Emerson Alco 064290 Expansion Valve

The Emerson Alco 064290 Expansion Valve is a balanced port TXV designed for precision superheat control in refrigeration and heat pump applications. Engineered for systems utilizing R404A, R507, or R502 refrigerants, this 1.5 ton thermostatic expansion valve features a straight-through body with 3/8" x 1/2" ODF sweat connections. The low temperature SZ charge is specifically calibrated for evaporator temperatures ranging from -50°F to +10°F, making it a reliable choice for commercial walk-in freezers and low-temp cases. With a 5-foot capillary tube and externally equalized design, the HFES 1 1/2 SZ ensures accurate refrigerant flow even in systems with high pressure drops across the evaporator. The stainless steel power assembly provides superior corrosion resistance, while the 450 psig maximum working pressure makes it a robust HVAC replacement part for demanding environments. Contractors can rely on the Alco HFES series for consistent performance and simplified refrigeration system diagnostics during installation or service calls.

• Balanced Port Design: Compensates for changes in head pressure, providing stable superheat control across varying ambient conditions.
• Low Temp SZ Charge: Optimized for R404A refrigeration systems operating in deep-freeze applications.
• Corrosion Resistance: Features a durable stainless steel replaceable power assembly to prevent premature valve failure.
• External Equalization: Ensures precise evaporator pressure sensing, critical for maintaining efficiency in 1.5 ton systems.
• Sweat ODF Connections: Facilitates a secure, leak-free HVAC installation with standard 3/8" inlet and 1/2" outlet sizing.

Is the HFES 1 1/2 SZ compatible with R448A or R449A?
Yes, the SZ charge code is recommended by Emerson for both R404A/R507 and newer R448A/R449A retrofit applications, though capacity adjustments should be verified for the specific refrigerant.

What is the benefit of the external equalizer on this model?
The externally equalized expansion valve is required for evaporators with high pressure drops or distributors to ensure the valve responds to the actual pressure at the evaporator outlet rather than the inlet.

Can this valve be used in a bi-directional heat pump system?
The HFES series TXV offers bi-directional capability in specific tonnage ranges; however, always confirm the flow direction and internal check valve requirements for your specific heat pump circuit.

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.