Maximize safety, performance and long-term value with ORIGRAF® die-formed expanded graphite seals from Technetics.
Designed to outperform in extreme thermal and pressure cycling environments, ORIGRAF® seals deliver:
- Superior sealing integrity under fluctuating conditions
- Enhanced operational safety
- Reduced maintenance and downtime
- Optimized total cost of ownership
Whether you’re operating in high-temperature, high-pressure or chemically aggressive environments, ORIGRAF® seals provide the durability and consistency for your critical systems demand.
Why Choose ORIGRAF® Expanded Graphite Seals from Technetics Group?
ORIGRAF® die-formed expanded graphite seals are engineered to deliver exceptional sealing performance in the most demanding environments — where conventional solutions often fall short.
Unlike standard graphite gaskets or competitor expanded graphite seals, ORIGRAF® seals offer superior adaptability and resilience. Thanks to our proprietary manufacturing process, the graphite structure maintains flexibility, allowing the seal to conform to surface irregularities — even under offloading or transient conditions. This ensures consistent, leak-tight performance where others may fail.
What Makes ORIGRAF® Stand Out?
- Controlled Compression
Unlike flexible graphite-cut gaskets or spiral-wound gaskets, ORIGRAF® seals are designed with mechanical stops — such as precision-engineered grooves or inner/outer rings — that limit compression. This prevents overloading and protects the seal during thermal and pressure fluctuations. - Superior Stress Management – Built for Critical Applications
The design minimizes excessive sealing stress, preserving seal integrity and extending service life when assemblies are subject to high-pressure, high-temperature environments. ORIGRAF® seals are trusted in industries where safety, reliability and performance are non-negotiable — from energy and chemical processing to aerospace and defense.
Choose ORIGRAF® for a smarter, safer and more cost-effective sealing solution — engineered to reduce maintenance, improve operational safety and lower your total cost of ownership. Outperforming other manufacturers in real-world conditions.
Key Features of ORIGRAF® Expanded Graphite Seals
Engineered for performance in the most demanding environments, ORIGRAF® expanded graphite seals offer a unique combination of resilience, adaptability and ease of use:
- Exceptional Elastic Recovery
Achieves up to 40% compression recovery, delivering a reliable spring-back effect for long-term sealing performance (characterized in our MAESTRAL Laboratory). - Low Creep and Relaxation
Maintains dimensional stability under critical pressures and temperatures, reducing the need for retightening. - Radiation and Chemical Resistance
Ideal for nuclear and chemical processing applications, with excellent resistance to harsh media and radiation exposure (specific nuclear graphite grades on request — for instance, PMUC). - Thermal and Pressure Adaptability
Performs reliably under extreme temperature and pressure fluctuations, ensuring consistent sealing in transient conditions. - Metal-to-Metal Contact Design
Enhances structural strength and ensures consistent seating load control. - Insensitive to Asymmetric Bolt Tightening
Maintains sealing performance even when assembly torque is uneven — reducing installation errors and improving reliability. - Non-Adhesive to the Flanges Contact Surfaces
Usually does not bond to flanges, making removal and replacement quick and damage-free during maintenance.
Industries & Applications
ORIGRAF® expanded graphite seals are trusted across a wide range of high-demand industries where safety, reliability and performance are critical:
Industries Served:
- Nuclear Power & Research
- Chemical Processing
- Petrochemical & Refining
- Oil & Gas Exploration & Production
Common Applications:
- Steam Generators & Pressurizers
- Manholes & Other Critical Maintenance-Related Openings
- Heat Exchangers
- Piping Flange Connections
- Valves & Pumps
- Critical Flange Assemblies
Technical Specifications & Certifications
Engineered for extreme environments, ORIGRAF® seals deliver consistent performance under the most challenging operating conditions:
- Pressure Resistance: Up to 400 bar (5,802 PSI)
- Temperature Range: From -321°F to 4,532°F (-196°C to 2,500°C)
- Standard Sizes:
- DN: 15 to 600 mm (NPS: 1/2” to 24”)
Up to 1,500 mm (59”) on special request - Pressure Classes: CLASS 150 to 2500 / PN 20 to 420
- DN: 15 to 600 mm (NPS: 1/2” to 24”)
- Certifications:
- PMUC Certified by EDF (No. PMUC 17-0174)
- BAM Certified for use in oxygen-rich and high-risk environments
ORIGRAF® ON 002 Gaskets
Designed for compatibility with a wide range of flange types and standards:
- Suitable for flat-faced (FF) and raised-face (RF) flanges
- Supports single insertion (SE) configurations
- Compliant with NF-EN 1092-1 and NF-EN 1759-1 (ASME/ANSI B16.5) standards
Looking for a sealing solution that meets nuclear-grade standards and performs under extreme conditions?
ORIGRAF® seals are engineered to deliver maximum safety, minimal maintenance and long-term reliability — making them the preferred choice for engineers in the world’s most demanding industries.