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Vaccum Diffusion Pump Oil MY702

Vaccum Diffusion Pump Oil MY702 


1. Mixed phenylmethyl-dimethyl cyclosiloxane

2. 702 Super high vacuum diffusion pump oil

3. 702 diffusion pump fluid

4. Phenylmethylsiloxane Oligomers

5. Oil for diffusion pump

6. Silicone oil for diffusion pump

7. Silicone diffusion pump oil

Chemical structure:


Vaccum Diffusion Pump Oil MY702 is a kind of general purpose oil designed for fast pumping of large volumes of gas. It is used to produce vacuums in the range of 10-5 to 10-7 torr. It possesses excellent heat stability, good resistance to oxidation and radiation. Its vapour pressure is very low under room temperature, and changes sharply with the variation of temperature.

Technical Index:

Chemical composition: Mixed phenylmethyl-dimethyl cyclosiloxane

Ultimate Vacuum, torr(untrapped):10-6

Saturated Vapor Pressure, torr: 1x10-6

Specific Gravity: 1.08

Viscosity (25°C), cSt: 40±3

Flash Point °C: 300

Refractive Index 25°C: 1.51-1.53

Diffusion Pump Oil MY702 can be used in variety of applications, including:

Electrical and electronics industry

 TV tubes, fluorescent tubes, cathode ray tubes

 ordinary bulbs


 rectifier metallised film vacuum system

Optical industry

 surface improvements

 anti reflective coatings

 optical filters and mirrors

Metallurgy industry

 high-vacuum furnaces

 melting, degassing and sintering refractory metals; thick-film deposition

Plastics industry

 surface improvements

 mirror coatings

 protective coatings

 film coatings

Other industries

processing metals and fuels


molecular plants

R & D plants

mass spectrometry


Be used as transmission fluid in high-temperature carriers and various instruments.

Package, Transportation & Storage:

1. Vaccum Diffusion Pump Oil MY702 is available in 1kg plastic bottles, 1gallon plastic drums, 5kg plastic drums, 25kg plastic drums, 25kg Iron drums or 200kg Iron drums or IBC drums.

2. Transport as non-hazardous chemicals, keeping away from rain and sunlight.

3. Shelf life: 2 years. 

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