The reversing valve is provided with a main body formed essentially of two chambers through which the refrigerant circulates under high or low pressure, it further has a movable part called a slide provided at the ends of pistons which are responsible for the sealing between the chambers and the movement of the slide inside the main body.
The ends of the main body of the valve, where the chambers are located, and the suction line of the refrigerant circuit are connected to a pilot valve through capillary tubes. This pilot valve is driven by a solenoid and commands the actuation of the main body through the pressure difference caused between the chambers.
The valve is connected to the system piping through the brazing process and care must be taken in the installation.
For welding the reversing valve tubes to the sealed assembly, the body of the valve must remain submerged in water or wrapped in a wet cloth to prevent the flame of the torch from heating the valve body and damaging the internal components.
