Klüber Summit RHT FG 68

High-Performance Refrigeration Compressor Oil for Industrial Applications

Key Features & Benefits

• Lower Oil Carryover: Due to its high level of refinement, Klüber Summit RHT FG 68 significantly reduces oil consumption compared to conventional mineral oils.
• Stable Viscosity: Contains minimal volatile hydrocarbons, preventing viscosity increases and premature oil changes.
• Superior Chemical Stability: Designed to resist ammonia’s effects, preventing black deposits and sludge formation common with mineral oils.
• Extended Oil Change Intervals: Its hydrogenated base oil allows for longer maintenance cycles and improved refrigeration efficiency due to low solubility in ammonia.
• Reliable Low-Temperature Performance: Proven to perform in evaporator temperatures as low as -33°C, depending on operational conditions.
• Industry Compliance: Meets DIN 51 5031, KAA standards and is NSF H1-registered, complying with FDA 21 CFR 178.3570 for incidental food contact.
• Safe for Food & Pharma Industries: Suitable for food processing, cosmetics, pharmaceuticals, and animal feed applications, supporting HACCP-based risk management.

Applications

Klüber Summit RHT FG 68 is specifically developed for screw-type and reciprocating piston compressors in industrial refrigeration systems.

Application Guidelines

1. Drain old oil from the refrigeration circuit while warm.
2. Replace oil filters and separators, and fully drain oil traps.
3. Refill the compressor with Klüber Summit RHT FG 68.
4. Oil Compatibility:
   • Miscible with many refrigeration oils based on mineral oil, alkylbenzenes, and PAOs.
   • Check miscibility before use. For optimal performance, a complete oil and filter change is recommended.

Seal Compatibility & Considerations

• Neutral towards most chloroprene and neoprene seals used in refrigeration systems.
• Less soluble than naphthene-based mineral oils, minimizing seal swelling effects.
• Possible Seal Shrinkage: When switching from naphthene-based oils, minor temporary leaks may occur as seals return to their original size. These are typically small and reversible, depending on system maintenance and runtime.