In high-demand industries such as aerospace, semiconductors, chemical processing, and medical devices, sealing failures are simply not an option. That’s why more engineers and procurement managers are turning to spring-energized seals (SES)—also known as Variseals—to ensure optimal performance under extreme pressure, temperature, and chemical exposure.

But choosing the right material or seal profile isn’t enough. The true performance of a spring-energized seal depends heavily on how it’s made—and that’s where CNC machining becomes essential.

At DXTSEALS, we specialize in high-precision CNC manufacturing of custom spring-energized seals designed for the world’s most challenging applications.

🔍 What Are Spring-Energized Seals?

Spring-energized seals combine a polymer jacket (typically PTFE, PEEK, or UHMWPE) with a metal spring that applies continuous force, ensuring constant contact with the sealing surface—even when pressure fluctuates or the system cools down.

They are ideal for:

• Extreme low or high temperatures (cryogenic to +300°C)

• High vacuum or ultra-high pressure environments

• Aggressive chemicals and gases

• Dynamic motion (rotary, reciprocating, oscillating)

🔧 Why CNC Machining Is Crucial for High-Performance Seals

Spring-energized seals must meet tight tolerances and precise surface finishes to perform reliably. CNC (Computer Numerical Control) machining offers several advantages that make it indispensable for SES production:

✅ 1. Tight Tolerance Control

CNC machining can maintain tolerances as low as ±0.005 mm, ensuring:

• Perfect seal-to-hardware fit

• Consistent spring preload for sealing integrity

• Minimal leakage, even in extreme applications

✅ 2. Superior Surface Finishes

Low-friction, smooth surfaces are key to dynamic sealing. CNC lathes provide:

• Surface roughness down to Ra 0.2 µm

• Reduced wear and longer service life

• Enhanced sealing against fine particulates or gases

✅ 3. Customization & Complex Profiles

Every application is unique. CNC machining enables:

• Asymmetric lip designs for bidirectional sealing

• Integrated back-up rings or wiper features

• Design flexibility for both static and dynamic seals

✅ 4. Material Versatility

CNC machining handles a wide variety of sealing materials including:

• Virgin and filled PTFE (glass, carbon, bronze)

• PEEK, UHMWPE, PPS, and other engineering plastics

• Metallic components such as stainless steel or Inconel for spring or jacket support

🏭 DXTSEALS: CNC Experts for Spring-Energized Seal Manufacturing

At DXTSEALS, we combine high-end CNC lathe systems with experienced sealing engineers to produce spring-energized seals that outperform expectations in the most demanding industries.

Our capabilities include:

• 📐 Fully custom seal design based on application specs

• 🔧 In-house CNC machining for fast prototyping and mass production

• 🔍 Material consulting to match the right polymer with your sealing needs

• 📦 Rapid lead times and strict quality control standards

💡 When to Choose CNC-Machined Spring-Energized Seals

Consider CNC-machined SES if your application involves:

• High-pressure hydraulic systems

• Ultra-high vacuum environments

• Rotary shafts at high speed or temperature

• Food & pharma equipment needing clean, traceable materials

• Chemical reactors exposed to aggressive media

🚀 Boost Performance with CNC Precision – Choose DXTSEALS

High-performance sealing isn’t just about materials—it’s about precision, repeatability, and custom engineering. CNC machining ensures your spring-energized seals perform flawlessly, no matter the challenge.

🔗 Learn more at www.dxtseals.com or contact our team to get a custom quote for your sealing solution.

Let DXTSEALS be your partner in precision.