armstrong International D41790 Air Vent Els PW 17895 technicians often identify this partThe Armstrong International D41790, also identified as the AV 13 brass air vent, is a specialized automatic air vent designed for hydronic heating systems and hot water service. Featuring a dual connection design with 1 2" female NPT and 3 4" male NPT ports, this float actuated valve effectively manages air binding by purging accumulated air during system operation. Constructed from high grade brass, the unit is rated for operating pressures up to 150