Expansion Valve 61 4091 614091 for Thermo King Tripac Evolution APU AC TXV

Product Overview

This expansion valve (TXV) is a precision metering component for Thermo King Tripac Evolution auxiliary power unit (APU) air conditioning systems. Replacing OEM part numbers 61-4091 and 614091, it regulates refrigerant flow into the evaporator to maintain consistent cooling output. Designed for direct fitment in Tripac Evolution APUs, this valve restores efficient A/C performance for truck cab comfort during idle or layover periods.

Key Features & Performance

• Direct OEM replacement – matches Thermo King part numbers 61-4091 and 614091
• Thermostatic expansion valve design for precise superheat control
• Constructed with brass and stainless steel for corrosion resistance
• Compatible with R‑134a and R‑1234yf refrigerants
• Factory‑calibrated for the Tripac Evolution APU’s cooling load

Fitment & Compatibility

• Thermo King Tripac Evolution APU (all model years)
• Thermo King APU systems originally using 61-4091 or 614091 TXV

Common Uses

• Refrigerant expansion control in Thermo King Tripac Evolution APU A/C systems
• Cab cooling in semi‑trucks and heavy‑duty trucks during rest stops
• Aftermarket replacement for OEM expansion valves in transport refrigeration
• Maintenance of auxiliary A/C performance for driver comfort

Technical Specifications

• Part Number(s): 61-4091, 614091
• Type: Thermal Expansion Valve (TXV) – externally equalized
• Refrigerant: R‑134a / R‑1234yf
• Connection: 3/8″ SAE flare inlet, 1/2″ SAE flare outlet
• Superheat Setting: 8°F – 12°F factory preset

Frequently Asked Questions

Q: Is this expansion valve compatible with the Thermo King Tripac Evolution APU from 2015? A: Yes, it is a direct replacement for all Tripac Evolution APU models using the 61-4091 or 614091 TXV. Confirm the connection type matches your existing valve.

Q: Can I use this valve with R‑134a refrigerant? A: Yes, it is designed for both R‑134a and R‑1234yf. Ensure your system is properly evacuated and recharged according to the correct refrigerant type.

Product appearance and specifications may vary slightly by batch. Compatibility may vary by serial number. Verify fitment before purchase.