Carrier EA03SC455 Thermostatic Expansion Valve (TXV)

The EA03SC455 is a Thermostatic Expansion Valve (TXV) used in Carrier HVAC systems. A TXV is a metering device that precisely controls how much refrigerant enters the evaporator coil, which is essential for proper cooling performance.

🔧 Key Facts

• It is an official OEM Carrier part.
• Designed for R‑22 refrigerant systems.
• Rated for approximately 8 tons of cooling capacity.
• Uses 5/8" inlet and 1 3/8" outlet sweat connections.
• Includes a 60-inch capillary tube.
• Constructed with bi‑metal components to respond to temperature changes and regulate refrigerant flow.

🏭 What It Does in an HVAC System

A TXV like the EA03SC455:

• Regulates refrigerant flow into the evaporator
• Improves system efficiency
• Helps maintain stable superheat
• Protects the compressor from flooding or starving

📦 Typical Use

You’ll find this valve in many Carrier commercial and residential R‑22 systems, especially older units still in service.

If you want, I can help you:

• Identify whether this TXV fits your specific unit
• Compare it to compatible replacements
• Explain how TXVs work in more detail

• Shipping Height5.2 in
• Shipping Length3.1 in
• Shipping Width6.7 in
• Shipping Weight1.9 lb