Product Details: The Airsource Block Type A/C Expansion Valve is the perfect choice for controlling the flow rate of the refrigerant in the evaporator. This valve contains a small orifice that helps regulate the refrigerant's flow, ensuring that the system is running at optimal efficiency. The valve is designed to withstand the harsh conditions of high-pressure and extreme temperatures, making it ideal for Volvo and Mack vehicles. By installing this valve, you can improve the cooling performance of your vehicle while reducing energy consumption. FleetPride is your First Click in Heavy Duty®.