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Fomblin® Y LVAC 16/6
4 5 (1 evaluate)Category: Fomblin® Y
Maker: Syensqo
Made in: Italy
Packaging: 1kg, 5kg
What Is Fomblin® Y LVAC 16/6?
Fomblin® Y LVAC 16/6 is a medium-to-high-viscosity perfluoropolyether (PFPE) fluid developed for demanding vacuum-pump lubrication. It combines very low vapor pressure, chemical inertness, thermal stability and non-flammability, making it suitable for vacuum systems exposed to aggressive gases or strict contamination-control requirements. Syensqo’s vacuum-application literature specifically identifies Y LVAC 16/6 for the lubrication of compatible Roots vacuum pumps.
Key Features and Process Benefits of Fomblin® Y LVAC 16/6
| Key feature | Process and customer benefit |
|---|---|
| Very low vapor pressure | Helps reduce lubricant evaporation and backstreaming into the vacuum chamber. |
| 168 cSt viscosity at 20°C | Provides a relatively thick and stable lubricating film for compatible vacuum-pump mechanisms. |
| Chemical inertness | Resists many acids, alkalis, solvents, oxidizers and aggressive process gases. |
| High thermal stability | Helps maintain lubricant performance under elevated operating temperatures. |
| Oxidation resistance | Does not oxidize like conventional hydrocarbon oils, helping limit sludge and varnish formation. |
| No flash or fire point | Helps reduce lubricant-related fire risk compared with flammable mineral or hydrocarbon oils. |
| Low evaporation under vacuum | Supports cleaner vacuum operation and may reduce lubricant consumption. |
| Good lubricating properties | Helps reduce friction and wear between compatible moving pump components. |
| Material compatibility | Compatible with many metals, plastics and elastomers commonly used in industrial equipment. |
| Solvent resistance | Maintains stability in contact with many aqueous and non-aqueous process materials. |
| High dielectric properties | Suitable for electrically sensitive and high-technology production environments. |
| Low surface tension | Promotes wetting and distribution across internal lubricated surfaces. |
| Radiation resistance | Supports use in certain vacuum systems exposed to radiation or energetic particles. |
| Long storage stability | Fomblin® PFPE fluids have a reported shelf life of more than 20 years when stored appropriately. |
Technical Properties of Fomblin® Y LVAC 16/6
The values below are typical properties and should not be interpreted as guaranteed specification limits.
| Property | Typical value | Unit | Test condition or method |
|---|---|---|---|
| Chemical type | PFPE | — | Perfluoropolyether |
| Physical form | Liquid | — | — |
| Average molecular weight | 2,700 | amu | Typical |
| Density | 1.89 | g/cm³ | At 20°C, ASTM D4052 |
| Kinematic viscosity | 168 | cSt | At 20°C, ASTM D445 |
| Viscosity index | 110 | — | ASTM D2270 |
| Vapor pressure | 9 × 10⁻⁸ | torr | At 25°C |
| Vapor pressure | 2 × 10⁻⁴ | torr | At 100°C |
| Pour point | −45 | °C | ASTM D97 |
| Surface tension | 22 | dyne/cm | Published TDS value |
| Heat of vaporization | 8 | cal/g | At 200°C |
| Evaporation weight loss | 3.9 | wt.% | 22 hours at 149°C |
| Flash point | None | — | Standard test conditions |
| Fire point | None | — | Standard test conditions |
Fomblin® Y LVAC Series Comparison
| Property | Y LVAC 06/6 | Y LVAC 14/6 | Y LVAC 16/6 | Y LVAC 25/6 |
|---|---|---|---|---|
| Average molecular weight, amu | 1,800 | 2,500 | 2,700 | 3,300 |
| Density at 20°C, g/cm³ | 1.88 | 1.89 | 1.89 | 1.90 |
| Kinematic viscosity at 20°C, cSt | 64 | 148 | 168 | 276 |
| Viscosity index | 71 | 97 | 110 | 113 |
| Vapor pressure at 25°C, torr | 8 × 10⁻⁷ | 1 × 10⁻⁷ | 9 × 10⁻⁸ | 6 × 10⁻⁸ |
| Vapor pressure at 100°C, torr | 3 × 10⁻³ | 2 × 10⁻⁴ | 2 × 10⁻⁴ | 6 × 10⁻⁵ |
| Pour point, °C | −50 | −45 | −45 | −35 |
| Heat of vaporization at 200°C, cal/g | 11 | 8 | 8 | 7 |
| Surface tension, dyne/cm | 21 | 22 | 22 | 22 |
| Evaporation loss, wt.% | 2.8* | 2.6 | 3.9 | 0.6 |
Common Applications of Fomblin® Y LVAC 16/6
Roots vacuum pumps
The principal application identified for Fomblin® Y LVAC 16/6 in the manufacturer’s vacuum-pump selection table is the lubrication of compatible Roots pumps.
