Lennox 12L35 Heater Assembly R-410A Where is this gasket used

Where is this gasket used in the valve assembly

The fail-safe spring return mechanism automatically retracts the actuator shaft upon a loss of control air pressure

For specific chemical compatibility with the brass body and Buna-N O-ring

Model Number before attempting cross-brand installation

Lennox 12L35 Heater Assembly R-410A Where is this gasket usedThe Lennox 12L35 Heater Assembly is a high performance 5kW electric heat kit designed for seamless integration into compatible Lennox residential air handlers. Operating on a 240V, 1 phase, 60Hz electrical configuration, this OEM component provides reliable supplemental or primary heating in heat pump or electric only applications. As a veteran preferred HVAC replacement part, it ensures precise thermal output through high grade resistive heating