Helicopter Engine Seals

Seals used in bleed air valves, air ducts and the bulkhead need to be fire proof. Fire Seals, specifically tested for fire resistance, are essential in preventing the spread of fire in the event of an emergency.

• Fabric reinforcement strengthens the shape of the seal, thereby increasing the lifetime
• Fire proof
• Designed to specification or to print
• Can include metal or composite base plate or insert

Trelleborg Sealing Solutions Aerospace provides a large number of custom-made tubes and bellows used in the plane’s hot air management  systems.

• Fabric reinforcement increases lifetime and retains shape
• Fire seal capability
• Designed to specification or to print

Used for safe routing of electrical wires, fuel and hydraulic pipes in many places on the aircraft, such as actuators and engines.

• TSS design to meet customer specifications
• Damping of elastomer block prevents pipe fatigue
• Unique fatigue resistant design of clamping band
• Elastomer color coded by material type

The Himod® series of gasket materials cover almost all needs for aircraft and engine gaskets. No tooling is required and we can cut a gasket into almost any shape using an Autocad or similar file format drawing.

• High Temperature sealing capability (+1100 °C)
• Several materials available
• Long term thermal stability
• Flexible cutting method allows for fast prototypes
• Wide range of materials cover all engine oils and fuels
• Simple 2D drawing required

In the hot areas of the engine it is impossible to use polymer seals and one alternative are metal seals, which have low leak rates and high flexibility.

• High operating temperature up to +1100 °C
• Designed to specification or to print
• Wide product range from high load metal O-Rings to highly flexible multi convolution seals with low loading
• Wide range of materials and coatings

Limiter plates can be integrated into the seal design to ensure a precise positioning and a correct  compression of the seal.

• High temperature sealing capability up to +1100°C / 2012°F
• Design to specification (e.g. ABS XXX) or to print
• Easy and precise installation
• Design eliminates over compression of elastomer lip

Multilip seals with leakage indicator integrated in seal design.

• TSS design to meet customer specifications
• Lips of Turcon materials compatible with all engine oils and fuels
• Up to 100 m/s rotary speed possible
• Secondary Sealing lip gives protection against external leakage

Thermal shielding can be used to lower the heat emission from engines and gearboxes, protecting the surrounding equipment.

• TSS design to meet customer specifications
• Metal Sandwich Design or Elastomer based solutions
• Effective reduction of heat emission