Description
Lesker Silicone Pump Fluids | 704, 704-T, 705
KJLC 704 & 704-T Features:
- 704 1gal. (PN): 704CA
- 704 (500cc) (PN): 704BB
- 704-T (PN): 704CA-T
- Use in identical applications requiring Dow Corning DC 704®
- Useful in medium and large pumping speed diffusion pumps in a wide variety of research and production applications
- High resistance to oxidation and hydrolysis at operating temperature
- Ideal fluid for aggressive applications requiring ultimate pressures (without trapping) in the 10-7 Torr range
- With first class LN2 traps, chamber pressures can approach 10-11 Torr range
- Applications include vacuum metal casting, diffusion bonding, and instruments (electron microscopes, TOF mass spectrometers, etc.)
- 704-T offers a higher resistance to crystallization
KJLC 705 Features:
- 705 (PN): 705CA
- 705 500cc (PN): 705BB
- Use in identical applications to Dow Corning DC 705® fluid
- Low vapor pressure and low backstreaming rate make LN2 traps unnecessary for pressures in the 10-8 Torr range
- With first class LN2 traps, the ultimate pressure can reach 10-11 Torr
- The high stability and high spontaneous ignition temperatures of this top-of-the-line diffusion pump fluid make it ideal for use in space-simulation chambers
- Applications include thin film coating systems, inexpensive surface science systems, and plasma physics research
NOTE: Do not use silicone fluids in mechanical pumps.
Crystallization / Solidification
Known sensitive applications where 704-T may provide a better solution with a higher resistance to crystallization:
- Optical coaters (lens) with high throughput system
- Oxide deposition applications
- Glass coaters
- Air leaks are present
Technical Specifications :
KJLC 704
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Flash Point 220°C (Open Cup)
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Boiling Point @0.06 Torr (°C): 223
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Specific Gravity @25°C: 1.10 (g/cc)
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Viscosity 41.2 cSt @ 25°C
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Ultimate Vacuum (Torr) Untrapped: 10-7 to 10-8 Trapped: to 10-11
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Surface Tension 37.5 (dynes/cm)
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Molecular Weight 484
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Extrapolated Vapor Pressure (Torr) @25°C: 8.4 x 10-8
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Typical Boiler Temp. 230
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Heat of Vaporization 22.0/200°C (kcal/g mole)
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Molecular Description Tetamethyl Tetraphenyl Trisiloxane
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KJLC 705
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Flash Point 243°C (Open Cup)
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Boiling Point @0.06 Torr (°C): 245
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Specific Gravity @25°C: 1.09 (g/cc)
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Viscosity @25°C, 165-185
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Ultimate Vacuum (Torr) Untrapped: 10-9 to 10-10 Trapped: to 10-11
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Surface Tension 36.5 (dynes/cm)
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Molecular Weight 546
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Extrapolated Vapor Pressure (Torr) @25°C: 3 x 10-10
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Typical Boiler Temp. 248 to 265
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Heat of Vaporization 28.2/250°C (kcal/g mole)
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Molecular Description Pentaphenyl Trimethyl Trisiloxane
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KJLC 704-T
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Flash Point 220°C (Open Cup)
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Boiling Point @0.06 Torr (°C): 210
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Specific Gravity @25°C: 1.07 (g/cc)
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Viscosity 37 cSt @ 25°C
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Ultimate Vacuum (Torr) Untrapped: 10-7 to 10-8 Trapped: to 10-11
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Surface Tension 37.3 (dynes/cm)
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Molecular Weight 490
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Extrapolated Vapor Pressure (Torr) @25°C: 8.4 x 10-8
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Typical Boiler Temp. 230
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Heat of Vaporization 22.0/200°C (kcal/g mole)
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Molecular Description Tetamethyl Tetraphenyl Trisiloxane
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