Sleeve and poppet type valves are well suited for compact installations including engine nacelles and smaller aircraft. ASC sleeve type valves are used for engine anti-ice regulation and shutoff, high pressure bleed air regulation and shutoff, environment control system flow control (including bi-level regulation), and wing anti-ice regulation and shutoff. ASC poppet valves are used for engine bleed air shutoff and APU anti-surge. Sleeve and poppet type valves are used in all zones of aircraft ranging from engine compartment to tailcone