The York S1-1TVMBD1 (190110 / S49865761019) Expansion Valve/TXV Kit is a genuine OEM R-410A thermostatic expansion valve engineered to regulate refrigerant flow precisely and maintain optimal superheat control. This model features an internal check valve for enhanced system efficiency and smooth operation in both cooling and heating modes. Equipped with a 3/4" Chatleff connection, it ensures a secure, leak-resistant fit compatible with multiple York air conditioning and heat pump systems. Key Features: Genuine York OEM TXV Kit with integrated internal check valve. Designed for R-410A refrigerant systems. 3/4" Chatleff connection for simple installation. Maintains accurate superheat for system efficiency. Enhances performance and refrigerant control. Durable brass and stainless steel construction for long-term reliability. Specifications: Part Numbers: S1-1TVMBD1 / 190110 / S49865761019 Type: Thermal Expansion Valve (TXV) Refrigerant: R-410A Connection Type: 3/4" Chatleff Connector Includes: Internal Check Valve Application: Air Conditioning Heat Pump Systems Manufacturer: York (Johnson Controls) Compatible Models: CM60CBDA1, CF60CBDA1, CF60DBDA1, CM60CBDA2, CF60CBDA2, CF60DBDA2, CM60DBDA2 Why Choose This Item: The York S1-1TVMBD1 TXV Kit ensures precise refrigerant metering and consistent superheat, improving system efficiency and reliability. With its internal check valve and factory-engineered design, this OEM valve offers a perfect fit, optimal refrigerant control, and long-lasting performance?making it an ideal replacement to maintain York system specifications and comfort standards,