Johnson Controls VG7441GS Valve 321142-301 the burner orifice may be

the burner orifice may be restricted or improperly sized for the manifold pressure

this model is technically identical to the 12-G27121-000-450 and maintains a precise +/-15°F tolerance

including the popular HD45 and HDS45 series

Because this unit features inherently limited overcurrent protection

Johnson Controls VG7441GS Valve 321142-301 the burner orifice may beThe Johnson Controls VG7441GS is a heavy duty 1 2 inch normally closed globe valve engineered for precise control in commercial HVACR systems. Built with a rugged cast bronze body and brass trim, this 2 way valve is designed to regulate the flow of hot water, chilled water, and 50 50 glycol solutions, as well as saturated steam up to 15 psig. With a 4. 6 Cv rating and an equal percentage flow characteristic, it ensures stable modulating control and