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Reference Manual
00809-0100-4002, Rev BB
November 2012
5-5
Rosemount 1199
FILL FLUID
SPECIFICATIONS –
SILICONE 705
Silicone 705 Description
Silicone 705 is a silicone fluid for high vacuum and high temperature industrial
applications. Silicone 705 has a higher molecular weight than even Silicone
704, which extends seal operating temperatures. Its main limitation is high
viscosity 175 cSt at 25 °C (77 °F), and so heat tracing of capillaries is often
needed for acceptable response time. The 0.03 in. (0.7 mm) ID capillary is not
allowed for Silicone 705 because of its higher viscosity. Manufacturer states it
neither represents or tests this fluid for medical or pharmaceutical
applications.
Temperature Limits
At Atm Pressure
20 to 350 °C (68 to 662 °F)
Short Term Exposure: (1 Hour max)
20 to 400 °C (68 to 752 °F)
Max Temp at Min. Pressure
See vapor-pressure curve
Viscosity at 25 °C (77 °F)
175 cs
Specific Gravity @ 25 °C (77 °F)
1.09
Coefficient of Thermal Expansion
0.00077 cc/cc/C (0.00043 cc/cc/F)
Chemical Name
Trimethylpentaphenyl trisiloxane
CAS Number
3390-61-2
Silicone 705 Vapor Pressure Results (ASTM E1782)
Содержание 1199
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