Klüber BARRIERTA L 55/2 High-Temperature Long-Term Grease: Technical Analysis and Application Guide
The Klüber BARRIERTA L 55/2 is a high-performance, NSF H1-registered, food-grade long-term grease engineered for extreme thermal environments and aggressive media exposure. Based on perfluorinated polyether oil (PFPE) and thickened with PTFE, this product from the BARRIERTA L55 series delivers reliable lubrication in the most demanding industrial applications, including food processing, pharmaceuticals, cosmetics, and chemical manufacturing. Its wide service temperature range from -40°C to +260°C and exceptional chemical resistance make it a top-tier choice for OEMs and maintenance professionals worldwide.
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Product Overview
Klüber BARRIERTA L 55/2 is part of the renowned BARRIERTA L55 series — Europe's oldest premium brand of high-temperature lubricants based on perfluorinated polyether oil (PFPE). Engineered for extreme conditions, this NLGI grade 2 grease provides outstanding long-term lubrication stability, low evaporation loss, and excellent resistance to oxidation, chemicals, and aggressive media.
Designed intentionally without silicone raw materials, BARRIERTA L 55/2 is NSF H1 registered, making it safe for incidental food contact in the food-processing, cosmetics, pharmaceutical, and animal feed industries. Its compatibility with most plastics and elastomers further expands its versatility across automated production lines and precision bearings.
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Key Technical Specifications
The following table summarizes the critical technical data for Klüber BARRIERTA L 55/2, verified against official Klüber Lubrication product information (Edition 07.04, Art.-Nr. 090013).
| Parameter | Value | Standard / Notes |
|---|---|---|
| Base Oil Type | Perfluorinated Polyether Oil (PFPE) | — |
| Thickener | PTFE (Polytetrafluoroethylene) | — |
| NLGI Grade | 2 | DIN 51818 |
| Lower Service Temperature | -40°C / -40°F | — |
| Upper Service Temperature | +260°C / +500°F | Long-term capability |
| Density at 20°C | approx. 1.96 g/cm³ | — |
| NSF Registration | H1 (Food Grade) | Incidental food contact |
| Silicone Content | None | Made without silicone raw materials |
| Shelf Life | 60 months (5 years) | From date of manufacture |
| Plastics/Elastomer Compatibility | Excellent — Neutral to most materials | Including FKM, FVMQ |
| Chemical Resistance | Excellent | Resistant to aggressive media and vapors |
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Functional Description and Performance Characteristics
Exceptional Thermal Stability
The BARRIERTA L 55/2 grease delivers reliable lubrication across an extraordinarily wide temperature span from -40°C to +260°C. Independent testing on FAG-FE9 and SKF-R0F machines demonstrates that PFPE-based greases like L 55/2 significantly outperform conventional ester, PAO, and silicone-based greases in grease life at elevated temperatures. At 200°C, BARRIERTA L 55/2 maintains grease life several orders of magnitude longer than standard high-temperature greases.
Chemical and Media Resistance
Thanks to its PFPE base oil and PTFE thickener system, BARRIERTA L 55/2 exhibits inertness toward aggressive chemicals, solvents, acids, and alkalis. This makes it the preferred choice for lubrication points in chemical processing equipment, filling machinery, and sterilization units where exposure to harsh cleaning agents is routine.
Plastic and Elastomer Compatibility
One of the standout features of BARRIERTA L 55/2 is its neutral behavior toward most plastic materials and elastomers. This is critical in applications involving seals, O-rings, and plastic bearing cages. Compatibility testing shows minimal volume change (typically +0.5%) and negligible hardness change (Shore A change of -1) for FKM elastomers after 168 hours at 160°C.
Low Evaporation and Long-Term Stability
The PFPE chemistry results in an extremely low evaporation rate even at sustained high temperatures, reducing the need for frequent re-lubrication and extending maintenance intervals. With a shelf life of up to 60 months, this grease is ideal for long-term storage and just-in-time deployment in automated manufacturing environments.
NSF H1 Food-Grade Certification
BARRIERTA L 55/2 is registered as NSF H1, confirming its suitability for applications where incidental contact with food products may occur. This registration covers use in the food-processing, cosmetics, pharmaceutical, and animal-feed industries, providing peace of mind for quality assurance and regulatory compliance teams.
Application Areas
- Food & Beverage Processing: Lubrication of filling machine bearings, conveyor chains, oven bearings, and packaging equipment operating at high temperatures.
- Pharmaceutical Manufacturing: Clean-room compatible lubrication for tablet presses, capsule fillers, and sterile packaging lines.
- Chemical Industry: Bearings and seals exposed to aggressive chemicals, solvents, and high-temperature vapors.
- Automotive and Aerospace: High-temperature pivot points, throttle linkages, and wheel bearings in testing and production environments.
- Plastic Processing: Injection molding machine bearings, extruder screws, and take-off rollers where plastic compatibility is critical.
- Textile Industry: Stenter frames, drying cylinders, and high-temperature tenter frame chain lubrication.
Performance Comparison: BARRIERTA L 55/2 vs. Conventional Greases
| Property | BARRIERTA L 55/2 (PFPE) | Standard Lithium Grease | Polyurea Grease |
|---|---|---|---|
| Max Continuous Temperature | 260°C | ~120–150°C | ~180–200°C |
| Low Temperature Limit | -40°C | -20°C to -30°C | -20°C to -30°C |
| Chemical Resistance | Excellent | Poor to Moderate | Moderate |
| NSF H1 Registration | Yes | Varies | Varies |
| Plastic Compatibility | Excellent | Poor to Moderate | Moderate |
| Grease Life at 200°C | Very High | Not suitable | Limited |
Frequently Asked Questions (FAQ)
Why Choose BARRIERTA L 55/2 for Your Operation?
Industrial facilities that operate under extreme thermal and chemical stress consistently turn to Klüber's BARRIERTA series for its proven reliability. The BARRIERTA L 55/2 delivers:
- Extended maintenance intervals — reduced downtime and lower total cost of ownership.
- Regulatory compliance — NSF H1 registration simplifies food safety audits.
- Process reliability — consistent performance even when process temperatures fluctuate.
- Versatility — one grease for multiple applications across production lines.
Whether you are maintaining high-speed oven bearings in a bakery, conveyor chains in a pharmaceutical cleanroom, or rollers in a chemical plant, BARRIERTA L 55/2 is engineered to perform.
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References and Further Reading
- Klüber Lubrication — BARRIERTA L 55/2 Official Product Page: https://www.klueber.com/us/en/products-service/products/barrierta-l-55-2/9880/
- BARRIERTA L55 Series Product Information (Edition 07.04, Art.-Nr. 090013): Download PDF
- Klüber Lubrication PFPE Products Brochure — Performance comparison data: Download PDF
- Quality Bearings Online — BARRIERTA L 55/2 Technical Data Sheet: View TDS
- Euro-Industry — Product specifications and pricing: Product Listing
- NSF International — H1 Lubricant Registration Information
Disclaimer: Technical data provided is based on manufacturer published specifications. Always consult the official Safety Data Sheet (SDS) delivered with your product for handling and safety information specific to your batch.
