Equivalent Brand: Dow Corning 704, MT-704, and HIVAC-F-4
Diffusion Pump Oil RJ-274 is a colorless to light yellow transparent oily, single-component fluid designed for high vacuum of 10torr (untrapped). It performs well in tough, rugged applications and offers quick pumpdown, even after exposure to air at operating temperatures. RJ-274 is thermally and chemically stable allowing it to keep pump jets free of tars and hard carbon.
Technical Index
Property Specification
Chemical composition Tetramethyl tetraphenyl trisiloxane
Ultimate Vacuum, torr
(untrapped) 10
Saturated Vapor Pressure, torr 510
Specific Gravity 1.06 ~ 1.07
Viscosity (25°C) mm2/s 38±3
Flash Point °C ≥210
Refractive Index 25°C 1.5500~1.5600
Congealing Point °C -35
Molecular Description 484
Diffusion Pump Oil RJ-274 is a colorless to light yellow transparent oily, single-component fluid designed for high vacuum of 10torr (untrapped). It performs well in tough, rugged applications and offers quick pumpdown, even after exposure to air at operating temperatures. RJ-274 is thermally and chemically stable allowing it to keep pump jets free of tars and hard carbon.
Technical Index
Property Specification
Chemical composition Tetramethyl tetraphenyl trisiloxane
Ultimate Vacuum, torr
(untrapped) 10
Saturated Vapor Pressure, torr 510
Specific Gravity 1.06 ~ 1.07
Viscosity (25°C) mm2/s 38±3
Flash Point °C ≥210
Refractive Index 25°C 1.5500~1.5600
Congealing Point °C -35
Molecular Description 484
Main Products
silicone industry