Trane VAL9588 TXV

The Trane VAL09588 Thermostatic Expansion Valve (TXV) is a critical commercial-grade metering component designed for precise refrigerant management in 7-ton R410A systems. Engineered to maintain stable superheat across varying load conditions, this Trane OEM expansion valve features 3/8" ODF inlet and 1/2" ODF outlet connections, ensuring a reliable sweat connection for high-pressure applications. With its 129.8 PSI rating and specialized thermostatic sensing element, the VAL09588 effectively prevents liquid slugging while maximizing evaporator efficiency. This valve (also found under part number VAL9588) is a direct replacement for many American Standard and Trane packaged rooftop units, providing the exact factory-specified flow coefficient required for 7-ton nominal capacities. When performing a change-out, verify the external equalizer and bulb placement to ensure the system reaches its 410A design performance standards without hunting or starving the coil.

• OEM Precision: Genuine Trane VAL09588 replacement ensures exact factory specifications for 7-ton HVAC systems.
• Optimal Superheat Control: Maintains precise liquid refrigerant flow, protecting the compressor from liquid floodback.
• High-Pressure Durability: Rated for 129.8 PSI, specifically optimized for the high-operating pressures of R410A refrigerant.
• Professional Grade Connections: Features standard 3/8x1/2 ODF (Solder) ends for a leak-free, permanent installation in commercial air handlers and rooftop units.

Is the VAL09588 compatible with older R22 systems?
No, this TXV is specifically calibrated for R410A refrigerant and its corresponding pressure-temperature relationship. Using it with R22 will result in improper metering and potential compressor damage.

What is the difference between VAL9588 and VAL09588?
These refer to the same Trane expansion valve. The "0" is often added in modern inventory systems, but the 7-ton capacity and 3/8" x 1/2" specifications remain identical.

Where should the sensing bulb be mounted for this 7-ton valve?
For 7-ton R410A systems with suction lines larger than 7/8 inch, the bulb should be mounted at the 4 or 8 o’clock position. On smaller lines, 12 o'clock is standard. Always ensure the bulb is insulated and has tight metal-to-metal contact.

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.