Trane VAL8798 TXV
The Trane VAL8798 TXV is a high-precision thermostatic expansion valve engineered for 3-ton residential and light commercial air conditioning and heat pump systems. Designed to withstand the high-discharge pressures of R410A refrigerant, this OEM component ensures exact superheat control to prevent compressor liquid slugging and maximize evaporator efficiency. The valve features a 3/8" ODF inlet and a 1/2" ODF outlet, providing a secure brazed connection for leak-free performance in high-vibration applications.
For veteran technicians, the VAL8798 is a direct replacement for 3-ton TXV kits, specifically optimized for use with POE (Polyolester) oil. Its non-bleed design maintains system pressure during the off-cycle, which is essential for maintaining SEER ratings in modern high-efficiency split systems. When performing a change-out, ensure the sensing bulb is properly insulated and secured to the suction line to prevent "hunting" and erratic refrigerant flow. This Trane thermal expansion valve is the industry standard for restoring factory-spec performance in 36,000 BTU cooling circuits.
Key Benefits:- Specifically calibrated for 3-ton HVAC systems using R410A.
- Compatible with POE oil to ensure reliable lubrication and internal part longevity.
- 3/8 x 1/2 ODF solder connections deliver a robust, permanent seal.
- Hard-shutoff design improves system efficiency by preventing refrigerant migration during downtime.
- Genuine Trane OEM replacement part ensures exact fitment and pressure ratings.
- Does this valve require a hard start kit? While not always mandatory, installing a hard start kit is highly recommended when using a non-bleed TXV like the VAL8798 with a reciprocating compressor to assist in overcoming pressure imbalances.
- Can I use this for a 2.5-ton system? This valve is specifically orificed for 3-ton (36,000 BTU) capacity. Using an oversized valve can lead to low superheat and floodback issues.
- What is the proper bulb orientation? For a 1/2" suction line, the sensing bulb should be mounted at the 4 or 8 o’clock position on a horizontal run for accurate temperature sensing.
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.
Original: $258.80
-65%$258.80
$90.58Trane VAL8798 TXV
The Trane VAL8798 TXV is a high-precision thermostatic expansion valve engineered for 3-ton residential and light commercial air conditioning and heat pump systems. Designed to withstand the high-discharge pressures of R410A refrigerant, this OEM component ensures exact superheat control to prevent compressor liquid slugging and maximize evaporator efficiency. The valve features a 3/8" ODF inlet and a 1/2" ODF outlet, providing a secure brazed connection for leak-free performance in high-vibration applications.
For veteran technicians, the VAL8798 is a direct replacement for 3-ton TXV kits, specifically optimized for use with POE (Polyolester) oil. Its non-bleed design maintains system pressure during the off-cycle, which is essential for maintaining SEER ratings in modern high-efficiency split systems. When performing a change-out, ensure the sensing bulb is properly insulated and secured to the suction line to prevent "hunting" and erratic refrigerant flow. This Trane thermal expansion valve is the industry standard for restoring factory-spec performance in 36,000 BTU cooling circuits.
Key Benefits:- Specifically calibrated for 3-ton HVAC systems using R410A.
- Compatible with POE oil to ensure reliable lubrication and internal part longevity.
- 3/8 x 1/2 ODF solder connections deliver a robust, permanent seal.
- Hard-shutoff design improves system efficiency by preventing refrigerant migration during downtime.
- Genuine Trane OEM replacement part ensures exact fitment and pressure ratings.
- Does this valve require a hard start kit? While not always mandatory, installing a hard start kit is highly recommended when using a non-bleed TXV like the VAL8798 with a reciprocating compressor to assist in overcoming pressure imbalances.
- Can I use this for a 2.5-ton system? This valve is specifically orificed for 3-ton (36,000 BTU) capacity. Using an oversized valve can lead to low superheat and floodback issues.
- What is the proper bulb orientation? For a 1/2" suction line, the sensing bulb should be mounted at the 4 or 8 o’clock position on a horizontal run for accurate temperature sensing.
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.
Product Information
Product Information
Shipping & Returns
Shipping & Returns
Description
The Trane VAL8798 TXV is a high-precision thermostatic expansion valve engineered for 3-ton residential and light commercial air conditioning and heat pump systems. Designed to withstand the high-discharge pressures of R410A refrigerant, this OEM component ensures exact superheat control to prevent compressor liquid slugging and maximize evaporator efficiency. The valve features a 3/8" ODF inlet and a 1/2" ODF outlet, providing a secure brazed connection for leak-free performance in high-vibration applications.
For veteran technicians, the VAL8798 is a direct replacement for 3-ton TXV kits, specifically optimized for use with POE (Polyolester) oil. Its non-bleed design maintains system pressure during the off-cycle, which is essential for maintaining SEER ratings in modern high-efficiency split systems. When performing a change-out, ensure the sensing bulb is properly insulated and secured to the suction line to prevent "hunting" and erratic refrigerant flow. This Trane thermal expansion valve is the industry standard for restoring factory-spec performance in 36,000 BTU cooling circuits.
Key Benefits:- Specifically calibrated for 3-ton HVAC systems using R410A.
- Compatible with POE oil to ensure reliable lubrication and internal part longevity.
- 3/8 x 1/2 ODF solder connections deliver a robust, permanent seal.
- Hard-shutoff design improves system efficiency by preventing refrigerant migration during downtime.
- Genuine Trane OEM replacement part ensures exact fitment and pressure ratings.
- Does this valve require a hard start kit? While not always mandatory, installing a hard start kit is highly recommended when using a non-bleed TXV like the VAL8798 with a reciprocating compressor to assist in overcoming pressure imbalances.
- Can I use this for a 2.5-ton system? This valve is specifically orificed for 3-ton (36,000 BTU) capacity. Using an oversized valve can lead to low superheat and floodback issues.
- What is the proper bulb orientation? For a 1/2" suction line, the sensing bulb should be mounted at the 4 or 8 o’clock position on a horizontal run for accurate temperature sensing.
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.
