Flight-critical and defense systems leave no margin for leakage, weight penalties, or maintenance-driven failure. SFC KOENIG expander plugs, restrictors, and check valves deliver lightweight, high-integrity sealing and flow control engineered to meet the strictest safety and qualification standards.
KOENIG EXPANDER® plugs seal landing gear, hydraulic actuator, and engine housings; KOENIG RESTRICTOR® components regulate flow in flight control hydraulics, fuel systems, and propeller controls; KOENIG CHECK VALVE® solutions manage flow in engine, cabin, and environmental control systems — securing precise, repeatable performance throughout the aircraft lifecycle.
The same field-proven sealing and flow control principles protect hydraulic and fluid systems in defense vehicles, platforms, and equipment operating in demanding, mission-critical environments where reliability is non-negotiable.
