this 30731050-001 stem assembly is designed for direct compatibility with single-seated globe valves

as well as specific Hartland HCT configurations

maintaining the mechanical integrity of the original installation

ensuring full travel and positive closure

high-tension connection that withstands the harsh environment of a burner vestibule

Lochinvar & A.O. Smith 100170643 Board 318423-701 this 30731050-001 stem assembly isThe Lochinvar & A. O. Smith 100170643 Thermostat Control Board is a critical OEM replacement part engineered for high efficiency CB 045 260 hydronic boilers. As a dual stage integrated boiler control, this module manages complex heating cycles by monitoring real time system activity and adjusting firing rates to meet precise demand. It features a broad max setpoint range of 150F to 200F and a reliable min setpoint range of 110F to 140F, ensuring