Emerson Alco 057432 Power Assembly

The Emerson Alco 057432 is a high-performance XB-1019FW551B power assembly designed for the "T" series take-apart thermostatic expansion valves. This field-proven refrigeration power element is engineered specifically for R12 refrigerant systems, providing the critical driving force required to actuate the TXV's internal needle and seat. With a 55 PSI MOP (Maximum Operating Pressure) charge, it protects the compressor motor from overloading during high suction pressure events, ensuring system stability in low-temperature and medium-temperature applications. The 5-foot capillary tube offers ample length for remote bulb mounting, while the 1/4" SAE flare equalizer connection simplifies integration into your existing liquid line setup.

Built for the rigors of the field, this stainless steel power assembly features a large-diameter diaphragm that generates high-level closing forces, resulting in superior superheat control even under partial load conditions. The -50°F to +50°F application temperature range makes it a versatile choice for a wide array of commercial refrigeration tasks. Because it is part of the modular Alco T-Series, you can swap this replacement TXV power head by removing the two included capscrews, allowing for rapid servicing without breaking line connections or recovering the entire system charge.

• Precise Superheat Control: Large diaphragm area provides steady TXV modulation and minimizes hunting.
• Compressor Protection: Integrated 55 PSI MOP prevents high suction pressure from damaging the motor during pull-down.
• Modular Maintenance: Take-apart design allows for the replacement of the 057432 power assembly using only the included capscrews.
• Durable Construction: Stainless steel power element resists corrosion and fatigue in harsh HVACR environments.
• Wide Thermal Range: Reliable performance across a 100-degree operating window (-50°F to +50°F).

Common Questions from Contractors:

Does this assembly include the mounting bolts?
Yes, the Emerson 057432 comes with the necessary capscrews for secure attachment to the T-series valve body.

Can I use this with R134a since R12 is discontinued?
While the XB-1019FW551B is specifically charged for R12 refrigerant, technicians often use it in legacy systems or specific retrofit scenarios. Always verify pressure-temp curves to ensure compatibility with your specific refrigerant alternative.

What is the purpose of the 1/4" SAE connection?
This is the external equalizer port, which allows the power assembly to sense pressure at the evaporator outlet rather than the valve outlet, compensating for pressure drops across the coil.

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.