Its 168 cSt viscosity helps provide a stable lubricating film, while its low vapor pressure supports operation where lubricant migration into the process system must be controlled. Equipment-manufacturer approval should be obtained before filling or converting a pump.
Semiconductor manufacturing
Semiconductor fabrication uses vacuum pumps in processes that may involve reactive gases, high temperatures and strict contamination requirements. Fomblin® PFPE fluids are used as vacuum-pump lubricants in this industry because of their chemical stability, low vapor pressure and resistance to aggressive process conditions.
Potential equipment includes pumps supporting:
- Plasma etching
- Chemical vapor deposition
- Physical vapor deposition
- Ion implantation
- Process-chamber evacuation
- Wafer and electronic-component manufacturing
Y LVAC 16/6 should only be specified when its viscosity and pump compatibility have been confirmed.
Chemical-processing vacuum systems
Fomblin® Y LVAC 16/6 may be considered for compatible vacuum pumps exposed to acids, halogens, oxidizing agents, solvents and other chemicals that can degrade conventional hydrocarbon lubricants.
Its PFPE structure provides strong resistance to a broad range of chemical agents. Nevertheless, the exact gas composition, concentration, temperature and system materials must be evaluated before use.
Oxygen and oxidizing-gas service
Fomblin® PFPE fluids are non-flammable and inert to liquid and gaseous oxygen, making them candidates for appropriately designed oxygen and oxidizing-gas systems.
Using PFPE fluid alone does not make a vacuum pump safe for oxygen service. The entire system must be oxygen-clean, free from incompatible hydrocarbon contamination and approved for the intended oxygen concentration, pressure and temperature.
Clean and contamination-sensitive vacuum systems
The very low vapor pressure of Y LVAC 16/6 helps reduce lubricant backstreaming and oil-vapor contamination. This can benefit compatible vacuum systems used in electronics, high-technology manufacturing, analytical equipment and other clean-process environments.
Frequently Asked Questions
What is Fomblin® Y LVAC 16/6 mainly used for?
It is primarily used as a lubricant in compatible Roots vacuum pumps and in demanding vacuum systems requiring low volatility and chemical resistance.
How long does it last in a vacuum pump?
There is no fixed service interval. Fluid life depends on operating temperature, process-gas exposure, contamination, pump condition and maintenance. Monitor fluid condition and pump performance rather than relying only on elapsed operating hours.
What is its shelf life?
Syensqo reports a shelf life of more than 20 years for Fomblin® PFPE fluids when properly stored.
How should Fomblin® Y LVAC 16/6 be stored?
Keep it in its original, tightly closed container in a clean, dry area. Protect the fluid from dust, water, hydrocarbon oils and process chemicals, and follow the latest regional Safety Data Sheet.
Can it be used in every Roots vacuum pump?
No. Confirm the required viscosity, seal compatibility, operating temperature and OEM lubricant approval for the specific pump model.
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