Trane VAL3824 TXV

The Trane VAL3824 is a precision-engineered 1.5-ton thermal expansion valve (TXV) designed specifically for R-22 refrigerant systems. This externally equalized valve features a 3/8" ODF inlet and a 1/2" ODF outlet, ensuring a secure fit in standard 1.5-ton residential and light commercial air conditioning configurations. With a 30-inch capillary tube, this OEM replacement component provides the necessary reach for complex evaporator coil internal header layouts, allowing for accurate sensing of suction line temperature. The VAL3824 TXV is essential for maintaining the correct superheat across the evaporator, protecting the compressor from liquid slugging while maximizing heat transfer efficiency in aging R-22 equipment. When performing a change-out, ensure the sensing bulb is properly insulated and mounted at the 4 o'clock or 8 o'clock position on the suction line to maintain optimal refrigerant flow control and system stability.

Technical Specifications & Key Benefits

• Direct OEM Replacement: Ensures exact mechanical fit and pressure drop characteristics for Trane and American Standard units.
• R-22 Optimization: Specifically calibrated for the pressure-temperature relationship of R-22 refrigerant.
• Tonnage Rating: Rated for 1.5-ton capacity, ideal for smaller residential split systems or heat pumps.
• Extended Capillary: The 30" capillary length prevents tension on the bulb connection during installation in tight cabinets.
• Reliable Superheat Control: Maintains consistent evaporator saturation, reducing HVAC compressor wear and improving SEER performance.

Common Questions from the Field

Can I use the VAL3824 on an R-410A system?
No. This valve is specifically designed for R-22 system charging and pressure ranges. Using this valve with R-410A will result in incorrect refrigerant metering and potential system failure.

What is the primary cause of TXV hunting?
In most 1.5-ton AC units, hunting is caused by incorrect bulb placement or a loss of charge in the power assembly. Ensure the VAL3824 sensing bulb has 100% contact with the suction line.

Does this valve include the chatleff nut?
The Trane VAL3824 typically utilizes ODF solder connections (3/8" x 1/2") rather than threaded chatleff fittings. Always verify the connection type on your existing evaporator coil before brazing.

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.