TC-704 Diffusion Pump Fluid

DESCRIPTION
OSBORN® TC-704 Diffusion Pump Fluid is a single-component fluid for high vacuums of 10-6 to 10-8 torr
(untrapped) and 10-10 to 10-11 torr (trapped). It performs well in tough, rugged applications and offers
quick pumpdown, even after exposure to air at operating temperatures.

BENEFITS
• Shorter conditioning runs: Single-component silicone fluids reach maximum potential in far less time
than that required for multi-component organic fluids.
• Faster pumping: Diffusion pumps using silicone fluids can operate against 20 to 300 percent higher
forepressures than those using organic fluids. For higher gas through-put at the high-pressure end of
the pump’s operating range, heater input can be increased 20 to 30 percent.
• Minimal backstreaming: The vapor pressure of single-component silicone fluids from OSBORN is so
low that the use of traps – or refrigeration of existing traps – is unnecessary for many applications.
• Longer service life: Thermal and chemical stability of silicone fluids allows exceptionally long runs
without deterioration or contamination.
• Cleaner systems, less maintenance required: Low vapor pressure of silicone fluids at baffle
temperatures results in low migration rates. Jets and boiler surfaces stay clean; silicone fluids exhibit
virtually no breakdown or decomposition under operational conditions.
• Faster cycling, reduced downtime, less frequent fluid replacement: The recovery rate of silicone
fluids after exposure to air at operating temperatures is many times faster than that of organic fluids.
Time is saved between cycles because the outstanding resistance of silicone fluids from OSBORN to
oxidation and hydrolysis allows release of the vacuum without cooling the pump.