What is the application of an Evaporator Pressure Regulator (EPR)?
If it is important to maintain a specific pressure (temperature) in an evaporator, a modulating inlet pressure regulator can be installed in the suction line. The set point pressure that the valve is adjusted to is maintained by controlling the flow of refrigerant through the valve port. If the evaporator pressure rises above the set point the valve will open more and when it falls below set point the valve will start to close. The valve can be fitted with a solenoid which when de-energized fully closes the valve. e.g. for defrost cycles.
