Emerson Alco 034803 Power Assembly

The Emerson Alco 034803 (Model XB-1019A-1B) is a high-performance thermal expansion valve power assembly engineered for demanding liquid injection applications. Designed for use with technical and misc. refrigerants, this stainless steel TXV power element integrates a 1/4" SAE Flare equalizer to ensure precise superheat control and system stability. The 5-foot capillary tube provides the necessary reach for flexible remote bulb placement, while the included capscrews simplify field installation during HVACR valve replacement or system upgrades.

Built for the rigors of industrial refrigeration, the Emerson XB-1019A-1B features a large diaphragm diameter that generates substantial force, resulting in smoother valve modulation and consistent refrigerant flow control. This Alco power assembly is specifically calibrated for the liquid injection application temperature range, making it a reliable choice for protecting compressors from high discharge temperatures. Its take-apart design allows technicians to service the power element without reclaiming the entire refrigerant charge from the main valve body, optimizing maintenance efficiency.

• Corrosion Resistance: Laser-welded stainless steel construction ensures long-term integrity in harsh mechanical environments.
• Precise Modulation: Large diaphragm area minimizes internal friction for superior superheat adjustment.
• Enhanced Stability: The external equalizer compensates for pressure drops across the evaporator or distributor.
• Simplified Service: Compatible with T-Series take-apart bodies, allowing for rapid element swaps using the included hardware.

What is the primary function of the XB-1019A-1B in a cooling system?
This power assembly acts as the sensing and actuation component of a thermostatic expansion valve, specifically tasked with managing liquid injection to regulate compressor head temperatures.

Is the Alco 034803 compatible with all T-Series valve bodies?
Yes, as a standard 1019-series element, it is designed to seat with Alco T-Series take-apart valve bodies, provided the refrigerant and temperature range requirements of the system are met.

Why is an external equalizer used on this specific power assembly?
The 1/4" SAE flare external equalizer allows the valve to sense pressure at the evaporator outlet, ensuring accurate superheat control even in systems with significant high-side pressure drops.

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.