X-TRONIX | DuPont Krytox

We supply fluids and lubricants for vacuum or other hi-tech applications

XT-704 Diff Pump Oil

Specialty Vacuum Oil & Grease

xtronix stocks:

Santovac 5® will provide vacuums in the 10^-10Torr range, with exceptionally low vapor pressure and back streaming. It is excellent for applications that must be free from silicones, such as older diffusion-pumped mass spectrometers, leak detectors & Electron Microscopes, or those which require ultra-high vacuums.
XT-704 & XT-705 silicon oil for diffusion pumps (equivalent to DC-704, -705).
Krytox® PFPE rotary vane pump oil and grease.
Silicon-based High Vacuum Grease for ground glassware.

Download this PDF on diffusion pump technology

Krytox® Products

Krytox® Performance Lubricants are the products of choice for applications where complete nonflammability, oxygen compatibility, and resistance to aggressive chemicals are requirements. These synthetic lubricants provide superior performance and extended life as lubricants and sealants.

xtronix caters to a variety of vacuum and non-vacuum applications with different grades of Krytox® oils and greases. We have addressed aerospace related markets, high voltage industrial applications, paper mills, tribology applications in clean room environments, and many others.

An important area of use for Krytox® relates to vacuum-based applications:

Vacuum pumps, where safety is critical
Hostile environments, where semiconductor process chemicals can attack most other lubricants
Vacuum system valves, seals, bearings and connectors, where low vapor pressure, outgassing, and contamination are intolerable

Benefits

Krytox® performance lubricants for vacuum systems are reliable, cost-effective, and safe in all environments. Even in the most chemically severe environments, Krytox® oils and greases are:

Superior lubricants offering thermal stability over a wide range of temperatures
Chemically inert; non-reactive to all elastomers, metals, plastics, and process chemicals
Nonflammable
Insoluble
Resistant to aggressive chemicals
Long-lasting, improving performance and extending the life of components
Low vapor pressure to reduce or eliminate outgassing and contamination
Available in a diverse portfolio of products to perform dependably, regardless of your system's operating conditions

Selection of the best lubricant involves analyzing your operating conditions and choosing from the many synthetic and petroleum based products. Most petroleum products begin to degrade before 99°C (210°F) and cease turning at temperatures just below -18°C (0°F). Krytox® synthetic lubricants have operating ranges from <-70 to >316°C (<-94 to 600°F) (see tables below).

Krytox® Oils and Greases offer a unique combination of properties that provide exceptional, yet cost-effective solutions to your most difficult lubrication problems. Compared to other lubricants, only Krytox® Oils and Greases combine high-temperature performance, non-flammability, and chemical inertness under a variety of conditions. Krytox® Oils and Greases increase the service life of critical components, allowing equipment manufactures to extend warranties, and manufacturing plants to reduce costly maintenance due to component failure. Krytox® Oils and Greases are exceptional lubricants that provide superior protection and load-carrying ability under the most severe conditions. They are especially suited for use in 100% liquid or gaseous oxygen services.

Vacuum Pump Fluids

Krytox® Vacuum Pump Fluids (VPF) are used in applications where conventional vacuum pump oils cause safety, waste disposal and maintenance problems. They are nonflammable and eliminate the chance of fire in pumps. They are non-reactive and safe to use in oxygen systems. They can replace any competitive PFPE fluid as well as any other type of vacuum fluid. Krytox® fluids do not contain acetal groups, which are susceptible to attack by Lewis acids (see PDF datasheet). This gives Krytox® superior stability as a vacuum pump fluid. Krytox® VPF fluids are precisely distilled to provide low vapor pressures and give superior performance (see PDF datasheet). In addition, Krytox® fluids are recyclable.

High Vacuum Greases

A special low-vapour-pressure Krytox® oil is used to formulate a grease for high-vacuum applications. Krytox® greases are an excellent choice for lubricants or sealants used in all vacuum environments, especially when access for repair or replacement is difficult or impossible.

Low vapor pressure greases offer:

Less than 1x10^-13 torr. vapor pressure at 20°C (68°F)
Less than 1x10^-5 torr. vapor pressure at 200°C (392°F)

Composition

Krytox® is a PerFluoroPolyEther (PFPE)--also called PerFluoroAlkylEther (PFAE) or PerFluoroPolyAlkylEther (PFPAE). Krytox® fluorinated oils are a series of low molecular weight, fluorine end-capped, homopolymers of hexafluoropropylene epoxide.

Krytox® oils' unique properties are derived from its fluorinated structure. This structure, polyhexafluoropropylene oxide, is an extraordinary fluorinated ether and yields a highly lubricious liquid with extremely low volatility. This polymer is represented in the graphic below. It consists of a carbon (gray) and oxygen (red) ether backbone. This provides a flexible platform onto which the fluorines (green) are attached. The fluorine is responsible for providing the thermal and chemical stability ideal for use in severe environments. Krytox® oil is insoluble in water, acids, bases, and all common organic solvents and is nontoxic.

Molecules picture

The polymer chain is completely saturated and contains only the elements carbon, oxygen, and fluorine; hydrogen is not present. On a weight basis, a typical Krytox® oil contains 21.6% carbon, 9.4% oxygen, and 69.0% fluorine.

The Chemical Abstracts Index name for Krytox® fluorinated oils is oxirane, trifluoro (trifluoromethyl), homopolymer and the CAS Registry Number is 60164-51-4.

Krytox Oil

Krytox® Vacuum Pump Fluids*

Krytox® 1500 Vacuum Pump Fluids are also available with antirust protection. The fluids are called 1506XP, 1514XP, 1525XP and 1531XP. They have all of the same properties of the standard fluids listed in the PDF below. Krytox® XP oils contain a soluble additive to prevent rust. This new patented additive enhances the performance of Krytox® VPF fluids, giving them improved performance properties. The long-term antirust properties repel moisture, providing extra protection from corrosion of metal parts and bearing surfaces.

While Krytox® VPF fluids are inert and nonreactive to all elastomers, plastics, and metals, the soluble additives in the XP products are new and have not been tested with all materials. It is possible that some reactivity and damage could occur to some materials. Initial testing has shown no problems with Teflon®, Kalrex®, Viton®, nitrile, and silicone rubbers. There is some reactivity of the additive with copper, but it is less with brass. These additives could have degradation of performance at elevated temperatures over 175°C (347°F) over a long period of time.

Download datasheet for 1500 & 1600 fluids

Krytox® LVP High-Vacuum Grease*

Download datasheet for LVP grease

DuPont does not make any express or implied warranty that these products will continue to have these typical properties.

*Krytox® is a DuPont de Nemours trade name.