Nordyne 920670A TXV Valve

The Nordyne 920670A is an OEM thermal expansion valve (TXV) specifically engineered for 3-ton air conditioning and R410A heat pump systems. As the direct factory replacement for discontinued part number 669816, this externally equalized valve ensures precise refrigerant metering across various load conditions. For technicians performing a Nordyne 920670A TXV replacement, this component maintains the evaporator's superheat at optimal levels, preventing liquid slugging and protecting the compressor. The bolt-on design facilitates a direct fit within the liquid line assembly, making it a critical component for restoring system SEER ratings and HVAC cooling efficiency. When diagnosing refrigerant flow issues, utilizing this genuine Nordyne replacement part ensures the mechanical pressure sensing bulb and internal orifice match the original manufacturerÆs pressure-temperature curves. This R410A TXV valve is essential for maintaining the volumetric efficiency of 3-ton coils in Miller, Intertherm, and Nordyne-branded equipment.

Key Benefits

• Direct OEM Compatibility: Serves as the precise drop-in replacement for the 669816, eliminating the need for manifold or line set modifications.
• Optimized Superheat Control: Maintains consistent evaporator performance by accurately modulating refrigerant flow based on thermal load.
• System Longevity: Prevents excessive floodback and ensures the compressor operates within designated thermal parameters.
• R410A Optimized: Specifically calibrated for high-pressure R410A applications in residential split systems and packaged units.

Common Questions

Is the Nordyne 920670A compatible with older R22 systems?
No, this TXV is specifically calibrated for R410A refrigerant pressures and should not be used in R22 systems due to different pressure-temperature requirements.

Do I need to replace the liquid line drier when installing this TXV?
Yes, it is standard industry practice to replace the filter drier whenever the refrigerant circuit is opened to prevent moisture and debris from clogging the new valve orifice.

How do I verify if this valve is the correct fit for my 3-ton unit?
This valve is the designated replacement for part number 669816 and is sized for 36,000 BTU (3-ton) capacity. Check your unit's data plate and existing valve nomenclature for matching specifications.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.