Overview of Lee Components in Aerospace Systems

This document lists various Lee brand components used across multiple aerospace systems, highlighting their applications in flight controls, fuel systems, engine gearboxes, auxiliary power units, hydraulics, landing gear, brakes, steering, airflow control, oxygen systems, and avionics cooling.

1. Secondary Flight Controls

• Components: Lee Jet, Pressure Relief Valve, High Watt Jet, Check Valve, Safety Screen, Hi-Bar Screen.
• Purpose: Ensure reliable control surface actuation and system protection.

2. Weapons Systems

• Component: Lee Zero Leak Check Valve.
• Function: Prevent leakage ensuring weapon system integrity.

3. Main & Afterburner Fuel Systems

• Components: Lee Jet, Check Valve, Safety Screen, Ejector Pump, High Watt Jet.
• Role: Manage fuel flow and filtration for engine performance and safety.

4. Engine Gearbox

• Components: Lee Plug Jet, Check Valve, Safety Screen, Combination Relief/Needle Valve.
• Function: Protect gearbox by controlling pressure and filtering contaminants.

5. Auxiliary Power Unit (APU)

• Component: Lee Pressure Relief Valve.
• Purpose: Maintain safe pressure levels within the APU system.

6. Hydraulic Power Pack

• Components: Lee Pressure Relief Valve, Check Valve integrated in Rosán Fitting®.
• Role: Regulate hydraulic pressure and prevent backflow.

7. Landing Gear

• Components: Lee Spring Biased Shuttle Valve, High Pressure Flow Control, Jeva Multi Orifice Restrictor, Pressure Relief Valve, High Watt Jet, Restrictor in Rosán Fitting®.
• Function: Control hydraulic flow and pressure for landing gear operation and safety.

8. Brakes and Steering

• Components: Lee Check Valve, Hi-Bar Screen, Thermal Relief Valve, Check Valve in Rosán Fitting®, Detented Shuttle Valve.
• Purpose: Ensure reliable braking and steering by controlling fluid flow and pressure relief.

9. Air Flow Control System

• Components: Lee Check Valve, Safety Screen, Bypass Valve, High Pressure Relief Valve, Pressure Relief Valve, High Pressure Visco Jet.
• Role: Manage airflow regulation and system protection.

10. Lee Plug

• Components: Lee Plugs, Jet, Thermal Relief Valve, High Watt Jet in Rosán Fitting®, Check Valve.
• Application: Used throughout various systems for sealing, pressure relief, and flow control.

11. Auxiliary Flight Controls

• Components: Lee Jeva Multi Orifice Restrictor, Jet, Spring Biased Shuttle Valve, High Watt Jet, Check Valve.
• Function: Support primary flight controls with precise flow and pressure management.

12. Primary Flight Controls

• Components: Lee Inlet Check in Rosán Fitting®, Jet, Safety Screen.
• Purpose: Ensure dependable operation of primary flight control systems.

13. Avionics Cooling

• Components: Lee Check Valve, Safety Screen, Pressure Relief Valve, Plug Jet, Piloting Solenoid Valve.
• Role: Maintain cooling system integrity and protect avionics equipment.

Key Insights and Best Practices

• Lee components are widely integrated across critical aerospace systems for flow control, pressure regulation, filtration, and safety.
• Use of specialized fittings such as Rosán Fitting® enhances component integration and reliability.
• Pressure relief valves and check valves are essential for preventing system overpressure and backflow, ensuring operational safety.
• Multi orifice restrictors and high watt jets provide precise flow control tailored to system requirements.
• Safety screens are consistently employed to protect sensitive components from contamination.

Lee Innovations emphasize miniature, reliable components designed to enhance aerospace system performance and safety.