In modern industrial operations, ensuring reliable sealing under extreme conditions is vital to equipment performance and safety. This is where spring-energized PTFE seals—commonly referred to as Panseal or Variseal—excel. These high-performance seals offer exceptional resistance in high-pressure and high-temperature environments where conventional rubber seals often fail.

At DXTSEALS, we specialize in producing custom PTFE spring-energized seals that maintain outstanding sealing integrity even in the most demanding applications.

🔍 What Is a Spring-Energized Seal?

A spring-energized seal is a high-performance sealing solution that consists of:

• A PTFE, PEEK, or other engineering plastic jacket

• A metal spring energizer (usually made from stainless steel or Elgiloy®)

The spring applies continuous force against the sealing surface, ensuring:

• Constant contact

• Compensation for wear or thermal expansion

• Superior sealing at both low and high pressures

🌡️ Why PTFE Spring-Energized Seals Perform in High-Pressure & High-Temperature Conditions

✅ 1. Excellent Temperature Resistance

PTFE and its composites can withstand temperatures from -200°C to +260°C, making them ideal for extreme heat or cryogenic applications. Unlike elastomeric seals (such as NBR or FKM), PTFE does not degrade or harden under prolonged heat exposure.

✅ 2. Outstanding Pressure Resistance

Spring-energized seals maintain sealing capability in pressures up to 70 MPa (10,000 psi) or more, depending on design. The spring ensures the sealing lip remains in contact under fluctuating or extreme pressure.

✅ 3. Chemical Inertness

PTFE is resistant to nearly all chemicals, acids, fuels, and solvents. In corrosive or aggressive fluid applications—such as in chemical processing, aerospace, or oil & gas—this is critical.

✅ 4. Low Friction and Wear Resistance

The low coefficient of friction in PTFE helps reduce energy loss, while added fillers (like carbon or glass fiber) improve its wear resistance even at high temperatures.

🏭 Common Applications

🛠️ Design Variations of PTFE Spring-Energized Seals

DXTSEALS offers multiple profiles based on pressure, movement type (static, reciprocating, rotary), and temperature range:

• U-Cup Design: Ideal for dynamic reciprocating motion

• Slant Seal Lip: For rotary and oscillating applications

• Heavy-Duty Spring Core: For ultra-high pressure sealing

• Vacuum-Grade Seals: For ultra-clean and low-leakage requirements

We also offer custom spring forces (light, medium, heavy) depending on the application’s specific needs.

🔩 Why Choose DXTSEALS?

With advanced CNC machining and engineering expertise, DXTSEALS provides:

• ✔ Precision-machined PTFE/PEEK seal profiles

• ✔ Custom spring configurations (V-spring, canted coil, helical, etc.)

• ✔ Full support for OEM and aftermarket needs

• ✔ Strict quality control and material traceability

• ✔ Fast prototyping and global shipping

📌 Conclusion

If your machinery operates under high pressure, high temperature, or chemically aggressive conditions, choosing the right seal is not optional—it’s essential. PTFE spring-energized seals from DXTSEALS are engineered to perform where others fail, ensuring safety, longevity, and performance across critical industries.

💡 Need assistance selecting or customizing the perfect Panseal/Variseal solution?
Visit us at www.dxtseals.com or contact our team today.