VM-5S oil

VM-5S vacuum oil (TС 38.1011187-88) is produced from sulfurous or low-sulfur paraffinic oils by deep purification and special vacuum distillation. It is used as a working fluid in high-vacuum steam pumps (to create an ultra-high vacuum), in oil-sealed mechanical vacuum pumps.

Physical and chemical indicators of VM-5S vacuum oil (TС 38.1011187-88)

Name of the indicator Norm GOST (TС)
Density at 20 °C g/cm3, not more than 0,8750
Colour, units of COP, not more than Colourless liquid
Odour Absence
Kinematic viscosity, mm² / sec, at 50°С, not less than 42
Flash Point, °С, in the open crucible, not less than 250
Water content, % Absence
Content of mechanical impurities, % Absence
Mass fraction of water-soluble acids and alkalis, % Absence
Ash, %, not more than 0,01
Vapor Pressure at 20°C, PA (mm Hg), not more than 4,0×10-7 (3,0×10-9)
Boiling point at which the vapor pressure is 1.33 Pa (1 × 10-2 mm Hg), ° С 170-180