Mechanical Pump Oils

OTHER PRODUCTS > OILS & LUBRICANTS  > MECHANICAL PUMP OILS

Mechanical pump oils Edwards supplies the widest range of oils of different viscosities and specifications to enable customers to obtain the best performance from mechanical pumps under different application conditions. Mineral oils are manufactured by a hydro treatment process to reduce carcinogenic risk. All are specially prepared for high vacuum use, having low vapour pressures even at high temperatures. The particular mechanical pump specification should be consulted to find which oil to use.

Vapour pressure mbar 20°C

Vapour pressure mbar 100°C

Molecular weight

Specific gravity at 15 °C

Viscosity cSt at 20 °C

Viscosity cSt at 40 °C

Pour point °C

Flash point °C

Auto ignition point °C

Ultragrade 15

5.8x10-6

3.0x10-2

385

0.86

104.2

38.1

-18

220

355

Ultragrade 19

1x10-8

1.0x10-3

420

0.86

143.7

48.6

-16

220

355

Ultragrade 20

2.1x10-7

3.0x10-3

500

0.86

352

103

-12

220

365

Ultragrade 70

2.1x10-7

3x10-3

600

0.86

222

70

-12

230

360

Edwards TW

1.3x10-6

-

430

0.86

155

65

-12

243

270

Fomblin® 06/6

4x10-6

5x10-3

1900

1.88

64

25

-50

none*

none*

Krytox® 1506

5.2x10-7

1.3x10-3

2400

1.88

70

22

-45

none*

none*

Fomblin® 16/6

3x10-6

1x10-3

2700

1.89

168

48

-45

none*

none*

Krytox® 1514

2.6x10-7

1.3x10-4

3500

1.89

140

48

-40

none*

none*

Fomblin® 25/6

4x10-8

6x10-5

3300

1.9

276

80

-35

none*

none*

Krytox® 1525

1.3x10-7

3.9x10-5

4600

1.9

250

80

-35

none*

none*

* WARNING – Perfluoropolyether is a fluorinated compound which will give off toxic vapours if exposed to temperatures above 280 °C. The fluid should not be exposed to naked flames and smoking should be prohibited in the working area.
 † Vapour pressure at 25 °C.

Ultragrade mineral oils

Edwards offers a range of mineral oils, Ultragrade 15, 19, 20 and 70, which result from a new process. Most manufacturers use a solvent refining process, whereas these oils are produced by a unique hydrotreating process. This process eliminates nitrogen, sulphur and oxygen and the aromatic hydrocarbons, leaving a clear base stock essentially free of impurities. When combined with additives, the Ultragrade oils give improved vacuum performance, thermal and oxidation stability and rust inhibition. The anti-oxidants included in the oils enable the pump to withstand high operating temperatures without oil degradation, so extending intervals between oil changes.

The properties of the oils allow them to be used in a wide range of applications. New Ultragrade 70 oils are the best choice for large pumps used in heavy-duty, cycling applications. Contact Edwards or your local supplier for detailed recommendations.

Ultragrade oil

Ultragrade 15

Ultragrade 19

Ultragrade 70

Ultragrade 20

Use in

E2M0.7, E2M1.5. Also suitable for cold start applications

RV pumps, E2M18, E2M28

E2M40 to E2M275

EH boosters

Documentation

Spectroscopy magazine

Edwards TW

Edwards TW has been developed for applications where rotary pump oils are likely to be exposed to reactive or corrosive gases. The oil is distilled hydrocarbon containing no additives, but unsaturates and aromatic links have been removed. The result is that the oil will last up to 20 times longer, depending on process, than refined mineral oils. Longer oil life significantly extends the intervals between oil changes.

Edwards 45 oil

Edwards 45 is a hydrocarbon synthetic polymer whose molecular structure offers chemical inertness, high temperature stability and low vapour pressure (< 10-7 mbar at 25 °C). It is commonly used in mass spectrometry applications because of its well defined peaks. Edwards 45 oil is non-toxic, non-corrosive and reclaimable.

Perfluoropolyether Oils

Edwards now offers an extended range of Fomblin® and Krytox®, perfluoropolyether oils for use in rotary vacuum pumps. Fomblin® YVAC 06/6 and Krytox® 1506 are recommended for Edwards oil sealed rotary pumps and are practically a direct replacement for mineral oil in terms of viscosity and vapour pressure. Krytox® 1525 is suitable for use in rotary pumps requiring a viscosity equivalent to Fomblin® Y25 fluid. Fomblin® Y16/6 and Krytox® 1514 are recommended for use in perfluoropolyether adapted mechanical booster pumps. Edwards, in conjunction with Ausimont UK, has developed Drynert fluid which contains anti-rust and antiwear additives soluble in Fomblin®. These additives cover metallic surfaces with a protective, corrosion resistant film.

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