Emerson Alco 057372 Powerhead

The Emerson Alco 057372 XC-726MW552B is a high-performance thermostatic expansion valve powerhead designed for precise refrigerant metering in R134a refrigeration systems. This XC-726MW552B power assembly features a 10-foot capillary tube and a 1/4" SAE flare equalizer connection, making it high-performance for a variety of commercial refrigeration parts applications. Engineered for an operational range of -50°F to +50°F, this unit includes a 55 PSI maximum operating pressure (MOP) charge to prevent compressor overload during high-load start-ups. As a veteran-grade HVAC expansion valve replacement, the modular design allows for rapid field installation. The Alco Controls powerhead 057372 ensures stable superheat control and reliable TXV power element performance, maintaining system efficiency under varying load conditions. Each thermal expansion valve part kit comes complete with the necessary capscrews for a secure fit to the valve body.

• Optimized Pressure Control: Integrated 55 PSI MOP prevents suction pressure from exceeding safe limits during pull-down.
• Extreme Temperature Versatility: Certified for a broad application range from -50°F to +50°F for medium and low-temp duty.
• Durable Construction: Heavy-duty 10-foot capillary tube provides flexible sensing bulb placement in complex evaporator layouts.
• Precision Metering: Designed specifically for R134a to ensure accurate superheat adjustment and prevent liquid slugging.
• Simplified Serviceability: Take-apart design with included capscrews facilitates quick powerhead swaps without de-brazing the entire valve.

Common Questions

Is the XC-726MW552B compatible with other refrigerants?
This specific power assembly is factory-charged and calibrated exclusively for R134a systems to ensure proper pressure-temperature response. Using it with unapproved refrigerants will lead to inaccurate superheat control.

What is the benefit of the 55 PSI MOP feature?
The Maximum Operating Pressure (MOP) charge limits the pressure exerted on the diaphragm, which protects the compressor motor from drawing excessive current during high-temperature start-up or after a defrost cycle.

Does this powerhead include the valve body?
No, this is a replacement power assembly (powerhead) only. It is intended to be mounted onto existing Alco XC series valve bodies using the provided capscrews.

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.