the 2PNO (2-Pole

Engineered for Trane 2-way and 3-way valves

provided the fittings and electrical requirements match

always ensure the system is flushed and that only compatible polyester oil is used to maintain lubricant integrity with HFC refrigerants

because this is a hard shutoff thermal expansion valve

Armstrong Fluid Technology 216942-300 Valve 319825-402 the 2PNO (2-PoleThe Armstrong Fluid Technology 216942 300 Valve is a precision engineered 1 2" NPT Brass Hot Water Pressure Relief Valve designed for high performance hydronic heating systems. Factory set at a 30 PSI relief pressure, this RL 11 relief valve serves as a critical safety component by automatically discharging excess pressure to protect boilers and downstream piping from structural damage. Constructed from high grade, corrosion resistant brass, it