Santovac® 5P Ultra and Santovac® 5 Polyphenyl Ether Vacuum Pump Fluid

Santovac® 5P Ultra Vacuum Pump Fluid

Now there is a higher grade of Santovac 5 diffusion pump fluid. Santovac 5 has been the fluid of choice for diffusion pumps for many years and now an improved grade of fluid is available. Santovac 5P Ultra has the same properties of Santovac 5 but guarantees minimal amounts of the 3 and 4 ring polyphenyl ethers; less than .02% and .1% respectively. This makes Santovac 5P Ultra the fluid of choice for ultra-clean applications such as mass spectrometry. Santovac 5P Ultra is the standard diffusion pump fluid recommended by HP (HP #6040-0809). So if you require the best try Santovac 5P Ultra.

Santovac 5P is the highest quality diffusion pump fluid available for scientific instruments.

Santovac 5 Polyphenyl Ether Vacuum Pump Fluid, Standard Grade

Santovac® 5 vacuum diffusion pump fluid operates efficiently, economically and safely in diffusion pumps, in properly designed systems, to produce ultra-high vacuums in the 10^-10 torr range. The wide liquid range, low vapor pressure and unique balance of properties make it an ideal working fluid in diffusion pumps. Santovac 5 is a light colored, slightly viscous liquid at room temperature. Typical properties are given in the table below. Santovac 5 is an isomeric mixture of five-ring polyphenol ethers.

Low Vapor Pressure

Extremely low vapor pressure results in low ultimate pressures. The vapor pressure of Santovac 5 and 5P Ultra at 25 degrees C determined by extrapolation of higher temperature data is 4 x 10^-10 This, together with low backstreaming characteristics, means that 10^-10 torr vacuums can be obtained in well designed systems without the use of liquid nitrogen traps. These characteristics can also eliminate the need for baffles, allowing greater pumping speed.

Low Backstreaming

Backstreaming depends on the vapor pressure of the fluid and its overall characteristics, the system design, the operating conditions and the temperature of the collecting surface. These oils have inherently low backstreaming characteristics.

Low backstreaming can result in less contamination in chambers and longer term operation for those processes that are sensitive to organic matter. Experience has shown us that polyphenyl ether type fluids like Santovac 5 pump fluid can be used for electronic component manufacture, and for laboratory, analytical instrumental and research applications.

High Thermal Stability

Santovac 5 and 5P Ultra offer unusually high thermal and oxidation stability. Isoteniscope tests show that they remain thermally stable at 870 degrees F. Santovac 5 may discolor with use, but this does not affect its operation as a diffusion pump fluid. Oxidation and corrosion tests, as well as field experience, have shown that Santovac 5P has little tendency to increase in viscosity during the standard testing. These results indicate that there is less chance of overheating and thermal degradation.

The corrosion portion of the test indicates that Santovac 5P Ultra is generally compatible with the metallic materials most often used in diffusion pump manufacture.

Clean and easy to use

Absorbed films of Santovac 5 and 5P Ultra are easier to remove than silicone films. Santovac 5 can be easily baked off in vacuum or cleaned with standard solvents.

Elastomer Compatability

Viton®, PTFE, butyl and silicone have been found to be generally compatible with Santovac 5. Since elastomer manufacturers are continually formulating and testing new compounds, designers who desire the latest available data should contact the packing and seal suppliers directly. The computability of other non-metallic materials should be checked by tests with the fluid under simulated conditions of use.

Vapor Pressure at 25 deg. C        4 x 10-10 torr
Boiling Point at 0.5 torr          275 deg. C
Specific Gravity, 25/25 deg. C     1.198
VIscosity, cs
     at 27 deg. C              1000cs
     at 38 deg. C              363cs             
     at 99 deg. C              13.1 cs
     at 149 deg. C             4.5 cs
     at 204 deg. C             2.1 cs
     at 260 deg. C             1.2 cs
Pour Point                         5 deg. C
Flash Point (COC)                  288 deg. C
Fire Point (COC)                   349 deg. C
Autogenous Ignition Temperature    590 deg. C
Refractive Index, ND25             1.6306
Latent Heat of Vaporization 
          (355-475 deg. C)     49.2 cal/g
Average Molecular Weight           454
Specific Heat at 20 deg. C         0.35
Thermal Conductivity,
 Watts/m deg. K at 20 deg.C    0.1330
Density
    at 20 deg. C                1.204
    at 38 deg. C                1.187

Other Diffusion Pump Oils:

• Invoil® 704
• Invoil® 705

Part No.	Description	UOM	ship wt.	Quantity In Stock	Price	Quantity to order
SV5	Santovac 5, 500cc bottle (HP #6040-0299)	Bottle	3	3	$905.00
SV100	Santovac 5, 100cc bottle	EA	1	2	$225.00
SV5P	Santovac 5P Ultra, 500cc bottle, (HP #6040-0809)	EA	3	2	$1191.75
SV100P	Santovac 5P Ultra, 100cc bottle	EA	1	0(#)	$297.85
SV185P	Santovac 5P Ultra, 18.5 mL bottle	Bottle	0.25	6	$71.61
(#) Standard lead-time for out-of-stock items is approximately two weeks.
Ordering information. International (non-US) prices available through your local dealer.

Viton® is a trademark of DuPont Dow Elastomers
Santovac® is a registered trademark of Santovac Fluids, Inc.

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