Trane VAL3615 TXV

The Trane VAL3615 is a high-precision thermostatic expansion valve (TXV) engineered for R-22 refrigerant systems with a nominal 1.5-ton capacity. Designed as an OEM replacement for residential air handlers and heat pumps, this HVAC expansion valve regulates refrigerant flow to maintain stable evaporator superheat, protecting the compressor from liquid slugging while maximizing heat transfer efficiency.

This valve features a 3/8 x 1/2 ODF sweat connection and includes a 30-inch capillary tube with a sensing bulb to monitor suction line temperatures. The mechanical metering device responds to load variations by modulating the orifice, ensuring that the evaporator coil avoids both starving and flooding during operation. For technicians servicing older R-22 equipment, the VAL3615 provides the reliable modulation required to maintain system performance standards. For a complete installation, ensure the external equalizer is properly connected and the sensing bulb is securely strapped at the 4 or 8 o’clock position on a horizontal suction line section for accurate feedback.

• OEM Compatibility: Exact fit for 1.5-ton Trane and American Standard A-coils, ensuring seamless integration with existing R-22 liquid lines.
• Critical Compressor Protection: Precisely modulates flow to prevent unevaporated liquid refrigerant from returning to the suction port.
• Optimized Heat Exchange: Maintains consistent superheat at the evaporator outlet, stabilizing the refrigeration cycle under varying thermal loads.
• Durable Construction: Built with robust internal components to withstand pressure fluctuations common in older residential systems.

Is the Trane VAL3615 compatible with R-410A systems?
No, this valve is specifically calibrated for R-22 refrigerant pressures and properties. Installing it in an R-410A system will cause incorrect metering and potential equipment failure.

Where should the sensing bulb be mounted?
The bulb must be mounted on the suction line at the outlet of the evaporator coil, ideally on a horizontal run in the 4 or 8 o’clock position, and insulated to prevent influence from ambient air temperature.

Does this valve require a hard start kit?
If installed in a system using a reciprocating compressor, a hard start kit is highly recommended to assist the motor during startup against the pressure differential maintained by the non-bleed TXV.

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.