Trane VAL08721BBIZE-2-GA Thermal Expansion Valve

Description:

The Trane VAL08721 (BBIZE-2-GA) thermal expansion valve (TXV) is an OEM refrigerant metering device used in Trane commercial and residential HVAC systems to regulate refrigerant flow into the evaporator coil. Designed for R-410A refrigerant and 2-ton cooling applications, this externally equalized Sporlan BBIZE-2-GA valve automatically adjusts refrigerant flow based on evaporator load, maintaining proper superheat for efficient cooling performance and compressor protection. HVAC technicians use the VAL08721 for replacement, repair, and preventive maintenance of compatible Trane air conditioners, heat pumps, and packaged units.

Applications:

The Trane VAL08721 thermal expansion valve is designed to meter liquid refrigerant into the evaporator coil, ensuring optimal superheat control over varying operating conditions. It is commonly installed in Trane split systems, rooftop units, heat pumps, and packaged air conditioning equipment serving commercial buildings, offices, retail facilities, and residential applications. The BBIZE-2-GA valve is also specified by Trane for approximately 2 to 3 ton evaporator applications and may be interchanged with the ERZE-2-GA valve where approved by Trane.

Technical Specifications:

• Manufacturer Part Number (MPN): VAL08721
• Valve Model: BBIZE-2-GA
• Manufacturer: Trane / Sporlan
• Product Type: Thermal Expansion Valve (TXV)
• Refrigerant: R-410A
• Nominal Capacity: 2 Ton
• Valve Type: Externally Equalized Thermal Expansion Valve
• Connection Size: 3/8 in. ODS Inlet × 1/2 in. ODS Outlet
• Function: Automatic Refrigerant Flow and Superheat Control
• Compatible Equipment: Trane Air Conditioners, Heat Pumps, Rooftop Units, and Packaged HVAC Equipment (model dependent)
• Installation Type: OEM Replacement Thermal Expansion Valve
• Application Environment: Residential HVAC, Commercial HVAC, Split Systems, Rooftop Units, and Refrigeration Equipment

Common Replacements:

• Trane VAL08721 OEM Thermal Expansion Valve (BBIZE-2-GA)
• Sporlan ERZE-2-GA (approved alternate for BBIZE-2-GA where specified by Trane)
• OEM Trane thermal expansion valve specified by the equipment model and serial number