These valves inflate FAA approved Emergency Escape Slides in commercial aircraft. They regulate the airflow from a pressurized cylinder to emergency life rafts and aircraft slides for commercial and general aviation aircraft. GPIS has designed and manufactured approximately 30 different co Ball Valves and Regulators – These valves are used to inflate FAA approved Emergency Escape Slides in commercial aircraft. They regulate the airflow from a pressurized cylinder to inflate a slide. They may or may not be used in conjunction with an aspirator. GPC has designed and manufactured approximately 30 different configurations of these Ball Valves since 1968.