Custom Seals for Aerospace & Defense

Around the world, designers of commercial and military aerospace and defense systems trust Bal Seal Engineering’s springs and seals to protect critical equipment from leakage and potential failure. Our products help make equipment smaller, lighter, faster, and more power efficient.

Products for Aerospace & Defense

Bal Seal® Spring Energized Seal

Our seals are precision-machined from PTFE and other premium polymers, and they’re engineered to deliver longer service life and more equipment uptime. Their spring energizers ensure even, consistent wear, and their jacket materials can be customized to meet specific temperature, pressure, speed and chemical compatibility requirements in rotary, reciprocating, oscillating, and static applications.

Product Features

Controllable friction forces
Excellent media and temperature resistance
Wear-regulating spring energizer

Bal Spring® Canted Coil Spring

Our spring mechanically fastens, conducts electricity, and shields sensitive electronics from EMI/RFI. Its independent coils, which serve as multiple contact points for optimal current carrying capability, ensure consistent, reliable connection—even under shock and vibration. The spring can also serve as a thermal management component.

Product Features

Superior conductivity & power density
Compact, space-saving profile
Multifunctional for lighter, simpler designs
Customizable insertion/removal forces

Commercial Applications

Defense Applications

Aerospace Industry Achievements

Sealing in Space

When it comes to space travel, we’re frequent flyers. During Apollo missions, astronauts used tools with our seals in them to sample and store lunar soil. We’ve been helping NASA and others reach for the stars ever since.

Making Tracks on Mars

As part of the Curiosity Rover mission, our seals traveled >140 million miles. Today, they’re still protecting the rover’s drive mechanisms from harsh Martian environments.

Supersonic Shielding

At nearly twice the speed of sound, even a little interference can cause big problems. That’s why defense aircraft designers use our Bal Spring® to shield sensitive onboard electronics against EMI.

Aerospace & Defense Customer Successes

“Bal Seals did fly as part of the Flight Rover Differential Mechanism on the MSL Curiosity Rover. I appreciate the work your team did for us in this application.”

Ben Riggs, Mars Curiosity Rover Engineer
NASA/JPL

“When I saw the Bal Spring®, a light bulb went off. The multi-point coil contact provided exceptional grounding – zero resistance across the path. It was the ideal solution.”

Hans Raven, Engineer
ATK/Northrop Grumman