Tetramethyltetraphenyltrisiloxane
DC-704 Series diffusion pump fluid is recommended for systems operating in the 10-6 to 10-8 torr range. The thermal stability allows quick pump downs and keeps pump jet stack free of tars and carbon even after repeated exposure to atmosphere at operating temperatures.
| SPECIFICATIONS | |
|---|---|
| Color | Light Straw |
| Viscosity @ 25°C (77°F), cs | 39 |
| Specific Gravity @ 25°C | 1.07 |
| Specific Gravity @ 70°C | 1.03 |
| Specific Gravity @ 100°C | 1.00 |
| Flash Point °C Open Cup | 221 |
| Boiling Point @ 0.5 torr, °C | 215 |
| Vapor Pressure @ 25°C | 2.1 x 10-8 torr |
| Ultimate Vacuum Untrapped | 10-7 to 10-8 torr |
| Ultimate Vacuum Trapped | 10-11 torr |
| Oxidation Resistance | Excellent |
| Backstreaming Rate | Low |
| Boiler Temperature, °C | 220 |
| PART NUMBER | DESCRIPTION |
|---|---|
| DC-704-50 | 50 cc |
| DC-704-100 | 100 cc |
| DC-704-500 | 500 cc |
| DC-704-1 | 1 Gallon |
Penta Phenyltrimethyltrisiloxane
DC-705 Series diffusion pump fluid is recommended for high vacuum systems operating in the 10-8 to 10-10 torr range. DC-705 is the premier silicone diffusion pump fluid as it displays the same durable physical properties of the 704 Series and the enhanced characteristics of little or no back-streaming and excellent vapor pumping capabilities.
| SPECIFICATIONS | |
|---|---|
| Color | Light Straw |
| Viscosity @ 25°C (77°F), cs | 1.09 |
| Specific Gravity, @ 70°C | 1.04 |
| Specific Gravity, @ 100°C | 1.02 |
| Flash Point °C, open Cup | 243 |
| Boiling Point @ 0.5 torr, °C | 245 |
| Extrapolated Vapor Pressure @ 25°C (77°F) torr | 3 x 10-10 |
| Ultimate Vacuum, torr un-trapped | 10-9 to 10-10 |
| Ultimate Vacuum, torr trapped | 10-11 |
| Oxidation Resistance at Operating Temperature | Excellent |
| Back-streaming Rate | Very Low |
| Boiler Temperature, °C | 250-270 |
| PART NUMBER | DESCRIPTION |
|---|---|
| DC-705-50 | 50 cc |
| DC-705-100 | 100 cc |
| DC-705-500 | 500 cc |
| DC-705-1 | 1 Gallon |
