Replacing a failed expansion valve requires a component designed for exact refrigerant metering and long-term reliability

and 143-80-2HP regulator bodies

This board is the standard replacement for most M1M and M1G series units

Is this a direct replacement for the 621839R

Optimized Performance: Precise 0

Belimo G340B-N Valve 319847-401 Replacing a failed expansion valveThe Belimo G340B N is a high performance 1 1 2 inch 3 way globe valve designed for demanding HVACR hydronic applications. Featuring a robust bronze body with brass trim and a stainless steel stem, this NPT threaded valve is engineered to manage chilled water, hot water, and up to 60% glycol solutions. With a 28 Cv rating and a linear flow characteristic for B AB ports, it provides precise mixing and diverting control. This component is ANSI Class 250