Trane VAL9555 Valve

The Trane VAL9555 Valve (OEM part VAL09555) is a high-precision thermostatic expansion valve (TXV) engineered specifically for 3-ton HVAC systems utilizing R-410A refrigerant. This non-balanced port valve is critical for maintaining steady superheat, featuring a factory setting of 83/87 PSIG superheat to ensure peak evaporator efficiency. Designed with 5/8-inch mechanical fittings for both inlet and outlet, it eliminates the need for brazing in specific Trane replacement applications, reducing the risk of internal contamination. The unit includes an internal check valve and an external equalizer measuring 0.125" OD by 20 inches in length, optimizing refrigerant flow control across varying load conditions. As a genuine OEM HVAC part, it guarantees exact mating dimensions and eliminates the compatibility risks associated with universal aftermarket alternatives. Professional contractors rely on this refrigerant metering device to prevent compressor slugging and ensure reliable performance in residential and light commercial Trane air handlers and heat pumps.

• System Efficiency: Maintains precise superheat levels within R410A refrigeration circuits to maximize heat exchange.
• HVAC Protection: The internal check valve prevents reverse flow issues, shielding the compressor from liquid floodback.
• Simplified Installation: Features 5/8" mechanical fittings for secure, thread-match connections without a torch.
• Reliable Regulation: The 20-inch external equalizer ensures accurate pressure sensing for stable valve response.
• OEM Reliability: Direct Trane VAL09555 replacement ensures full compatibility with 3-ton equipment specifications.

What are the signs of a failing Trane VAL9555 TXV?
Technicians typically observe symptoms such as a frozen evaporator coil, inconsistent discharge air temperatures, or excessive compressor noise due to improper refrigerant metering.

Is this valve compatible with R-22 systems?
No, the VAL9555 is specifically calibrated for the pressure-temperature characteristics of R-410A refrigerant and should not be used in legacy R-22 circuits.

How do I verify the seat size for 3-ton applications?
This expansion valve is factory-spec for Trane 3-ton units; always verify the 5/8" mechanical fitting sizes against your specific evaporator coil connections before beginning the service call.

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.