This combination of pressure regulator and solenoid valve controls the oxygen supply in an incubator for premature infants in pediatrics. The unit and its connection periphery are perfectly integrated in the incubator and guarantee the respiration air supply within defined limits. The focus of this customer-specific development was combining the special requirements concerning NIST screw connection and ventilation via “muffler“ with the regulator-valve combination in a particularly small and space-saving design.