Nordyne 664057R Restrictor

The Nordyne 664057R Restrictor is a critical fixed-orifice metering component engineered for precise refrigerant flow regulation in residential HVAC systems. Featuring a calibrated .57 orifice size, this OEM replacement piston is designed specifically for Nortek, Miller, and Intertherm evaporator coils and heat pump systems. By maintaining a constant metered flow, this restrictor ensures optimal pressure drops across the liquid line, preventing liquid slugging and maximizing heat transfer efficiency within the N-Series heat pump and AC circuits.

For technicians performing a Nordyne 664057R replacement, this component offers a direct-fit solution to restore factory-spec superheat and subcooling levels. The 664057R 0.57-inch restrictor is compatible with various refrigerant profiles, including R-410A applications, provided the system matches the .057 internal diameter requirements. Utilizing genuine Nortek HVAC parts like this restrictor ensures that the system avoids the capacity loss often associated with generic, off-spec metering devices.

Key Benefits:

• Precise Refrigerant Metering: Engineered with a .57 restrictor orifice to maintain exact refrigerant saturation temperatures.
• OEM Compatibility: Direct replacement for Nordyne 664057R, fitting Nortek Global HVAC, Miller, and Intertherm equipment.
• System Efficiency: Prevents compressor strain by ensuring the correct metered flow into the evaporator coil.
• Durable Construction: Manufactured from high-quality alloy to resist internal corrosion and debris buildup.

Common Questions:

How do I confirm the 664057R is the correct size for my unit?
Always verify the required piston size on the outdoor unit’s data plate or the indoor coil's specification sheet. This .57 restrictor is specific to certain tonnage and SEER ratings common in N-Series heat pump configurations.

Can this restrictor be used with R-410A?
Yes, as long as the system's technical manual calls for a 664057R 0.57-inch restrictor for the specific capacity and line-set length being serviced.

Does this part replace a TXV?
No, this is a fixed-orifice piston. If your coil is currently equipped with a thermal expansion valve, this part is not a direct substitute without removing the TXV and re-plumbing for a piston distribution manifold.

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.