Description
The S1-1TVMBA1 is a genuine OEM thermal expansion valve kit from York — designed to regulate refrigerant flow in air conditioning and heat-pump systems. This valve is engineered for systems using R-410A refrigerant and features a ¾-inch Chatleff connection, making it suitable for many split-system coils and air handlers.
Key Features
- OEM-certified replacement: Manufactured by York to original equipment specifications — ensures proper fit, reliable operation, and maintains system integrity.
- Compatible with R-410A systems: Designed for modern refrigerant use, making it appropriate for many newer HVAC installations and retrofits.
- ¾-inch Chatleff connection: Standard sizing for many coils and air-handler units — simplifies installation and reduces need for custom fittings.
- Controls refrigerant flow & superheat: Regulates refrigerant entering the evaporator coil to maintain correct refrigerant/vapor ratio — enhancing cooling efficiency and system reliability.
- Supports nominal 2-ton capacity (typical small/medium residential systems): Well-suited for typical residential air conditioning systems or light commercial setups.






