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PFPE Fluid RUI-F Series

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RUI-F series products is a kind of perfluorinated polymer with only fluorine, carbon and oxygen atoms on the molecular chain. It is used as vacuum pump oils. RUI-F series don’t polymerize when exposed to oxygen, ionizing radiation or accelerated subatomic particles. Using RUI-F products, the system stays free of varnish and deposit from fluid decomposition. RUI-F is resistant to oxidation of explosion and hot fluid. It can be exposed repeatedly to air without harm to the fluid while running the pumps. RUI-F is inert to most reactive chemicals, the fluid can be used in direct contact with materials such as UF6, F2, PCl3, BF3, without harm to the fluid. RUI-F series has lower molecular weight than RUI-M and RUI-H PFPE oil, especially suitable for precision instruments using.

Product Features

● Low vapor pressure, low volatility

● No flash and ignition point

● High temperature stability

● Water and solvent resistance

● Radiation resistance

● Compatibility with Metals, plastics, and elastomers

● Chemically inert

Technical Index

ISO approximate grade1522100150156220320460460460


Viscosity (cst)

Viscosity Index6070108117132134136144144146
Pour Point(°C)<-58<-50-42-39-38-36<-32<-30-30<-27


Loss(%, 22h)


Surface Tension (Dyne/cm)

Density (0°C, g/cm3)1.901.911.921.931.931.941.941.951.951.95


RUI-F series oils are suggested for applications requiring the highest quality vacuum such as in scanning electron transmission microscopes, mass spectrometers, particle accelerators, ion implantation, plasma and vapor deposition processes. In addition, it is suggested for pumps handing reactive gases such as UF6, F2, Oxygen, Ozone, and Tritium, as the fluid can be used in direct contact with those gases without reaction and fluid degradation. Due to its low molecular weight, RUI-F series products are especially suitable for precision instruments using.

Packing & Storage

Our company supplies in the form of 1kg and 5kg plastic drum packaging.

Special requirements can be based on customer requirements to use industrial drum packaging. 

Shelf life: 24 months.