professional manufacturer of
Phenylmethyl silicone oil & Diffusion Pump oil


Name of commodity
274 Diffusion Pump Oil
(Equal to Dow Corning 704, MT-704, and HIVAC-F-4)


Structure formula 

Performance and Technical Indexes

Appearance and Properties: Colorless transparent liquid

Technical Indexes


 Property     Value
    Viscosity (25°C )mm2/s     36 ± 4cs
    Diopter 25°C     ≥1.05
    Specific Gravity       1.050  ~ 1.080
    Flash Point °C     ≥ 210
    Condensation Point °C     ≤ -35
    Minimal Vacuum Level , Pa     Max. 3.99 X 10-7
    saturated vapor pressure, Pa     Max. 6.65 X 10-8


Performance and Applications
The product is colorless transparent oil liquid with good resistance to oxidation, lower saturated vapor pressure, high vacuum and stable performance, as well as long service life. It is mainly suitable for Ultra-high Vacuum Diffusion Pump used in areas of electronics, metallurgy, and instrument manufacturing, and can also be used as transmission fluid in high-temperature carriers and various instruments.

Transport as non-hazardous chemicals, keeping away from rain and sunlight.
Shelf life: 3 years. It still can be used after being tested and qualified when exceeding the shelf life

SingShine 274 Diffusion Pump Oil is available in 200 kg Iron Drum, or 25/50kg plastic Drums, or 950kg Totes(IBC).


TEL: 86-0552-2077273 FAX: 86-0552-2067496 MOBILE: 86-15955200213 ADDRESS: Room 1409, Bengbu Building, Huaihe Street 1011#, Bengbu, Anhui, CHINA