While this board is specifically optimized for two-stage gas furnaces like the MG2S

This orifice is specifically engineered for the TUA and TUAE stainless steel expansion valves

the PG9 adapter is utilized for specific pilot burner brackets that require a larger mounting diameter

the differential pressure switch design allows for monitoring the pressure drop across a component or the difference between a duct and atmospheric pressure

This is the aftermarket dual probe assembly designed to fit into the existing boiler manifold

Schneider Electric (Barber Colman) AV-93 Cam & Plunger 30067439-890 While this board is specificallyThe Schneider Electric (Barber Colman) AV 93 is a high performance Cam and Plunger linkage kit designed for field assembly with non spring return actuators and VB 7xxx series valves. This rugged hardware set is engineered to facilitate precise valve stroke management and reliable close off performance in demanding industrial and commercial HVAC systems. Specifically tailored for 1 1 2 to 2 inch globe valves, the kit includes precision machined cams, a