Aircraft nacelle purge and antifreeze air pressure regulating systems, and, purge air regulation method on an antifreeze system

摘要

Aircraft nacelle purge and antifreeze air pressure regulating systems, and method of regulating purge air on an antifreeze system. a purge air pressure regulating system (30) for an aircraft antifreeze system comprises a first upstream pressure regulating valve (32) and a second downstream pressure regulating valve (34) arranged in series in a purge airflow purge path (28). the respective pressure regulating valves (32, 34) each have a pressure regulating chamber (74) in fluid communication with a respective pressure regulating valve (82, 84). each pressure setting valve (82, 84) is in fluid communication with a purge air inlet (88, 96) upstream of the first upstream pressure regulating valve (32). the first upstream pressure regulating valve (32) is set to regulate the purge air pressure to a first pressure and the second downstream pressure regulating valve (34) is set to regulate the purge air pressure to a a second pressure that is greater than the first pressure.